Boiler fault codes
What does my boiler error code mean?
Type your code below. Each page explains the meaning, what is safe to try yourself, and when to stop and call a Gas Safe engineer.
Worcester BoschA1Pump running dry (A1 / 281)
warning
Worcester BoschC6Fan speed fault (C6 / 215)
warning
Worcester BoschCELow water pressure (CE / 207)
info
Worcester BoschE9Overheat lockout (E9 / 224)
serious
Worcester BoschEANo flame detected (EA / 227)
serious
VaillantF22Low water pressure (dry fire protection)
info
VaillantF28Ignition failure on start-up
serious
VaillantF29Flame loss during operation
serious
VaillantF62Gas valve shut-off delay
serious
VaillantF75Pump or pressure sensor fault
warning
BaxiE119Low system pressure
info
BaxiE125Primary circulation fault
serious
BaxiE133Ignition failure / gas supply
serious
BaxiE160Fan fault
warning
IdealF1Low water pressure
info
IdealF2Flame loss
serious
IdealF3Fan fault
warning
IdealL2Flame loss / ignition lockout
serious
IdealL6False flame lockout
warning
ViessmannF2Overheat
serious
ViessmannF4No flame signal
serious
Glow-wormF1Low water pressure
info
Glow-wormF4Ignition failure
serious
No match. Call us with the code and we will tell you what it means.
Safety first. Never open the boiler casing, and if you smell gas call the National Gas Emergency line on 0800 111 999 before anyone else.
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