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Mend Potterton Puma Hot Water

problem with potterton puma 80?

when you first turn on the hot water tap it comes out at normal speed then slows down & speeds up it does this on and of about three or four times then it flows normally and is heating the water ok the water pressure to the boiler is ok & the pressure guage is at 1.5 bar can you help thanks !

john
August 2007
it is doing it more and more it keeps going slow then normal on and of throughout having a shower very annoying !

john
August 2007
the puma has a wax stat that controls the flow of hot water, you will not get full flow until the water has started to heat. The reason it comes through fast to stat with is because if it has been left for a while the pilot light will warm the water in the boiler, if it has just been used the heat exchange will still be hot so it will start fast.
If the boiler is slow to fire, the water will slow to allow heat to build up and the wax stat heats up.

gary.wright53@googlemail.com
August 2007
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