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Mend Valiant Ecotech Combi Boiler Fault Code Hot Water

Valiant Ecotech combi boiler?

Boiler stops firing up when we power cut. Have had British gas out, fault showing as F75. The last time the technician just turned it off and turned it on and it should reset! This is not doing this now. Why? No hot water

trevor
September 2008
ValiantValiant EcotechHeating, Home Heating SystemsCombi Boiler Fault Code Hot Water
i agree with andyo, its def switch related due to sh*te and a very popular problem with this boiler

ignore this one

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iain
September 2008
FROM TOTAL BUILD AND HEAT [1] you have .A. fault on pcb bord and you need to plug in.A. FAULT FAINDER IN TO CHACK F75 +MORE ?

andy
September 2008
f75 usually indicates you have a dirty system and the water pressure switch is dirty causing the boiler to lock out. vaillant have recently re designed this switch adding a small magnet causing any magnatite(small peices of metal in the water)to stick to the switch. you need to have your system power flushed.

andyo
September 2008
f75 is boiler not recognising pressure increase from pump starting. it has pressure sensor in bottom left of boiler (under plate exchanger)(orange if its the old problematic sensor) new ones are black,

this usually clears f75 fault

iain
September 2008

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Valiant Ecotech F75 Fault - No Hot Water