Recent content by chris71

Hi I have a very loud sound coming from the hot water it sounds like a fog horn. It seems to start when someone is running a hot tap and goes on for about 20 secondsa before going quiet. I have tried to trace it but by the time I get up to where I think its coming from the noise stops...

Finally got chance to test things with a meter. When the heating switched on the grey wire shows around 240Vac but nothing on the white or orange. Only supply to orange when water switches on then heating comes on but still nothing on the white.

But before this problem appeared I could run the heating without the hot water having to be switched on. The boiler used to fire up all the time when the thermostat clicked in (even when just on heating alone) but now will only fire up when hot water on. ChrisR, I have a meter so will try...

Yes its a 3 port valve. It should be wired correctly as its been working ok but now doesnt and no one has touched the wiring since installed. Thanks for the help so far Can I fix it myself?

I have a Potterton Suprima 50 and my heating only works if the hot water is on. If I switch off the hot water the heating wont fire up at all. What would be causing the heating to not work independently from the hot water? Any help much appreciated