potterton performa 28i problems?

when you turn on the hot water the radiators get hot
any ideas

tony
September 2009

We have of these. There is a diverter valve in the boiler that should switch between hot water and heating. It can get stuck in one or other position. The valve is difficult to get to and took the guy four hours to change.

John Smith
March 2008

Don't have the answer just similar problem. It has happened 4 times now. Just to explain:- Hot water OK but Central Heating does not come on when stat calls. Sometimes it starts working again for a day or so then stops. No faults indicated on Boiler. Replaced Stat and engineers have been out 4 times. They think they have fixed it but a month later same thing happens. Seems there could be a design fault with these boilers.

Peter
January 2008