occasionally the fan remains on continuously at slow speed. I have to break the connection to stop the fan running, when I remake the connection all seems ok. Heating and Hot water are fine otherwise. any comments ? could it be a hotwater/heat sensor or air pressure switch (although if I take the air pressure switch out the fan continues to run)
puma 80 fan staying on continuously
- Thread starter superkev
- Start date
Sponsored Links
spot on !!! 
Sponsored Links
The fan has to run (at low speed) to ventilate the combustion chamber to maintain the air supply for the pilot burner and (more importantly) to cool the heat exchanger. With no cooling, the water sitting in the HX over the pilot will boil!
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
