2024 Heatline Boiler Error & Fault Codes
Heatline boilers are one of the more popular fuel-efficient heating options found in UK homes today. They are incredibly reliable and relatively simple to maintain, but they do have their faults and can, on rare occasions, go wrong. To help you get to grips with your any potential issues, we've put together a list of error codes along with what these mean for your boiler's functionality.
If your Heatline boiler is not producing enough warm water or heating your home to the desired temperature, then you can probably find the solution through tracking down the cause of one of these fault codes. If several faults occur at the same time, the corresponding codes are displayed alternately for two seconds each and take priority over all other displays. To reset them and restart the boiler display, press the reset button.
Capriz2 Boiler Error Codes
| Code | Description | Cause |
|---|---|---|
| F00 | Flow heating temperature sensor fault | Sensor open circuit |
| F01 | Return heating temperature sensor fault | Return heating temperature sensor disconnected |
| F10 | Flow heating temperature sensor fault | Sensor short-circuit |
| F11 | Return heating temperature sensor fault | Return heating temperature sensor shorted |
| F20 | Overheating fault | Overheating safety device activated (97°C) |
| F22 | Water pressure of the installation (<0.3 bar) | Return water valve closed, Pump disconnected, Leak in the installation |
| F23 | Maximum temperature difference reached between return and flow heating | Water circulation fault |
| F24 | Water circulation fault | Malfunction of the pump (excessively rapid temperature increase) |
| F26 | Fault in gas valve motor. | Disconnected or defective cables |
| F27 | Flame detection fault. | Abnormal flame detection |
| F28 | Ignition fault | No return gas / Insufficient gas flow, Gas valve incorrectly adjusted, Defective firing electrode and flame control / Defective igniter unit |
| F29 | Loss of flame during operation | No return gas / Insufficient gas flow, Gas valve incorrectly adjusted, Defective firing electrode and flame control / Defective igniter unit |
| F32 | Incorrect air pressure | Incorrect fan speed. |
| F49 | EBUS voltage fault | Fault in EBUS line, Short circuit in EBUS connector |
| F61 | Fault in the main board | Gas valve command fault |
| F62 | Fault in the main board | Gas valve closure fault |
| F63 | Fault in the main board | Fault in the main board memory |
| F64 | Fault in the main board | Rapid fluctuation of return or fl ow heating sensor. |
| F65 | Fault in the main board | Excessive main board temperature |
| F67 | Fault in the main board | Flame signal fault in the main board |
| F68 | Fluctuation of flame signal | No return gas / Insufficient gas flow, Gas valve incorrectly adjusted, Defective firing electrode and flame control / Defective igniter unit |
| F70 | User interface incompatible with the main board | Incorrect product code |
| F71 | Flow heating temperature sensor fault | Flow heating temperature sensor unclipped or defective (no temperature variation) |
| F72 | Permanent temperature difference between flow and return heating sensors | Mismatch between the flow and return heating temperatures (permanent difference) |
Product does not start up: No hot water, no heating
| Cause | Measure |
|---|---|
| The gas isolator cock installed on-site and/or the gas isolator cock on the product is closed. | Open both gas isolator cocks. |
| The cold water stop cock is closed. | Open the cold water stop cock. |
| The power supply in the building is disconnected. | Check the fuse in the building. The product automatically switches on after the power supply is restored. |
| The product is switched off. | Switch on the product. |
| The heating flow temperature or hot water temperature has been set too low. | Set the heating flow temperature and hot water temperature. |
| The system pressure is insufficient. Low water pressure in the heating installation (fault code: F.22). | Fill the heating installation. If the pressure drops frequently, contact an engineer. |
| The system pressure is too high. | Purge a radiator in order to reduce the pressure in the heating installation, or contact your competent person about this. |
| There is air in the heating installation. | Purging the radiators . If the problem occurs again: Inform an engineer. |
| After three successive failed ignition attempts, the system switches to fault mode (fault code: F.28). | Press the power button. The product carries out a new ignition attempt. If the ignition problem is not rectified after three fault clearance attempts, contact a competent person. |
Hot water functioning correctly; heating does not start up.
| Cause | Measure |
|---|---|
| The external controller is not set correctly. | Set the external controller correctly. |
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