I am trying to hook up a 3 wire (red,green, and white) thermostat. The old thermostat was an automag mercury type that says r+b heat only. All three wires where hooked up. I installed and now my heat will not shut off upstairs. I have 4 zones. I used same thermostat downstairs. Seems to be working...

Had a new condensing boiler fitted a few weeks ago. Water fine heating fine down stairs but up stairs not good. What is the problem.

I have 2 problem with a gas hot water boiler. Some of the radiators are not getting hot and the when the space temperature is satisfy the boiler does not come back on. I need To push in a reset button in order for the boiler to come on again.

I need to know why my gas boiler doesn't light. The pilot is lit but it will notstart?

Why does my Gas boiler say low pressure ?