Vaillant F75 pressure sensor errors

[spile]

Pressure sensor needs replacement again after three F75 faults in a month. All cleared by using the ignition button but I’m getting to the stage where I may be simply replacing my pre-2010 Ecotec. A poor 10 year history of reliability - four pressure sensors, a heat exchanger, o rings and diverted valves. I’m on first name terms with the engineer . I understand newer Vaillants are more reliable but my experience with the Ecotec had put me off. Worcester Bosch?

 

[Stuckinarut]

Are you sure it’s the pressure sensor? IME if it’s the sensor, then it’s down to a dirty system. We have literally hundreds of these boilers on our patch in social housing, some have the sensor replaced often, others have had the original orange one. Whenever I changed one I look to see how blocked it is, and they’re usually full. You can’t go blaming the boiler for doing it’s job if the system is dirty.