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If the Glow Worm boiler flashes an error code, it is recommended you don't reset the error code yourself. In some cases resetting the error code will only be a temporary solution but at other times with your Glow Worm boiler could render it inoperable. This is why it's a good idea to try and diagnose the issue yourself – but only if you're qualified and experienced enough and know what you're doing, or call out a professional Glow Worm engineer.
An error code will flash on the display panel of your boiler. These codes are designed to help users to resolve general faults and they appear when something has gone wrong with your boiler.
Glow Worm error codes are used to diagnose problems and faults within your boiler system. Here we provide a comprehensive list of error codes for Glow Worm boilers, together with an explanation as to what each means and how to fix the problem.
Glow Worm boiler error codes indicate a problem your Glow Worm boiler has detected, for example a faulty part or poor flame characteristics. The Boiler Error Codes are categorised into five categories that describe what the errors are and what you need to do about them.
Below is a list of Glow Worm Betacom Boiler Error Codes. Each code contains a short explanation for the cause of the problem, what effect it can have on your boiler and what you can do to get it fixed.
Fault Code | Possible Cause |
---|---|
Red LED on | Lockout - Low water pressure, Make sure pressure is above 1.5bar, reset boiler |
Red LED flashing | DHW temperature control knob in service position - Turn DHW control knob into temperature range |
Red LED flashing | Overheat - Check both overheat stats |
Yellow LED flashing | Error - Turn DHW control knob into temperature range and turn CH temperature control knob into power (reset position) and wait for minimum of 30 seconds before turning into either summer or temperature position |
Yellow LED on | Flame present on the burner |
Green LED on | Boiler ready for operation |
Green LED off | No power to boiler - Check for 230volts into the appliance, check fuse on pcb |
Green LED flashing | Boiler in stand-by - Reset position |
There could be many reasons for your boiler troubles, but don't worry because help can be on its way as soon as you check out our list of common Glow Worm Energy Boiler Error Codes and their solutions.
Unless you manage to decipher what the fault codes mean, then you will find it impossible to resolve what's gone wrong with your boiler repair. Check out the list below and use it to get an accurate diagnosis so that the issue can be put right.
Fault Code | Possible Cause |
---|---|
F.00 | Fault: Flow temperature sensor |
F.01 | Fault: Return temperature sensor |
F.10 | Short circuit: Flow temperature sensor |
F.11 | Short circuit: Return temperature sensor |
F.12 and F.91 | Short circuit: Cylinder temperature sensor |
F.13 | Short circuit: Domestic hot water cylinder temperature sensor |
F.20 | Safety switch-oft. Overheating temperature reached |
F.22 | Safety switch-oft. Low water pressure in the boiler |
F.23 | Safety switch-oft. Temperature difference too great (NTC1/NTC2) |
F.24 | Safety switch-oft. Temperature rise too fast |
F.25 | Safety switch-off. Flue gas temperature too high |
F.27 | Safety switch-off. Fault in flame detection |
F.28 | Fault: Ignition unsuccessful when starting up |
F.29 | Fault: Flame loss |
F.32 | Fan frost protection function active: Fan speed outside the tolerance values |
F.33 | Fan frost protection function active: Air pressure switch fault |
FA9 | eBUS fault: Voltage too low |
F.61 | Fault: Gas valve control system |
F.82 | Fault: Gas valve switch-off control |
F.83 | Fault: EEPROM |
F.64 | Fault: Electronics/sensor/analogue-to-digital converter |
F.85 | Fault: Electronics temperature too high |
F.67 | Value sent back by ASIC is incorrect (flame slgnal) |
F.88 | Fault: Unstable flame (analogue input) |
F.70 | Invalid product code (DSN) |
F.71 | Fault: Flow/return temperature sensor |
F.72 | Fault: Deviation in the water pressure sensor/return temperature sensor |
F.73 | Fault: Water pressure sensor not connected or has short-circuited |
F.74 | Fault: Electrical problemin the water pressure sensor |
F.75 | Fault: Pressure sensor |
F.78 | The safety cut-out in the primary heat exchanger is defective |
F.77 | Fault: Condensate or smoke |
F.78 | Interruption to DHW outlet sensor at external controller |
F.83 | Fault: Burner temperature sensor |
F.84 | Fault: Flow/return temperature sensor |
F.85 | Fault: Temperature sensor |
F.88 | Fault: Underfloor heating contact |
F.87 | Fault: Electrodes |
F.88 | Fault: Gas valve |
F.89 | Fault: Pump |
Connection | No communication between the PCB and the user interface |
If you're not sure what Glow Worm Betacom A Range Boiler Error Codes mean then have a look at our list of codes below and use them with confidence when you need professional help to sort out any boiler problems.
