Hi Dave,
Thanks so much. I rechecked the microswitches & thermistors. The DHW thermistor was reading much too high, and on closer inspection it was leaking slightly which had caused corrosion. If I put an 11kohm resistor across then the hot water fires up fine. And the new thermistor will...
Hi All,
I'd be v grateful for your advice.
My Alpha 240E has stopped giving hot water. Its been flakey for a while but seemed to work if the heating was on for 5 mins beforehand. Now it hardly ever fires up and when it does it turns off again after a few secs.
Looking at...