Intergas HRE / Rapid / ECO RF fault 5
Poor flame signal
Gas boilerWhat it means
The boiler controller has detected a poor/weak flame signal.
Likely causes
- Condensate drain blocked
- Incorrect CO2 adjustment of gas valve
- Earth fault
- Gas tap closed
- Air in gas pipe
- Gas supply pressure too low
- No ignition / worn ignition electrode
- No spark / faulty ignition unit on gas valve
- Gas/air adjustment not correctly set
- Fan faulty
- Fan dirty
- Gas valve faulty
- Gas supply pressure too high
- Incorrect ignition gap
- Weak spark
- A different gas type is connected to the appliance than the one it was factory-set for
Where to start
- Press the On/Off button to start the appliance - heat exchanger heats up and service display shows 3, 4 and 7 depending on status of DHW disabling switch and/or Open Therm regulation
- Adjust pump setting depending on maximum power set and resistance in CH installation (see §10.3 parameter setting and §10.5 for pump head/pressure loss)
- Set room thermostat higher than room temperature - appliance switches to CH operation and display shows 5
The full answer, free
- 68 more checks in order
- The readings and component tests from the manual
- How to put it right, step by step
- The manual page for this fault (page 49), right under the answer
Safety: Isolate gas and power before you open the case. If you have been into the gas side, do a tightness test, and a combustion and flue check before you hand back. Gas Safe (UK) or RGI (Ireland) work only.
From the Intergas manual for the HRE / Rapid / ECO RF. Check the model on the data plate before you order parts.