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Topic - Heating/Hot water system Advice

balmybaldwin - on 29 Jan 2013
Was hoping a heating engineer/plumber could give some advice...

I've just come home to a cold house despite the heating being on, checked the thermostat, and it seems to think temp is about 12 degrees (I have it set to 18 normally)yet the boiler isn't firing (Pilot light is on) On further investigation the boiler still has some residual warmth, and the hot water tank is full of hot water.

If I turn the hot water on, the boiler fires up ok, but after a minute or so shuts down (presumably because the HW tank is full) I did notice that the HW system seems to be making more noise than normal (as if bubbles are in the system?) and when I run a hot tap it splutters to some degree (along with more noise).

I'm wondering if the problem is likely to be:

a) Room Thermostat not sending signal for more heat
b) Hot Water tank Stat not sending the signal for too much heat (thus making the boiler shut down due to overheating)
c) Some kind of leak in the system (checked round the house and can't see any signs)
d) Hot water pump not working (with the heating on I can't feel it vibrating)
e) some other problem?

Any ideas would be great

Thanks
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