Hi Guys,
Many thanks for all your help. I did try to resolder the R1 and R2 resisters but the erratic cycling of the boiler continued. As a couple of the relays were slightly burt I bit the bullet and purchased a new PCB.
Installed without difficulty and has been great since.
Once again...
Hi All,
Thanks guys for getting back, if i can add this one for all.
I do have drayton TRV's on all but two rads (furthest away, foye) for safety.
I will try the shut all down method to get the balance right.
Just to add also on my symptoms, after the boiler doing the off/on cycle for...
Hi Chris,
Thanks for that.
This was replaced last year with a 'not a potterton part, but does the same job' (plumbers words) air vent. It is totaly enclosed with a black plastic screw. This has been loose all the time. I loosened its compression nut and hot water flowed out.
Should this...
Hi All,
After changing the bypass valve due to leaking, the boiler is having weird noises and activities. Here are the circle of events:
Problem
1. CH kicks in, pumps comes on, burner fires up.
2. After about 1min hissing/small bubbling noises come from the heat exchanger then approx 10secs...