Potterton ep2002 Central Heating always on

16 Sep 2010
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United Kingdom
Hi there guys,

Just moved into a house with a potterton ep2002 controller controlling the HW and CH.

My hot water is set on timed and the Central Heating on all of the time (controlled by potterton stat).

The problem I am having is that when the stat drops below temperature and kicks the heating in, even when the stat gets back to its 'reached' temperature the heating stays on! Hence the house getting warmer and warmer.

The only way I have found to turn this off is to do a reset on the controller, then the whole process repeats itself all over again.

I have read a few posts on this same issue and was wondering if anyone had a definitive answer as to whether it is the ep2002 that requires changing?

Any help is much appreciated
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You need to describe the other controls on the system.It sounds like you have a Potterton Ptt room stat as these have a reached light on them.What's in the airing cupboard ie pump zone valves cylinder stat etc.

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