Recent content by RobertLeigh

Thank you. I checked the light as you advised (mine is a hall effect sensor) and it stays solid red, so that's narrowed the 'possible fault' list a bit further. I'll report back when I finally find the issue, it's looking like the PCB.

I have a Potterton Heatmax combi 28 HE that goes through short 5 sec cycles of the burner being lit then shutting off when using DHW. The CH works fine. The DHW is being tested with a single hot tap (not a mixer). The short spurts of burning is just enough to produce luke warm water. I...