Potterton Puma 80 hot water prob

[murphy4869]

Hi all,

My shower has started to go intermitingly cold whilst in use and takes a long time to return to hot which is slightly annoying to say the least.

This happens when no other taps/washing machine/dishwashers in the house are being used.

Shower is fed from a Potterton Puma 80 Combi boiler. CH is fine.

Any ideas of what has gone wrong here only started happening within the last month?

Thanks

 

[holty]

might be wrong on this .but pretty sure its the one with the wax capsual on the divertor valve. if so it sounds as though this is a fault.

 

[murphy4869]

thanks holty I will check this. Much appriciated

 

[holty]

think i jumped in to soon with the answer. forgot to ask, is all hot water in the house like this. if not, wot shower do you have

 

[murphy4869]

yes all hot water in the house is like this. It's just a mixer shower fed direct from the combi boiler.

 

[Agile]

Its less likely to be the diverter valve. If thats failing it usually gives a problem getting CH.

Could be a problem with the DHW flow demand switch or the temperature control system.

Might need a competent boiler engineer to diagnose.

Tony

 

[ChrisR]

I'd agree, there's a few things which could be causing or contributing to the problem, but nothing particularly typical for this boiler which exactly fit the symptoms described.
To be sure of fixing it , one would have to be in front of the boiler while it's exhibiting the fault.