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Mend Chaffoteaux et Maury PP Central Heating Thermostat Fault

Which thremostate has gone?

I have a Sterlinig PP combi boiler (Chaffoteaux et Maury) and it sipply will not switch off when on the central heating side. When I turn the hot water tap on it's red hot straight away but as soon as I turn the hot tap off the boiler carry's on working even with the room stat on zero. The only way I can turn it off is simply switch the boiler off.

Dave Tippett.
November 2007
Chaffoteaux et MauryChaffoteaux et Maury PPHeating, Home Heating SystemsCentral Heating Thermostat Fault
Solved the problem, the micro switch's had failed so I changed them and the boiler is working fine now. Thanks for the reply's.

Dave Tippett
December 2007
diverter valve is stuck

craig, plymouth
December 2007

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Chaffoteaux Maury Boiler Stuck On - Help!