Potterton electronic programmer: help!

6 Dec 2008
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United Kingdom
I have a Potterton EP2002 electronic programmer. The problem is that it heats the water but fails to 'engage' the central heating - either when manually switch on or on the timer.
I wonder if I should simply get a replacement programmer or is the problem more deep rooted and the boiler etc should be investigated (although it was only just serviced a month or so ago).
Ideally I would like to sort this out myself without calling someone out. So any ideas or help gratefully received.
Many thanks!
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Could be a 3 port valve or 2 port valve sticking. Depends on what you have.

Hopefully someone more experienced than me will be able to help you.
if you're tempted to just throw a prog at it i would indeed suggest getting someone in... on reccomendation. if no reccomendation, then just go for bg.

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