how do i fix my ariston sx20 hot water problem?

pump proving microswitch on the left of boiler near pump not making or cold water to the divertor valve could be blocked restricting the flow of mains cold water

dd
July 2008

Its only a guess, but my ariston euro combi sometimes goes cold due to a low tap setting, ie im not running enough water in the shower. It seems that i have to run it harder to get warm water. Ok hope it helps. Oh yeah, before you go the 'new pcb' route think this - 'what could go wrong on it?'. Answer could be as simple as a loosely soldered joint. I had the problem of the boiler cutting out - even during a shower, and sometimes not coming on in winter. So i thought blow this, i wiggled a wire to the pcb just the flame was refusing to light up and suddenly i got ignition. Taking the board out i found it easy just to de-solder and re-solder all suspect looking joints. My problem seemed to be that the joints were loose on the ignitor (black box). After putting it back i've had NO PROBS!

Ilya
May 2007