5 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Turbomax Plus 824
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 working because it failed to ignite, which could be due to a gas supply issue, a lack of water pressure, or an internal mechanical fault.
This light simply shows that your boiler has successfully ignited and is operating normally.
The yellow light simply means your boiler is currently working correctly to heat your home or provide hot water.
Your boiler is receiving power and is currently switched on, which is the normal state for the unit to be in.
Your boiler has stopped working because it cannot detect a flame, most likely because the gas supply is interrupted or there is air trapped in the pipes.
BoilerFaultCodes