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Ask Jerry Your Own Question
Jerry, HVAC Technician
Category: HVAC
Satisfied Customers: 422
Experience:  Epa universal certification, hearth products specialized.
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I have a Potterton Suprima 40L. The boiler will only ignite

Customer Question

I have a Potterton Suprima 40L. The boiler will only ignite when there is a demand for hot water. If the hot water tank is at temperature it will not ignite, but does if I turn the thermostat up. I can only have CH on when hot water is on. Can you help please
Submitted: 4 years ago.
Category: HVAC
Expert:  Andrew Smith replied 4 years ago.
Can you tell me if you have a motorised valve in your airing cupboard?
Customer: replied 4 years ago.

yes I have had the cover off. I can see it open and close when I operate the thermostat on the hot water tank. it also opens and closes when I operate the main thermostat

Expert:  Andrew Smith replied 4 years ago.
What does it do when you have the heating on only?
Does the valve open and then the pump and boiler kick into life?
Customer: replied 4 years ago.

with the heating demand showing on the control panel, the valve is shut.

The boiler will not light

Customer: replied 4 years ago.
Relist: Other.
I have been away so was unable to answer the experts question, it's getting a bit frustrating that it doesn't work now.
I have small children in the house and need to get the heating on