2023 Trianco Boiler Error & Fault Codes
All Trianco boilers use error codes to communicate between the boiler and the user. These boilers alert you when there is a fault by a series of lights or even a set code displayed on the control panel. It is a simple but very effective way to alert you to a potential issue with the system.
The fault codes are useful because if one does occur, which is quite possible as the control will be checking for faults continually, it means that there is a problem with the boiler which needs to be looked at to make sure that it is safe to continue using. A check of the list below will show you what error codes are valid for your particular boiler and what they mean if they do occur.
Aztec Mini Combi, System & Classic Plus Boiler Fault Codes
| Fault Code | Protection Function | Description |
|---|---|---|
| E2 | Current leakage | Moisture on circuit board or the boiler has condensation internally |
| E3 | Water temperature sensor | Sensor is short circuit or open circuit |
| E5 | DHW temperature sensor | Sensor is short circuit or open circuit |
| E9 | Antifreeze fault | Heating water temperature is too low |
| EC | Display Disconnected with PCB | Display Disconnected with PCB |
| F1 | Dry Fire Protection | No water flow |
| F4 | Low Water Pressure | System is low on water |
| F6 | No water Flow | Air in the system, no water or water pump not working, pump is blocked, water flow switch blocked, water flow switch is faulty |
| External earth leakage protector trip (RCD) | Display screen does NOT light up. | |
| Dry burning temperature controller trip | Display screen does NOT light up. | |
| No heating | Equipment temperature does NOT rise. | |
Classic 2, 6, 9, 11 & 12KW Boiler Faults
If you find that your Trianco boiler is failing to start and there is no apparent reason, check the following:
If the green LED is NOT illuminated:
- Red LED on: get in contact with your local service engineer.
- Flashing red LED: Open circuit - the boiler is still operational though an engineer needs to be contacted.
Always check to ensure any external controls such as your thermostat or programmer/timer are actually requesting heating.
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