My Puma 100e is fitted in the garage and when the temperatue drops low enough the boiler comes on and stays on. I read the manual which says that it should run until the system water has been raised by 10C but mine just seems to run and run until i switch the power off. This happened a few weeks ago when we had a cold few days but was ok again when the weather improved. Yesterday it has started doing it again.
Do I need a new frost thermostat or is there another answer.
Thanks for your help.
Do I need a new frost thermostat or is there another answer.
Thanks for your help.