I have this strange issue where my boiler shows a D letter and burner light is constantly on. I can hear the burner noise and central heating is not working since boiler never gets a break from filling the request of hot water demand.
The boiler was installed in early 2014 and serviced regularly. Around a month ago, the boiler had its heat exchanger replaced.
Does anyone have any idea what this could be? I have called gas certified engineer to come and have a look but he is too busy so not sure when he will turn up. Just wanted to see if I can get it to be fixed temporarily or does this sound like some part need repairing/replacing?
The boiler was installed in early 2014 and serviced regularly. Around a month ago, the boiler had its heat exchanger replaced.
Does anyone have any idea what this could be? I have called gas certified engineer to come and have a look but he is too busy so not sure when he will turn up. Just wanted to see if I can get it to be fixed temporarily or does this sound like some part need repairing/replacing?