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Hi there I was wondering what is the purpose of air flow switch and could failure of this be the reason for the fan running constantly for 5 minutes after demand for hot water or central heating is finished. Recently I have replaced the mod. PCB and the DHW flow switch and microswitch. I...

I wonder if anybody can tell me the difference between the pcb part no.21/18867 and the pcb part no. 21/18601 as I had the pcb on my combi 80 replaced by a heating engineer the origonal part was 21/18601 and he replaced it with part no. 21/18867 (this is the part no. On the box the new pcb came...

Can anybody help with info on the following ? Switching power on to the m/c & pressing start on off light flashes rapidly as does the time saver light the pump starts continually pumping. Does this indicate that the main PCB is shot completely or is there a capacitor on it that I can replace ...

I have a Potterton combi 80 that I have recently noticed the fan running continuously after the demand for hot water is finished(tap turned off) and no CH on, the fan runs for about 5 minutes and then switches off, this never used to happen. I had a new diverter valve and pump fitted in january...

Ihave several cracks in the render on my house a builder who did some work on my house inspected these cracks and said they were just superficial, my question is what is the best way to repair these cracks before I re-paint. Thanks

I am replacing old damaged floorboards in a room with T&G chipboard flooring the prolem is the chipboard is 22mm and the floorboards are 24mm, I am having to leave the old floorboards at the wall, so must pack up the difference. Does anybody have any ideas as to a 2 mm packing material? Thanks...

Central heating now working ok after a I eventually told the heating engineer that I thought the problem was the diverter valve ( after advise from people on this forum) so he replaced it, this whole episode has cost me a total of £697 £180 for the replacement pump ( experts origonal diagnosis)...

Can anybody help me, I need to get hold of a diverter valve complete assembly fast, weather getting colder and so are we

Potterton combi 80 boiler, radiators not all getting hot sometimes none getting hot, the primary flow pipe from the boiler gets very hot but the return pipe at the boiler stays cold or barely warm. Plumber called initially and he replaced the pump £180, no better so he suggested that the system...

I have recently developed problems with some of my central heating rads not getting hot. when the roomstat is calling for heat the boiler fires up and stays on for about a minute switches off for 2 or 3 minutes then fires up again and the underfloor pipework start banging like expansion noises...