If you are not familiar with fault codes then you could be at the mercy of a boiler fix company with little or no knowledge of Glow Worm products. It's absolutely essential that if your boiler displays error codes that you use a company that has experience in repairing these products.
Fault Code | Possible Cause |
---|---|
F00 | Flow heating temperature sensor fault |
F01 | Return heating temperature sensor fault |
F10 | Flow heating temperature sensor fault |
F11 | Return heating temperature sensor fault |
F20 | Overheating fault |
F22 | Low water pressure |
F23 | Water circulation fault |
F24 | Water circulation fault |
F26 | Fault in gas valve |
F27 | Flame detection fault |
F28 | Ignition fault |
F29 | Loss of flame during operation |
F32 | Incorrect air pressure |
F49 | EBUS voltage fault |
F61 | Fault in the main board |
F62 | Fault in the main board |
F63 | Fault in the main board |
F64 | Fault in the main board |
F65 | Fault in the main board |
F67 | Fault in the main board |
F68 | Fluctuation of flame signal |
F70 | User interface incompatible with the main board |
F71 | Flow heating temperature sensor fault |
F72 | Permanent temperature difference between flow and return heating sensors |
F73 | Heating circuit pressure sensor fault |
F74 | Heating circuit pressure sensor fault |
F76 | Thermal fuse fault |
F77 | Fault in gas valve motor |
F83 | No water in the installation |
F84 | Permanent temperature difference between flow and return heating sensors |
F85 | Flow and Return heating sensor fault |
F86 | Underfloor heating contact fault |
Err | User interface fault |
All too often, the Glow Worm Betacom C Boiler Error Codes you see popping up on your boiler's display when things go wrong can be confusing and difficult to understand. If you don't know what the fault codes mean or you don't know how it applies to you then it's going to be very difficult for the engineers who come out to fix your boiler if you phone them.
Fault Code | Possible Cause |
---|---|
Temperature 30 flashing | Fault on CH thermistor |
Temperature 40 flashing | Fault on DHW thermistor |
Temperature 50 flashing | Fault on outside sensor |
Temperature 60 flashing | Low system pressure |
Temperature 70 flashing | Fault on APS |
Temperature 80 flashing | Overheat open circuit |
Temperature 90 flashing | Flame or gas failure |
If your Glow Worm Compact E Range Boiler is displaying any of the following codes, or a combination of the codes below we can help you to identify and resolve your E Range boiler problems.
Fault Code | Possible Cause |
---|---|
No DHW | Check dhw microswitch |
No C/H | Check dhw microswitch if dhw demand led is lit |
No C/H but boiler is firing | Check divertor motor and cartridge |
Boiler locks out within 10 seconds | Check pump proving switch, air pressure switch and overheat stat |
Poor burner pressure | Check burner pressure/ignition adjustment pots on PCB |
When something goes wrong in your Compact S Range Boiler, the first thing to do is check the error codes. Use this guide and you will be able to understand and solve the problem!
The Glow Worm company has made the lives of its customers easier by introducing codes that can be flashed at their boilers to let them know when different errors occur. The error codes are cryptic but can be easily diagnosed using our list below!
Fault Code | Possible Cause |
---|---|
No DHW | Check external controls, Please test for 230V on switch live contact |
No C/H | Check external controls, Please test for 230V on switch live contact |
No C/H or DHW | Check external controls, Please test for 230V on switch live contact |
Boiler locks out within 10 seconds | Check pump proving switch, air pressure switch and overheat stat |
Poor burner pressure | Check burner pressure/ignition adjustment pots on PCB |
We've made a list of Glow Worm CI Range Boiler Error Codes for you to use when you phone up the professionals or perhaps speak to them via email. Having this list with you will mean they know what you are talking about straight away.
