Atmos Boiler Fault Codes

74 fault codes across 4 Atmos boiler models — explained in plain English.

Czech manufacturer specialising in wood and pellet boilers.

74 fault codes
4 models documented
0 currently sold
4 legacy models

Atmos fault codes on this site

We document 74 fault codes across 4 Atmos models, covering 29 distinct codes. Atmos boilers use plain numeric codes such as 0, 1, 2. Codes for 4 of these models are taken directly from the manufacturer's own service or installation manual. Atmos is a smaller name in the UK market, and if you own one this is likely one of the few places its fault codes are collected in one place.

Models covered: Intercombi HE32, Interopen HE22, Intersystem HE26, Intersystem HE40 C.

Codes that appear on the most Atmos models:
0 1 2 4 5 6
Just want the most common Atmos problems?
The top 8 faults across the whole Atmos range — causes, DIY checks, repair costs.
Most serious

High-severity Atmos fault codes

4
Your boiler has tried to light itself four times but failed to create a flame, causing the system to shut down for safety.
Intercombi HE32
 5
Your boiler has failed to light after several tries, often because the drainage pipe for waste water is blocked or there is a problem with the gas supply.
Intercombi HE32
 6
Your boiler is failing to sense a flame, meaning it cannot stay on safely to provide heating or hot water.
Intercombi HE32
 8
Your boiler has been forced to stop working because the internal fan is not spinning at the correct speed to safely clear waste gases.
Intercombi HE32
 10
Your boiler's internal temperature sensor has stopped sending the correct signal, which means the system cannot heat your water or radiators safely.
Intercombi HE32
All models

4 Atmos boiler models

Intercombi HE32
Combi Discontinued
19 fault codes · 2004-2018
Interopen HE22
Heat Only Discontinued
25 fault codes · 2004-2018
Intersystem HE26
System Discontinued
19 fault codes · 2004-2018
Intersystem HE40 C
System Discontinued
11 fault codes · 2004-2018
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