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How can I fix my vaillant boiler showing f75?

what do I do my boiler has stopped working showing a f75 code. Vaillant eco boiler. pressure is good. The boiler is 18 months old.

Craig Cox
March 2011
VaillantVaillant ecoHeating, Home Heating SystemsVaillant Boiler Showing
If the pressure is good and the system is clean, it will be either the CH pressure sensor or the pump.

Call Vaillant, the boiler has a two year guarantee.

Carefree
March 2011
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