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diaphragm in flow switch was changed - plumber brought whole kit - then opened the unit, replaced diaphragm / pin and spring. (i didnt see if he put diaphragm in a particular position (dont know if this matters) but did put a new one in. .... so what now?

appreciate the advice - asked him to come back. so more questions: What do you think is the matter with the Pin no longer rising? Is it a case of new spring not mounted correct or the possible blockage having moved through circulation? He did tell me that bypassing the switch meant i...

I have a problem- ariston sx20 and a trigger happy plumber... Basically primary flow switch pin working with CH on but not with dhw alone. So Plumber attends and says switch not working correctly as pin not rising fully (although it seemed to be to me -(the untrained eye!)) So he replaced...

I have a similar problem- ariston sx20 and a trigger happy plumber... Basically primary flow switch pin working with CH on but not with dhw alone. So Plumber attends and says switch not working correctly as pin not rising fully (although it seemed to be to me -(the untrained eye!)) So he...