Potterton Puma - Rads getting warm on H/W.CH off

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With CH off the radiators start to get quite warm if I am running a bath or running a tap for any length of time.Suspect diverter valve may be letting-by.I have a Potterton Puma (Combi).
Could anyone confirm this is the problem , or could it be something else??
Mike
 
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loxwood said:
With CH off the radiators start to get quite warm if I am running a bath or running a tap for any length of time.Suspect diverter valve may be letting-by.I have a Potterton Puma (Combi).
Could anyone confirm this is the problem , or could it be something else??
Mike

had this once before where the wax capsule is sticking and possibly not seating right inside the valve, full valve replacement is a pain so best to try the capsule first and make sure it seats correctly when fitting.

most common problem with these are no heat as the valve sticks in H/W position but as I said had the exact problem myself before and new capsule worked ok !
 

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