The fault codes should be included in the user manual when you purchase the appliance. If you don't have a manual or it's missing the codes, please contact the manufacturer who can give you a printout.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F2 | Fan/APS |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F7 | Domestic hot water thermistor |
F8 | Tank thermistor (N/A For this appliance) |
F9 | Water pressure sensor fault (please contact GW technical department for further information |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F12 | Connection fault between main pcb and display pcb |
F13 | Main pcb connection fault |
F14 | Central heating flow temperature > 95 degrees |
F15 | Gas valve stepper motor fault |
F16 | Flame detection fault |
F17 | Power supply is less than 170v |
F18 | User interface fault |
F19 | Central heating thermistor unplugged |
F20 | Software incompatibility |
All Glow Worm CI Plus Range Boilers have an electronic control unit that is programmed to give different error messages if it detects a problem with the boiler or domestic hot water system - this is useful as it means there are not just manuals and phone numbers to call for boiler problems, instead you can rely on a code to tell you what's wrong.
There are many different reasons why your boiler may fail to operate and produce no hot water or heat. Below you can find a list of Glow Worm CI Plus boiler error codes.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F2 | Fan/APS |
F3 | Air fault |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F7 | Domestic hot water thermistor |
F8 | Tank thermistor (N/A For this appliance) |
F9 | Water pressure sensor fault (please contact GW technical department for further information |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F12 | Connection fault between main pcb and display pcb |
F13 | Main pcb connection fault |
F14 | Central heating flow temperature > 95 degrees |
F15 | Gas valve stepper motor fault |
F16 | Flame detection fault |
F17 | Power supply is less than 170v |
F18 | User interface fault |
F19 | Central heating thermistor unplugged |
F20 | Software incompatibility |
There are a number of error codes which may show up on your Glowworm CXi boiler. This makes sense if you think about it, as the boiler is a complex device with many different parts that can go wrong, so it's important to be able to identify which code represents which problem.
There are several different error codes that the Glow Worm CXI Range boiler could display, and they all mean different things, so it is sometimes hard to work out just what the problem is. This guide will help you decipher them and work out what needs to be done.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F2 | Fan |
F3 | Fan unable to reach ignition speed |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F7 | Domestic hot water thermistor |
F8 | Tank thermistor (N/A For this appliance) |
F9 | Water pressure sensor fault (please contact GW technical department for further information |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F12 | Connection fault between main pcb and display pcb |
F13 | Main pcb connection fault |
F14 | Central heating flow temperature > 95 degrees |
F15 | Gas valve stepper motor fault |
F16 | Flame detection fault |
F17 | Power supply is less than 170v |
F18 | User interface fault |
F19 | Central heating thermistor unplugged |
F20 | Software incompatibility |
F24 | Central heating return temperature > 90 degrees |
F25 | Poor circulation |
F26 | Poor circulation |
Below is an index to Glow Worm Flexicom CX Range boiler error codes that you can use if your boiler is displaying a fault code and you need to know what it means. If your boiler or heating system is giving you problems in the form of error codes or flashing lights, the Glow Worm range is ready with the relevant information to help you get on top of the problem and back to enjoying your heating system once again.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F3 | Fan unable to reach ignition speed |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F7 | Domestic hot water thermistor |
F9 | Water pressure sensor fault, blocked flow filter or pump fault |
F10 | Central return flow thermistor |
F11 | Flow and or return thermistor fault |
F13 | PCB memory or sensing fault |
F14 | Gas valve control defective |
F15 | E-bus voltage failure |
F22 | Low water pressure or ignition temperature rise too slow |
F24 | Central heating return temperature > 90 degrees |
F25 | Circulation fault |
F43 | Generic error |
F70 | Software incompatible |
F73 | Unable to see pump activate |
F77 | Condensate pump error (optional) |
There are many different error codes relating to Glow Worm Flexicom HX Range Boiler boilers but there are a few that occur more frequently than others. If you are experiencing any of the errors below on your Glow Worm Flexicom HX Range Boiler, our troubleshooting guide will help you find a solution so that your boiler can be operating again as soon as possible.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F3 | Fan unable to reach ignition speed |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F9 | Low water pressure Sensor |
