When CH is put on boiler fires up, pump works, radiators get hot. After approx 5-10 mins ( when the CH return pipe gets hot ) the boiler goes back to pilot, ie waiting for the circulating water temp to drop. After a few mins the pump stops working and then the boiler fires back up, which results in it over heating and the pressure goes upto 3 bar ( Boiler shuts down including pilot light). After approx 5 more mins the pump starts again.
Any suggestions ?
Marc
Any suggestions ?
Marc