My central heating comes on when programmed am or pm. Boiler fires up, pump can be heard and radiators heat up as expected.
However, if CH alone is selected on control unit ( it lights up) but the boiler does not fire up, pump cannot be be heard and radiators remain cold. Moving temp up on hall thermostat makes no difference.
Once I select HW also on control unit, the heating then comes on....boiler fires up etc.
I suspect my control unit is faulty: Potterton EP2002.
Can anyone advise? ...thank you
However, if CH alone is selected on control unit ( it lights up) but the boiler does not fire up, pump cannot be be heard and radiators remain cold. Moving temp up on hall thermostat makes no difference.
Once I select HW also on control unit, the heating then comes on....boiler fires up etc.
I suspect my control unit is faulty: Potterton EP2002.
Can anyone advise? ...thank you