F10 | Central return flow thermistor |
F11 | Flow and or return thermistor fault |
F13 | PCB memory or sensing fault |
F14 | Gas valve control defective |
F15 | E-bus voltage failure |
F22 | Low water pressure or ignition temperature rise too slow |
F25 | Circulation fault |
F43 | Generic error |
F70 | Software incompatible |
F73 | Unable to see pump activate |
F77 | Condensate pump error (optional) |
Each time you get an error message from your Flexicom SX there is information provided on what to look for and how to rectify the situation. Take a look at our list of Flexicom SX range boiler error codes below, familiarity with this list will give you piece of mind, and help you deal with your boiler more effectively.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F3 | Fan unable to reach ignition speed |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F7 | Domestic hot water thermistor |
F9 | Low water pressure Sensor |
F10 | Central return flow thermistor |
F11 | Flow and or return thermistor fault |
F13 | PCB memory or sensing fault |
F14 | Gas valve control defective |
F15 | E-bus voltage failure |
F22 | Low water pressure or ignition temperature rise too slow |
F25 | Circulation fault |
F43 | Generic error |
F70 | Software incompatible |
F73 | Unable to see pump activate |
F77 | Condensate pump error (optional) |
Boilers need regular servicing to keep them in top condition and this is why a Glow Worm HXI Range Boiler Error Codes list could be handy for our heating professionals. Knowing what these mean can help to make the correct diagnosis and get your heating and hot water back up to running perfectly again.
Have you got a Glow Worm HXI Range Boiler Error Code and don't know what it means? Use our code list below to get help with boiler problems.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F2 | Fan |
F3 | Fan unable to reach ignition speed |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F7 | Domestic hot water thermistor |
F8 | Tank thermistor (N/A For this appliance) |
F9 | Earlier models only (please contact GW technical department for further information) |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F12 | Connection fault between main pcb and display pcb |
F13 | Main pcb connection fault |
F14 | Central heating flow temperature > 95 degrees |
F16 | Flame detection fault |
F17 | Power supply is less than 170v |
F18 | User interface fault |
F19 | Central heating thermistor unplugged |
F20 | Software incompatibility |
F24 | Cental heating return temperature > 90 degrees |
F25 | Poor circulation |
F26 | Poor circulation |
Error code numbers are used by Glow Worm to denote faults with their SI Range. The first thing to remember is that these codes are specific to the SI Range of boilers.
This list of fault codes will help you get a better understanding on your boilers error codes and what they mean.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F2 | Fan/APS |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F7 | Domestic hot water thermistor |
F8 | Tank thermistor (N/A For this appliance) |
F9 | Water pressure sensor fault (please contact GW technical department for further information) |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F12 | Connection fault between main pcb and display pcb |
F13 | Main pcb connection fault |
F14 | Central heating flow temperature > 95 degrees |
F15 | Gas valve stepper motor fault |
F16 | Flame detection fault |
F17 | Power supply is less than 170v |
F18 | User interface fault |
F19 | Central heating thermistor unplugged |
F20 | Software incompatibility |
Glow Worm SXI Range Boiler Error Codes are the letters and numbers you see on the boiler control panel or display when there is a fault. If your boiler keeps making strange noises, flashing lights or doesn't function as planned after it has ignited you should take it seriously.
The error codes will appear on the display panel on the boiler (there may be more than one) and describe exactly what is wrong. Some problems can be easily fixed, others may well require a qualified Glow worm engineer to come out and take a look at your boiler.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F2 | Fan |
F3 | Fan unable to reach ignition speed |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F7 | Domestic hot water thermistor |
F8 | Tank thermistor (N/A For this appliance) |
F9 | Water pressure sensor fault (please contact GW technical department for further information) |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F12 | Connection fault between main pcb and display pcb |
F13 | Main pcb connection fault |
F14 | Central heating flow temperature > 95 degrees |
F15 | Gas valve stepper motor fault |
F16 | Flame detection fault |
F17 | Power supply is less than 170v |
F18 | User interface fault |
F19 | Central heating thermistor unplugged |
F20 | Software incompatibility |
F24 | Cental heating return temperature > 90 degrees |
F25 | Poor circulation |
F26 | Poor circulation |
Fault codes are there to provide an easy way to understand what the CXI is trying to tell you. A blinking light is usually a sign that there is a problem somewhere and needs to be addressed immediately.
