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2022 Ideal Boiler Error & Fault Codes


Ideal manufacture some of the best boilers on the market. Boilers are one of the essential parts of any home and ensure the temperature within your property remains at a consistent level, keeping you warm throughout the cold winter months. When your boiler is not operating properly you can have problems with hot water supply or heating.

Ideal boilers contain an error code that identifies and details the fault. This error code will be identified by the control panel on your model of boiler.

On this page you will find all the different error or fault codes that your Ideal boiler may show. If your hot water isn’t at the right pressure, or if you are unable to turn on your heating, check the guide and try to solve it yourself.

Ideal Regular Boiler Error Codes


If you have an Ideal Regular boiler and it has displayed a fault code there may be something wrong with the unit. These error codes can sometimes be hard to decipher – so we’ve provided a comprehensive guide for you to check against your own boiler to tell you exactly what the problem is. With this information you can contact your local engineer to fix it, or get some free quotes to compare direct from our website.

Fault Code Possible Cause
C0Boiler chip card (BCC) activation fault
C2Boiler chip card (BCC) fault
F1Low water pressure
F2Flame loss
F3Fan fault
F4Flow thermistor fault
F5Return thermistor fault
F6Outside sensor failure
F7Low mains voltage
F9Unconfigured printed circuit board (PCB)
L1Flow temperature overheat or no water flow
L2Flame loss
L55 boiler resets in 15 minutes
L6False flame lockout
0The boiler is in standby mode awaiting either a central heating call or hot water demand
CThe boiler has a call for central heating but the appliance has reached the desired temperature set on the boiler
DThe boiler has a call for hot water but the appliance has reached the desired temperature set on the boiler
CThe boiler is operating in central heating mode
dThe boiler is operating in hot water mode
FThe boiler is operating in frost mode

Ideal Logic Max / Plus Regular Error Codes


If your Ideal Logic Max / Plus Regular Boiler is showing an error code on the screen then there’s a problem. If left unattended you could risk that problem becoming a major fault which makes your central heating system completely unusable. Luckily, we've created a list of all the error codes and what they mean below. Contacting a local engineer if one is listed in your area will allow them to diagnose and repair any issues quickly and correctly.

Fault Code Possible Cause
L1Flow temperature overheat lockout or no water flow lockout
L2Ignition lockout
LC5 restarts within 15 minutes
L6False flame lockout
FAFlow return reversed
FDNo water flow
F2Flame loss
FNFlame loss
LNFlame loss
F3Fan fault
L4Control / no flow thermistor fault
F4Control / no flow thermistor fault
L5Return thermistor fault
F5Return thermistor fault
F6Outside sensor fault
F7Low mains voltage Contact electricity provider
F9Printed circuit board (PCB) unconfigured or fault
L9Printed circuit board (PCB) unconfigured or fault
F8Printed circuit board (PCB) unconfigured or fault
L8Printed circuit board (PCB) unconfigured or fault
FUDiff greater than 50c check isolation valves are open

Ideal Logic Max / Plus System Boiler Error Codes


Fault codes in Ideal Logic Max Plus boilers are typically displayed via the display control board mounted on top of the boiler. This is usually found at the bottom left corner or top right corner - depending on which boiler type you have. If you can’t find your boiler control board, then it may be behind a panel door out of sight.

An error code on your boiler can not only be worrying, but also be a sign that your boiler is in need of some serious repairs and maintenance. In the list below we have detailed every single error code you could ever get on your Ideal Logic Max / Plus System Boiler, as well as what it means and what you should do.

Fault Code Possible Cause
L1Flow temperature overheat lockout or no water flow lockout
L2Ignition lockout
LCTurn power off and on
L6False flame lockout
F1Low water pressure
F2Flame loss
FNFlame loss
LNFlame loss
F3Fan fault
L4Control / no flow thermistor fault
F4Control / no flow thermistor fault
L5Return thermistor fault
F5Return thermistor fault
F6Outside sensor fault
F7Low mains voltage – contact electricity provider.
F9Printed circuit board (PCB) unconfigured or fault
L9Printed circuit board (PCB) unconfigured or fault
F8Printed circuit board (PCB) unconfigured or fault
L8Printed circuit board (PCB) unconfigured or fault
FUDifference greater than 50c – check isolation valves are open
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