Chaffoteaux Boiler Fault Codes

429 fault codes across 42 Chaffoteaux boiler models — explained in plain English.

Chaffoteaux fault codes on this site

We document 429 fault codes across 42 Chaffoteaux models, covering 195 distinct codes. Chaffoteaux boilers use a mix of numbered codes and light or status indications. Codes for 41 of these models are taken directly from the manufacturer's own service or installation manual.

Models covered: Britony II 30FF, Britony II 40FF, Britony II 50FF, Calydra 23 Green, Calydra 24 Green, Celtic 24 HE, Talia Green System, Calydra Comfort 100, Celtic 2 24 Rsc, 80/100, Corvec 28 OF BF, Flexiflame 140, Minima HE, Sterling FF, Britony Duo 55, Duo, System 40 60, Minima MX2 24FF / 30FF, Challenger 50 OF, Britony Flexiflue, Britony Combi SE 100, Britony Combi SE 80, Britony System 2 100, Britony System 2 80, Britony 2T, Calydra Comfort 80, Centora Green 24, Centora Green 30, Calydra 100, Calydra 80, Combi 100, Combi 80, Minima HE System 24, Minima HE System 30, System 60, Centora Green System 24, Centora Green System 30, Challenger 30bf, Challenger 30of, Challenger 30ff, Challenger 40bf, Challenger 50ff.

Codes that appear on the most Chaffoteaux models:

12 01 05 06 10 03

Just want the most common Chaffoteaux problems?

The top 8 faults across the whole Chaffoteaux range — causes, DIY checks, repair costs.

Most serious

High-severity Chaffoteaux fault codes

WATER TEMPERATURE

Your boiler is struggling to heat your hot water properly, usually because the water is flowing through it too quickly for it to warm up or because the gas supply is restricted.

Britony II 30FF

BURNER STAYS ON

Your boiler's internal burner is failing to switch off even when you are not using hot water or heating, which suggests a mechanical component is stuck or blocked.

Britony II 30FF

HEATING BODY NOISE

Your boiler is making loud banging or kettling noises because of a buildup of limescale or poor water circulation, which is causing parts to overheat.

Britony II 30FF

INSUFFICIENT WATER FLOW

Your boiler is struggling to detect the flow of water necessary to ignite and provide you with heating or hot water.

Britony II 30FF

POOR PILOT FLAME

Your boiler is struggling to keep its small starter flame lit, so it has safely shut down to prevent gas from building up.

Britony II 30FF

All models

Chaffoteaux Boiler Fault Codes

Chaffoteaux fault codes on this site

High-severity Chaffoteaux fault codes

42 Chaffoteaux boiler models

Avoid the next call-out bill