V
Viglen
My Alpha CB28 has an intermittent fault since last year. Fire it up and it'll run for anything between 10 mins and over an hour then I get a permanent A light and the one second flashing B light. The boiler gets very little use so sometimes it's OK for an hour or so sometimes not. I just power off and back on to get it up and running again. I have noticed that I'm losing pressure more rapidly than before, but not dramatically. I believe this light configuration indicates a pressure problem but can anyone help me point to a particular part or parts? I have had a good engineer look at it and he talked about the Thermistor(?) and reflating the expansion tank(?) - but unfortunately the problem didn't occur in the hour he was there! Any advice much appreciated thanks. It's 13 years old about but as I say, I've had it for 10 of those and it gets well under an hours daily use on avarage across the year - it is very clean and I've tried to look after it.
