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where is this sensor located. i can only see 2 on this boiler. the dhw one with the 2 green wires and the c/h one with the 2 red wires.

here now. The tap light actually flashes (which i think is what should happen as it goes into preheat mode) But it appears stuck in this mode on either dhw or heating. I'm thinking the whole diverter valve assembly needs replacing.

thanks tony. Is that the "pink" assembly which "390" fastens to? the dhw assembly that fastens to this (which is a new part) is working. When tap is opened the pin comes out and makes contact with the microswitch. Steve Tony. would it cause the symptoms that her combi is showing. Firing...

maybe more responses in the morning

Thanks. I'll pick up a couple of new microswitches in the morning. Anything else other than "fused" microswitches that would cause this problem. And would a fused microswitch prevent the dv motor from working?? Steve

removed the d/v motor and ran the hot tap. Then i switched the panel selector switch to ch&dhw. Boiler fired up on full rate and tap led lit up on panel. Pushed the pin down and could hear a slight change of flow. However, hot water pipe stayed cold and heating pipe got hot. Whatever i do...

corgis must be at the pub :lol: any "sober" potterton experts?? Steve

Thanks for the diagram. Going by it, "390" has been replaced like for like. The old assembly has been left so i could identify it. On "390" is a microswitch with black/white wires. Removing this and turn on the hot tap and the pin comes out. Bottom pin on "102" also comes out. pump spins and...

Hi. I'm a friend of Karens and also a plumber by trade. However, i dont repair boilers or combis. She called me this evening about the combi. Today a guy came out to fix the problem with warm water. He has replaced the DHW assembly and also the diaphragm on the assembly below(microswitch...

Thanks Tony. Just finished doing what you asked. The boiler does fire up on hot water (lukewarm) with the heating off. What i have just noticed whilst letting the hot water run is that the heating pipe and kitchen radiator is getting warm as well. Karen

Now now - boys. Settle down. Thanks Tony. My central heating was working fine this morning. I've just put it on again and all my radiators are getting hot. I have just turned on the hot tap. The flame inside the boiler went higher but only warm water out. So, does this seem like its...

hello. Can any of you guys help me I'm only getting lukewarm water from my boiler. The manual says that it is a "Potterton Performa 24i HE". If i turn the tap down then i can get the water a little warmer but mostly its staying lukewarm. I know i'm probably going to have to get a...