Hi guys,
I've recently had a boiler repair (https://www.diynot.com/diy/threads/leaking-potterton-promax-he.495649/#post-4069085)
It was a leaking O-Ring on the flow switch. BUT, the Baxi repair guy unfortunately flooded the kitchen, boiler, and himself while draining the system, which subsequently led the boiler to not work after the O-Ring was replaced, so in the end he replaced:
- flow switch
- 2 x PCBs
- 3 x electrodes
- gas valve (where the main gas comes in)
- fan under the combustion chamber
- full wiring loom
That eventually got the boiler going, until it went off, and it wouldn't fire back up. He needed to return and found an electrode wire shorting to the case. He fixed this and it has been working ok since, but not perfect.
I realised that the house takes longer to get warm, so sat with the boiler a while, and noticed that the boiler turns off, even though the thermostat is calling. But then it will fire back up for 5-10 minutes and then go back off again.
So something seems to be tripping like an overtemp, but then sorting itself out.
Do you have any idea what it could be?
- I have checked the circulation pump runs, which it does, and only seems to go off once the boiler does. There are three speed setting on the pump, it has always been on 3 (fastest) since moving in to the house, but changing these don't help.
- All valves in the airing cupboard are open
- All rads have been bled
Is there anything else I could try before asking Baxi back, as he didn't really seem to know what he was doing, and I'd like to try/test things myself if possible?
He was in the airing cupboard, but I'm not sure what he would have done in there other than depressurise the central heating and refill.
Thanks a lot
I've recently had a boiler repair (https://www.diynot.com/diy/threads/leaking-potterton-promax-he.495649/#post-4069085)
It was a leaking O-Ring on the flow switch. BUT, the Baxi repair guy unfortunately flooded the kitchen, boiler, and himself while draining the system, which subsequently led the boiler to not work after the O-Ring was replaced, so in the end he replaced:
- flow switch
- 2 x PCBs
- 3 x electrodes
- gas valve (where the main gas comes in)
- fan under the combustion chamber
- full wiring loom
That eventually got the boiler going, until it went off, and it wouldn't fire back up. He needed to return and found an electrode wire shorting to the case. He fixed this and it has been working ok since, but not perfect.
I realised that the house takes longer to get warm, so sat with the boiler a while, and noticed that the boiler turns off, even though the thermostat is calling. But then it will fire back up for 5-10 minutes and then go back off again.
So something seems to be tripping like an overtemp, but then sorting itself out.
Do you have any idea what it could be?
- I have checked the circulation pump runs, which it does, and only seems to go off once the boiler does. There are three speed setting on the pump, it has always been on 3 (fastest) since moving in to the house, but changing these don't help.
- All valves in the airing cupboard are open
- All rads have been bled
Is there anything else I could try before asking Baxi back, as he didn't really seem to know what he was doing, and I'd like to try/test things myself if possible?
He was in the airing cupboard, but I'm not sure what he would have done in there other than depressurise the central heating and refill.
Thanks a lot