NO HOT WATER FROM BOILER

[StEpHeN 321]

CAN ANYONE HELP
I HAVE A VOKERA EXCELL SP 80 WHICH IS NOT GIVING ME HOT WATER ANYMORE. WHEN THE CH CALLS FOR IT IT WORKS BUT NOT WHEN I CALL FOR HOT WATER. A FRIEND HAS TOLD ME THAT THE FLOW DIAPHRAGM WEARS OUT QUITE QUICKLY ON THESE MODELS. COULD THAT BE THE PROBLEM OR IS IT SOMETHING MORE SERIOUS. CHEERS
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Lynda, moderator

Please turn caps lock off. (Forum rule 6)

A boiler is NOT an appliance, You posted it in appliances, I have moved it)

 

[jj4091]

Yes the diaphrgms do split & have to be replaced & the needle valves they control also stick, it may be the diverter valve diaphragm that is your problem.

 

[gas4you]

I agree, change the diaphragm first, it is usually this.