If you're not sure what Glow Worm Ultracom2 CXI Boiler Error Codes mean then have a look at our list of boiler codes below and use them with confidence when you need professional help to sort out any boiler problems.
Fault Code | Possible Cause |
---|---|
F00 | Flow heating temperature sensor fault |
F01 | Return heating temperature sensor fault |
F10 | Flow heating temperature sensor fault |
F11 | Return heating temperature sensor fault |
F20 | Overheating fault |
F22 | Low water pressure |
F23 | Water circulation fault |
F24 | Water circulation fault |
F26 | Fault in gas valve |
F27 | Flame detection fault |
F28 | Ignition fault |
F29 | Loss of flame during operation |
F32 | Incorrect air pressure |
F49 | EBUS voltage fault |
F61 | Fault in the main board |
F62 | Fault in the main board |
F63 | Fault in the main board |
F64 | Fault in the main board |
F65 | Fault in the main board |
F67 | Fault in the main board |
F68 | Fluctuation of flame signal |
F70 | User interface incompatible with the main board |
F71 | Flow heating temperature sensor fault |
F72 | Permanent temperature difference between flow and return heating sensors |
F73 | Heating circuit pressure sensor fault |
F74 | Heating circuit pressure sensor fault |
F76 | Thermal fuse fault |
F77 | Fault in gas valve motor |
F83 | No water in the installation |
F84 | Permanent temperature difference between flow and return heating sensors |
F85 | Flow and Return heating sensor fault |
F86 | Underfloor heating contact fault |
Err | User interface fault |
There are a various Glow Worm Ultracom2 SXI Range boiler error codes which can appear on your boiler's display. If you're not sure what the code means or are having problems then we can help provide the meaning as well as how to fix them.
For people who don't know what Ultracom2 SXI fault codes mean then have a look at our list of codes below and use them with confidence when you need professional help to sort out any boiler problems.
Fault Code | Possible Cause |
---|---|
F00 | Flow heating temperature sensor fault |
F01 | Return heating temperature sensor fault |
F10 | Flow heating temperature sensor fault |
F11 | Return heating temperature sensor fault |
F20 | Overheating fault |
F22 | Low water pressure |
F23 | Water circulation fault |
F24 | Water circulation fault |
F26 | Fault in gas valve |
F27 | Flame detection fault |
F28 | Ignition fault |
F29 | Loss of flame during operation |
F32 | Incorrect air pressure |
F49 | EBUS voltage fault |
F61 | Fault in the main board |
F62 | Fault in the main board |
F63 | Fault in the main board |
F64 | Fault in the main board |
F65 | Fault in the main board |
F67 | Fault in the main board |
F68 | Fluctuation of flame signal |
F70 | User interface incompatible with the main board |
F71 | Flow heating temperature sensor fault |
F72 | Permanent temperature difference between flow and return heating sensors |
F73 | Heating circuit pressure sensor fault |
F74 | Heating circuit pressure sensor fault |
F76 | Thermal fuse fault |
F77 | Fault in gas valve motor |
F83 | No water in the installation |
F84 | Permanent temperature difference between flow and return heating sensors |
F85 | Flow and Return heating sensor fault |
F86 | Underfloor heating contact fault |
Err | User interface fault |
We have a list of Glow Worm Ultracom2 35 Store Boiler Error Codes listed below together with an explanation and advice for each so that you can diagnose problems on boilers quickly and easily.
The Ultracom 2 35 store fault codes are a little different than a standard boiler error code list because they act more like an instruction manual for your boiler.
