BoilerFaultCodes.com

Chaffoteaux 80/100 Fault Codes

Combi Natural Gas 24-29 kW 1994-2003 Discontinued

Replaced by: Chaffoteaux Britony

This boiler uses indicator light combinations

Note which lights are on, off, or flashing and at what speed. Match the combination to the table below. Do not reset until you have noted the pattern. How to read fault codes →

Most common fault codes

Lockout
Your boiler has stopped working because it failed to light or stay lit, and it needs a manual restart to try again.
May be DIY safe · £100-250
Overheat detection
Your boiler has shut itself down because it detected that it is running too hot, indicating a potential circulation or sensor problem.
Gas Safe engineer required · £120-250
Red indicator
Your boiler has stopped working because it cannot light the gas burner or keep it burning.
Gas Safe engineer required · £120-250

All 7 fault codes

Code Severity Plain English
Lockout High Your boiler has stopped working because it failed to light or stay lit, and it needs a manual restart to try again.
Orange LED Medium Your boiler is signalling that the burner is currently active or that it is struggling to verify the internal status of the heating system.
Overheat detection High Your boiler has shut itself down because it detected that it is running too hot, indicating a potential circulation or sensor problem.
Red indicator High Your boiler has stopped working because it cannot light the gas burner or keep it burning.
Red indicator (22) High Your boiler has stopped working because it cannot light the internal flame or detect that it is staying lit, so it has shut down for safety.
Red LED High Your boiler has stopped working because it failed to start or got too hot, and it now needs to be manually restarted to begin operating again.
Red lockout indicator High Your boiler has failed to light the flame, so it has safely shut itself down to prevent gas from building up.

Chaffoteaux 80/100 is discontinued — time for a new one?

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

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