Recent content by entee

Reporting back as promised.... On the basis that two swallows don't make a summer, we have so far enjoy two programmed "switch-off" events, so it appears the microswitch was sticking in the on position, albeit intermittently. Checking the microswitch on the removed HPA2 shows it working but...

Yes, looking at the circuit diagram the live can only go through the 2 microswitches - operating singly or together. One of them is definitely 'on' when it shouldn't be, albeit intermittently. As a test I have swapped out the oldest HPA2 for a new one [CH]. Of course live testing won't make...

Both valves always return to the self-settling power-off closed position so I guess it is looking like it might be the boiler PCB - argh! I was hoping it was the controller because it is a 2 minute swap out! Incidentally the Classic is an SE24 FF Thank you so much for your wise guidance.

Thanks for getting back so quickly! There is no electrical room thermostat for heating and this system relies upon individual thermostatic valves for room temperature control. Turning down the hot water cylinder thermostat when running in HW only mode made no difference, neither does manually...

Hi, A bit of a strange request… I have a FP715 which is controlling a pair of HPA2 valves. In the past, despite both valves working fine, the ‘pump’ microswitches have failed closed and kept the pump running. Determining the culprit by manually operating the valves showed which one was duff...