B
boydell
Hello All,
My old Combi is playing up again (been OK since I replaced the diverter valve complete 3 years ago), not for the usual failed diaphragm, but for a small leak behind the diaphragm chamber.
Having said that the symptoms are the same ie; central heating OK but no DHW.
I jumped in armed with a Giannoni diaphragm only to find the old one was in reasonable condition. I fitted the new one whilst I was at it anyway only to find no improvement.
After some head scratching I can see that the new spindle is not as far out as it should be in the CH position, and therefore does not reach the micro switches when a hot tap is turned on (just like a defective diaphragm!). The domestic cold water pressure is good (the hot water tap pressure when on is just about equal to the cold.
I have a nagging doubt about generic replacement parts quality (BES LTD were my source for the valve complete).
Have I missed something obvious? Can some kind soul point me in the right direction please?
regards,
boydell.
My old Combi is playing up again (been OK since I replaced the diverter valve complete 3 years ago), not for the usual failed diaphragm, but for a small leak behind the diaphragm chamber.
Having said that the symptoms are the same ie; central heating OK but no DHW.
I jumped in armed with a Giannoni diaphragm only to find the old one was in reasonable condition. I fitted the new one whilst I was at it anyway only to find no improvement.
After some head scratching I can see that the new spindle is not as far out as it should be in the CH position, and therefore does not reach the micro switches when a hot tap is turned on (just like a defective diaphragm!). The domestic cold water pressure is good (the hot water tap pressure when on is just about equal to the cold.
I have a nagging doubt about generic replacement parts quality (BES LTD were my source for the valve complete).
Have I missed something obvious? Can some kind soul point me in the right direction please?
regards,
boydell.
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