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I’ve got a Potterton 12SL Promax condensing CH boiler, It would be great if someone could give me some advice to resolve this problem, I was having problems with the boiler where I was getting the Dry-Fire warning lights on the fault finding. I’ve recently changed out the flow switch as well...

Hi, I’m seeking some advice on a problem that’s occurred with my Potterton Promax 12 SL boiler, the problem is intermittent. It comes on in the morning for a few hours. Then when it’s up to temperature it goes off & won’t come back on till the next day. It doesn’t come on in the evening or for a...