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Vaillant — ecoTEC Pro
Select a fault code
Fault Codes
F.22Low water pressure🔄 Try Reset
System pressure below minimum.
F.28Ignition failure🔄 Try Reset
Boiler failed to ignite after three attempts.
F.29Flame loss🔄 Try Reset
Flame established but went out during operation.
F.57Comfort mode fault🔄 Try Reset
A fault with the comfort mode (pre-heating) function.
F.75Pump/pressure fault🔧 Engineer Required
No pressure change detected on startup.
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