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home Fix label Heating label_important Home Heating Systems category Potterton

my potterton wont switch of on the timer?

My potterton heating system is on a timer but it wont now swith off. The timer controls are working correctly. I have had to switch it off at the bolier. Does any one have any idea why?
s Law, March 2009
home Fix label Heating label_important Home Heating Systems category Pottertondone
it will have y plan or zone valves fitted on heating system which have switches inside which stick in the on posisition telling boiler to fire even when there is no demand

craig bg, March 2009
Some boilers are installed with a frost-stat (often in a garage) that overrides the programmer - to stop the pipes freezing in cold weather. If you have a frost stat it may be defective - been bumped by something perhaps.

Just guessing...

Peccavi, March 2009
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