Hi there,
My sx20 mmfi ce has had the above problem for a while. When a hot tap is operated the switches are activated, but the boiler does not respond. Also, when using the shower, i have to run the basin tap to keep hot water flowing!
I have changed the diverter valve diaphragm 2 years ago and the PCB 1 year ago.
In the last few days, my missus went away, so i decided to do a little tinkering to solve the problem(s). I gave it a de-scale, found i needed to replace the expansion vessel, checked the diaphragm, and managed to remove and de-scale the heat exchanger. Lots of expletives were released.
To my dismay, i found nothing too wrong. A bit of scale and black sludge in the HE and loads in the EV, but the diaphragm was in perfect nick.
Other than the PCB, what else could be wrong? Cheers in advance.
My sx20 mmfi ce has had the above problem for a while. When a hot tap is operated the switches are activated, but the boiler does not respond. Also, when using the shower, i have to run the basin tap to keep hot water flowing!
I have changed the diverter valve diaphragm 2 years ago and the PCB 1 year ago.
In the last few days, my missus went away, so i decided to do a little tinkering to solve the problem(s). I gave it a de-scale, found i needed to replace the expansion vessel, checked the diaphragm, and managed to remove and de-scale the heat exchanger. Lots of expletives were released.
To my dismay, i found nothing too wrong. A bit of scale and black sludge in the HE and loads in the EV, but the diaphragm was in perfect nick.
Other than the PCB, what else could be wrong? Cheers in advance.