6 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: ecoTEC plus VU
This boiler uses indicator light combinations
Note which lights are on, off, or flashing and at what speed. Match the combination to the cards below. Do not reset until you have noted the pattern. How to read fault codes →
Tap any card for details
Your boiler has stopped trying to light because it cannot detect a flame or is not receiving gas, leaving you without heating or hot water.
Your boiler's fan system is running correctly to safely remove exhaust gases, and the indicator light is simply confirming that this part of the startup process is working as intended.
Your boiler is operating normally and has successfully lit the flame to start heating your home or water.
Your boiler is correctly recognizing that you have turned on a hot tap and is working exactly as it should.
Your boiler is struggling to light the burner, meaning it is currently unable to produce heat or hot water.
Your boiler is receiving electrical power and is currently in its normal standby state, ready to provide heating or hot water when requested.
BoilerFaultCodes