potterton puma 80

Joined
2 Oct 2007
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Location
Liverpool
Country
United Kingdom
My 9 year old potterton has developed a prolem with the hot water supply. The heating is working fine but every time I draw hot water and then close the tap the boiler makes a horrendous noise and then locks out. Any suggestions, thanks
 
The answer to this is posted twice a week!

The hot water demand switch is sticking on after DHW usage!

Tony
 

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