Today we had yet another call for a Vaillant F75 repair. We received the call at half past 8 this morning from a new customer in Brentwood, Essex. As we are ourselves are based in Essex we where able to get to them nice and quickly. We always go through the same set routine with the f75 fault code. Drain the boiler down, recharge the expansion vessel, clean all the internal pipework and pump, and sensors. As the picture shows you can see that the pressure sensor in this particular boiler is the old red sensor. These have been identified as being faulty by Vaillant themselves and they have been changed. After we gave the boiler love, care and a new sensor we left with one happy boiler and a very happy customer.
