BoilerFaultCodes
Atag Boiler Fault Codes
427 fault codes across 13 Atag boiler models — explained in plain English.
Dutch premium heating manufacturer. High efficiency products for the UK market.
Just want the most common Atag problems?
The top 8 faults across the whole Atag range — causes, DIY checks, repair costs.
High-severity Atag fault codes
117 118 117 118 117
Your boiler has detected that the water pressure inside the system is far too high, causing it to shut down for safety.
iC & iS
Your boiler has detected that the water pressure is too low for it to operate safely, or it is struggling to move water through the system.
iC & iS
Your boiler has detected that the water pressure inside the system is far too high, causing it to shut down for safety.
iC Economiser 25
Your boiler has detected that the water pressure is too low for it to operate safely, or it is struggling to move water through the system.
iC Economiser 25
Your boiler has detected that the water pressure inside the system is far too high, causing it to shut down for safety.
iC Economiser 30
All models
13 Atag boiler models
iC & iS
CombiSystem
iC Economiser 25
Combi
iC Economiser 30
Combi
Q 25CR
Combi Discontinued
Q 30CR
Combi Discontinued
S 25CR
System
E22c
Combi Discontinued
Premier
Combi Discontinued
Q 25S
System Discontinued
A200
Combi Discontinued
E Range
Combi Discontinued
E32S
System Discontinued
Sov.
System Discontinued