First post so please go gentle on me.
I have been thinking of asking gurus here what could be causing my Potterton Performa to cycle between hot and cold shower. I mean it starts cold and when we let the water run for a while in a minute or so it gets warm and then again goes cold, this cycle continues.
I did some diagnosis myself and found out that the pin which sticks out to turn on the microswitch when hot tap runs doesn't come out if we open tap a bit, it only starts coming out when we fully open the tap and by then water starts splashing due to excessive pressure. Pin is hesitant to come out for some reason. I thought this could usual diaphragm and replaced it myself, old diaphragm was in good condition and it didn't help at all, problem still continues.
As this problem has been going on for a while we have found a workaround, which is to turn the heating on. When we turn the heating on, other pin easily comes out and turns the switch on with no hesitation. This is kind of workaround we have been living with for a while now. I wish I can get to bottom of this. Can someone please advise what could be wrong here and if there is easy fix.
I have been thinking of asking gurus here what could be causing my Potterton Performa to cycle between hot and cold shower. I mean it starts cold and when we let the water run for a while in a minute or so it gets warm and then again goes cold, this cycle continues.
I did some diagnosis myself and found out that the pin which sticks out to turn on the microswitch when hot tap runs doesn't come out if we open tap a bit, it only starts coming out when we fully open the tap and by then water starts splashing due to excessive pressure. Pin is hesitant to come out for some reason. I thought this could usual diaphragm and replaced it myself, old diaphragm was in good condition and it didn't help at all, problem still continues.
As this problem has been going on for a while we have found a workaround, which is to turn the heating on. When we turn the heating on, other pin easily comes out and turns the switch on with no hesitation. This is kind of workaround we have been living with for a while now. I wish I can get to bottom of this. Can someone please advise what could be wrong here and if there is easy fix.