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potterton 2001?

When I put the HW on contant the radiators come on even if the CH is turned to off - Help
coldwater, September 2008
I had similar problems and changing the diverter valve to a decent qualitry valve (Honeywell) sorted it out. A fairly straightforward DIY job once you've drainied the system down.

Note that some Potterton boilers around that time appered to suffer with with their PCBs. Potteron now offer a replacement kit - for about £230...

Good luck.

rustifish, September 2008
link Click here to see other fixes for Potterton 2001.