Hi
I have a potterton suprima boiler, when the thermostat in the hall swiches the heating on the light comes on on the 3 point valve and the motorised arm indicates the valve has moved and the heating comes on as it should
but when the house is at desired temp the thermostat switches off, the light goes off on the 3 point valve but the motorised arm doesnt move so heating stays on
If i power off the boiler circuit the motorised valve moves and the heating goes off
this is the only way i can turn the heating OFF
on is ok
I did remove the 3 point valve and turned thermostat on/off several times watching the motor move
Im not sure if i need to replace the boiler curcuit board or the 3 point valve, not convinced its the 3 point valve as this works when its in my hand
any ideas
I have a potterton suprima boiler, when the thermostat in the hall swiches the heating on the light comes on on the 3 point valve and the motorised arm indicates the valve has moved and the heating comes on as it should
but when the house is at desired temp the thermostat switches off, the light goes off on the 3 point valve but the motorised arm doesnt move so heating stays on
If i power off the boiler circuit the motorised valve moves and the heating goes off
this is the only way i can turn the heating OFF
on is ok
I did remove the 3 point valve and turned thermostat on/off several times watching the motor move
Im not sure if i need to replace the boiler curcuit board or the 3 point valve, not convinced its the 3 point valve as this works when its in my hand
any ideas