CH only comes on when DHW comes on
Posted: Mon Sep 08, 2008 9:09 pm
Potterton Prima F with EP2001 control.
The DHW functions as it should.
The CH thermostat was turned down for the summer; when turned up to activate the CH, the boiler will only fire if the DHW is already on/coming on at same time as the heating.
Where the hot water is not on, the boiler makes no noises at all/no response. However the CH light iluminates on the valve and it hums/clicks quietly.
Any help greatly apreciated.
(my gut instinct is that it may be the EP2001 control not telling the boiler to fire)
The DHW functions as it should.
The CH thermostat was turned down for the summer; when turned up to activate the CH, the boiler will only fire if the DHW is already on/coming on at same time as the heating.
Where the hot water is not on, the boiler makes no noises at all/no response. However the CH light iluminates on the valve and it hums/clicks quietly.
Any help greatly apreciated.
(my gut instinct is that it may be the EP2001 control not telling the boiler to fire)