Recent content by helpmeout

Whilst investigating the dhw switch on the end of the diverter valve again I think I may have inadvertantly stumbled across the original problem and simultaneously (possibly) discovered another. As I was removing the dhw switch I could here a relay clicking in and out as I disturbed the...

Thanks for the help so far. Latest update, zone valves seem to be fine, are not sticking and test meter checks electrics out OK, so as advised am focusing back on DHW switch/probe. Just left of centre there is a microswitch in a black plastic box on the end of the diverter valve, and below it...

Not sure if this will clarify further but as I understand the boiler was installed (professionally for the previous owner about 6 years ago) to supply two radiator circuits controlled by a stand alone Drayton programmable controller (the timer on the boiler itself is not being used). One channel...

Recently my Ariston 27MFFI has started to supply heating to the radiators when not required, even when the programmer is completely removed! The boiler periodically fires and heats up the water in the heating outlet pipe to a very high temperature. Some of this heat is reaching the radiators...