Recent content by Ness17

Update: If I turn off the DHW on the programmer then the CH fires up and runs as expected. The moment you turn the DHW back on the CH goes off again??

So I have a Potterton Promax HE boiler, I have not used the CH all summer; the boiler has worked fine all summer for the DHW. Now it’s getting colder I went to put the CH on and for some reason it doesn’t work. When the selector switch is on CH & DHW the LED does not come on for CH but it does...