Fault Code | Possible Cause |
---|---|
F00 | Flow heating temperature sensor fault |
F01 | Return heating temperature sensor fault |
F02 | Hot water temperature sensor fault |
F03 | Storage tank temperature sensor fault |
F10 | Flow heating temperature sensor fault |
F11 | Return heating temperature sensor fault |
F12 | Hot water temperature sensor fault |
F13 | Storage tank temperature sensor fault |
F20 | Overheating fault |
F22 | Low water pressure |
F23 | Water circulation fault |
F24 | Water circulation fault |
F26 | Fault in gas valve |
F27 | Flame detection fault |
F28 | Ignition fault |
F29 | Loss of flame during operation |
F32 | Incorrect air pressure |
F49 | EBUS voltage fault |
F61 | Fault in the main board |
F62 | Fault in the main board |
F63 | Fault in the main board |
F64 | Fault in the main board |
F65 | Fault in the main board |
F67 | Fault in the main board |
F68 | Fluctuation of flame signal |
F70 | User interface incompatible with the main board |
F71 | Flow heating temperature sensor fault |
F72 | Permanent temperature difference between flow and return heating sensors |
F73 | Heating circuit pressure sensor fault |
F74 | Heating circuit pressure sensor fault |
F76 | Thermal fuse fault |
F77 | Fault in gas valve motor |
F79 | Storage tank temperature sensor fault |
F81 | Overheating of hot water circuit |
F83 | No water in the installation |
F84 | Permanent temperature difference between flow and return heating sensors |
F85 | Flow and Return heating sensor fault |
F86 | Underfloor heating contact fault |
Err | User interface fault |
When there is an issue with the Glow Worm Ultracom CXI Range Boiler Error Codes then a red light will come on next to the fault. Any errors that occur on this part of the boiler will be displayed in sequence; the first being boiler error code 1 and so on.
Take a look at the list of Glow Worm Ultracom CXI Range Boiler Error Codes below and if you're still not sure if you have a problem or what the problem might mean then please do not hesitate to either search for your boiler's brand name in the search box over on the left hand side of this page or browse around this site for more boiler fault codes.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F3 | Fan unable to reach ignition speed |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F9 | Water pressure sensor fault, blocked flow filter or pump fault |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F13 | PCB memory or sensing fault |
F14 | Gas valve control defective |
F15 | E-bus voltage failure |
F22 | Low water pressure or ignition temperature rise too slow |
F25 | Circulation fault |
F43 | Generic error |
F70 | Software incompatible |
F73 | Unable to see pump activate |
F77 | Condensate pump error (optional) |
No display or Er | loose connection X51 |
The Ultracom CX boilers are renowned throughout the industry for being excellent boilers with excellent boilers with their reliability, efficiency and comfort features.
There are a number of Glow Worm Ultracom CX Range boiler error codes that you may come across. We're going to look at these together so you'll know what they mean and can have confidence when you call in a qualified engineer to fix them for you.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F3 | Fan unable to reach ignition speed |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F9 | Water pressure sensor fault, blocked flow filter or pump fault |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F13 | PCB memory or sensing fault |
F14 | Gas valve control defective |
F15 | E-bus voltage failure |
F22 | Low water pressure or ignition temperature rise too slow |
F25 | Circulation fault |
F43 | Generic error |
F70 | Software incompatible |
F73 | Unable to see pump activate |
F77 | Condensate pump error (optional) |
No display or Er | loose connection X51 |
A list of Glow Worm Ultracom HXI Range Boiler Error Codes that you can find on your boiler user manual. You will be able to use the error codes with confidence when you need professional help to sort out any boiler problems.
