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here is a brief gide of common fault codes for the vaillant ecotec range of boilers .

the most common fault codes are

f22 low water pressure = action top up water pressure if problem returns book us for a service.

f28 ignition failure = ensure the gas has not been turned off reset the boiler if the code returns contact us.

f75 faulty water pressure sensor or pump or blockage = reset water pressure to 1.5 bar reset boiler if fault returns contact us for a visit.

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