Boiler Mate 2000 - Calling for heat even when reached correct temperature.

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Boiler Mate 2000 - Calling for heat even when reached correct temperature.

Post  HizerKite on Sun Jul 23, 2017 3:17 pm

I have a boiler mate 2000 that is calling for heat and even when it gets to its required temperature, keeps sending switched live to the boiler - the boiler shuts down itself when it gets to its own temperature and the boiler mate keeps demanding heat hence running the boiler pump for hours.

Running a tap even for a couple of seconds seems to make the boiler mate realise it's at the correct temperature so it stops demanding heat and shortly afterwards, the boiler pump goes off (after its normal over run of a few minutes)


Last edited by HizerKite on Mon Aug 14, 2017 8:17 am; edited 11 times in total

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Re: Boiler Mate 2000 - Calling for heat even when reached correct temperature.

Post  scorp on Thu Jul 27, 2017 2:54 pm

I noticed on my system the same behaviour when temperature in tank is low. I have unusual wiring with dual timer. One for heating and another for tank, so tank is not always heated to optimal temperature. When it's temperature is low and I open hot water then pump starts but never stops. The only way to stop it is to switch off/on BM or switch on timer to heat up tank.
In your case the problem can be in thermostat on boiler, is it on maximum? When pump stuck try to check tank temperature. I can't remember what is optimal value but you can find it in user manual. Or may be tank not heated properly because boiler overheats and stops often, or pipe between boiler and tank clogged.

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