These fault codes can lead to an unexpected breakdown which you will not be prepared for without help, and it's important to know how to solve them.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F3 | Fan unable to reach ignition speed |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F9 | Water pressure sensor fault, blocked flow filter or pump fault |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F13 | PCB memory or sensing fault |
F14 | Gas valve control defective |
F15 | E-bus voltage failure |
F22 | Low water pressure or ignition temperature rise too slow |
F25 | Circulation fault |
F43 | Generic error |
F70 | Software incompatible |
F73 | Unable to see pump activate |
F77 | Condensate pump error (optional) |
No display or Er | loose connection X51 |
If your Glow Worm Ultracom SXI Range Boiler error code then it's triple combination of numbers and letters can appear in a few different ways. The most common Glow Worm Ultracom SXI Range Boiler error code that you'll come across is the three digit type. These are normally easy to fix for an engineer and you will find most of the numbers below linked to their related instruction manual.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F3 | Fan unable to reach ignition speed |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F9 | Water pressure sensor fault, blocked flow filter or pump fault |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F13 | PCB memory or sensing fault |
F14 | Gas valve control defective |
F15 | E-bus voltage failure |
F22 | Low water pressure or ignition temperature rise too slow |
F25 | Circulation fault |
F43 | Generic error |
F70 | Software incompatible |
F73 | Unable to see pump activate |
F77 | Condensate pump error (optional) |
No display or Er | loose connection X51 |
If you're not sure what an error code means or if you think your boiler has an error code stuck on the display, then have a look at our list of Glow Worm Ultrapower SXI Range Boiler Error Codes below. We have the most common errors and what the fault might be. You can also find the fault location in the boiler manual and for any other problems that you encounter.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F3 | Fan unable to reach ignition speed |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F9 | Water pressure sensor fault, blocked flow filter or pump fault |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F13 | PCB memory or sensing fault |
F14 | Gas valve control defective |
F15 | E-bus voltage failure |
F22 | Low water pressure or ignition temperature rise too slow |
F25 | Circulation fault |
F43 | Generic error |
F70 | Software incompatible |
F73 | Unable to see pump activate |
F77 | Condensate pump error (optional) |
No display or Er | loose connection X51 |
Xtramax HE range boilers are popular and can be found throughout the UK. Glow Worm have produced an Xtramax with a wide variety of different stats, and each has its own error codes.
If any of the Glow Worm Xtramax HE Range Boiler error codes indicate a fault, we have a list of possible reasons why these could be happening below.
Fault Code | Possible Cause |
---|---|
F1 | Ignition fault |
F2 | Fan |
F3 | Fan |
F4 | Ignition fault |
F5 | Overheat Fault |
F6 | Central heating flow thermistor |
F7 | Domestic hot water thermistor |
F8 | Tank thermistor |
F9 | Water pressure sensor fault (please contact GW technical department for further information) |
F10 | Central return flow thermistor |
F11 | Main board connection fault |
F12 | User interface connection fault |
F13 | PCB memory or sensing fault |
F14 | Gas valve control defective |
F16 | Flame detection fault |
F17 | Power supply is less than 170v |
F18 | User interface fault |
F19 | Central heating thermistor unplugged |
F20 | Software incompatibility |
F23 | Water circulation fault |
F24 | Cental heating return temperature > 90 degrees |
F25 | Maximum temperature rise slope |
F26 | Maximum delta temperature |
This is a list of Glow Worm Xtrafast 96/120 Range Boiler Error Codes, and their meaning. This list applies to Glow Worm boilers made in the UK in 1996 and later. If you have a problem with your Glow Worm boiler, click on the relevant code below to find out further information.
Fault Code | Possible Cause |
---|---|
F00 | No fault |
F02 | Air flow fault |
F04 | Ignition fault - flame detection |
F05 | Overheating |
F06 | Central heating thermistor/wiring fault |
F07 | Domestic hot water thermistor/wiring fault |
F08 | Storage vessel thermistor/wiring fault |
F09 | System pressure sensor fault |
F10 | Fan fault |
F11 | Poor circulation |
F12 | User interface fault |
F13 | Main pcb fault |
F14 | Central heating flow temperature > 97 degrees |
F15 | Gas mechanism fault |
F20 | Communication fault |
Error Codes from Xtrafast 96/120E1 boilers can be very useful, especially if you are not familiar with all of them. If your boiler is running you will know already that there is something wrong.
There is a complete list of Glow Worm Xtrafast 96/120E1 Range Boiler Error Codes below. Each error code has a meaning and helps the engineer identify the fault condition quicker, this is why it is very important to provide an error code or fault description when contacting a boiler repair specialist.
Fault Code | Possible Cause |
---|---|
F00 | No fault |
F02 | Air flow fault |
F04 | Ignition fault - flame detection |
F05 | Overheating |
F06 | Central heating thermistor/wiring fault |
F07 | Domestic hot water thermistor/wiring fault |
F08 | Storage vessel thermistor/wiring fault |
F09 | System pressure sensor fault |
F10 | Fan fault |
F11 | Poor circulation |
F12 | User interface fault |
F13 | Main pcb fault |
F14 | Central heating flow temperature > 97 degrees |
F15 | Gas mechanism fault |
F20 | Communication fault |
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