Fagor feb20 caravan shower issue

[anthonyshort00]

Hi my Fagor feb20 only has shower issue when turning on cold water the boiler randomly trips out otherwise runs hot as, I’ve fitted a non return valve to the hot side helped it a little happens even with shower head disconnected but dosnt happen on any other taps with hot and cold running together I was told cold pressure may be to high reducing the boiler flow any advice much appreciated, what resistance should a dhw thermistor be?

 

[Harry Bloomfield]

what resistance should a dhw thermistor be?

That depends upon the thermistor model, but the most commonly used thermistor is should measure 10K, at 20C.

 

[anthonyshort00]

Just find it odd how only cuts boiler off with shower and not any of the other 3 sinks even if the shower head is removed the boiler still shuts down