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Hi Guys, Many thanks for all your help. I decided it was too much trouble to try to repair the old actuator (ACT322) and to just to buy a new one. I got the new actuator from Heating Controls Online (http://www.heatingcontrolsonline.co.uk) for a total of £41.60 (inc. Postage & VAT). I know...

Hi Guys, I have a Potterton heating system in my house with 9 radiators (without TRV’s) scattered around the house. All of a sudden last week the CH completely stopped working and the HW was scalding hot. The CH pump was working ok and I could feel the hot water circulating through it but...