My boiler is a wall hung Thermecom oil boiler. the central heating is controlled by digistat RF 1 wireless system. About 3 weeks ago the central heating was switching on and off irregularly.I suspected the fault was the due to the RF 1 transmitter and change the batteries but this had no effect.
A visiting Heating Engineer replaced a BMPV 3 port mid position valve yesterday. this appeared to solve the problem but today after a period of switching off and on the boiler failed to fire for heating and the overide button on the digistat receiver has no effect. The only way I can get heating for a short period is to use the manual level on the valve and increase the required water temperature. The boiler stops once this temperature is reached.
A visiting Heating Engineer replaced a BMPV 3 port mid position valve yesterday. this appeared to solve the problem but today after a period of switching off and on the boiler failed to fire for heating and the overide button on the digistat receiver has no effect. The only way I can get heating for a short period is to use the manual level on the valve and increase the required water temperature. The boiler stops once this temperature is reached.
