Context for issue:
Last winter the temperature switch on my boiler shorted somehow, the boiler was then running WAY too hot and ended up blowing/melting a hole in one of the pipes. I repaired this by putting in a new stretch of pipe in and just connecting it to the existing pipes with two valves. Which has successfully patched the pipe and no leaks or anything like that.
I replaced the temperature switch on the boiler also - and that seems to be operating correctly now.
Issue:
The issue now is that the radiators aren't heating up. My guess is that the water isn't circulating due to some blockage or trapped air due to the previous gaping hole in the pipework lol
The boiler kicks on and heats up, and I can feel out pipe on the hot side of the boiler heat up, but only for the first 1ft or 2ft then the pipe feels cold further along. This is what makes me think something is stopping the circulation of the water.
The obvious go to for me was check for trapped air, I started by bleeding the radiators but nothing but water was coming out, the I realised the trapped air is more likely stuck at the highest point of the system so I went to the attic and checked for an air release valve, I found one and opened it up and some air came out rapidly and then stopped. Tried the heating again and no luck.
I can't see anywhere else to bleed air from so I came to the end of my air lock thought process there.
Then I thought to myself maybe it's a pressure issue, I checked the pressure on the red expansion vessel and it was 2bar, which is above what the internet told me, so I reduce it down to about 1.25bar. There is another pressure guage in the attic near the expansion vessel but I don't know what pressure it's measuring but it's sitting just below 2bar so I figured that sounds about right.
THEN I thought maybe it's the pump, I tried to bleed it and it was just water trickling out but I didn't hear any air hissing out so its not air locked, but when I turn on the heating I don't feel a vibration or even a murmur from it so it's not actually kicking on, but the lights are on.
Lastly I opened what I assume is the water/air release valve on the top left of the boiler to see if any air was going to come out of it, a lot of water came out but I don't know if any air came out aswell because the water was hitting the side of the boiler house and making too much noise to hear for hissing air.
Help:
Does anyone have any suggestions? Or am I doing something obviously wrong?
I dont mind spending time on it, I find it all very interesting and challenging (obviously).
ANY help would be great, the cold weather is here and I'd like to stop using electric heaters.
Last winter the temperature switch on my boiler shorted somehow, the boiler was then running WAY too hot and ended up blowing/melting a hole in one of the pipes. I repaired this by putting in a new stretch of pipe in and just connecting it to the existing pipes with two valves. Which has successfully patched the pipe and no leaks or anything like that.
I replaced the temperature switch on the boiler also - and that seems to be operating correctly now.
Issue:
The issue now is that the radiators aren't heating up. My guess is that the water isn't circulating due to some blockage or trapped air due to the previous gaping hole in the pipework lol
The boiler kicks on and heats up, and I can feel out pipe on the hot side of the boiler heat up, but only for the first 1ft or 2ft then the pipe feels cold further along. This is what makes me think something is stopping the circulation of the water.
The obvious go to for me was check for trapped air, I started by bleeding the radiators but nothing but water was coming out, the I realised the trapped air is more likely stuck at the highest point of the system so I went to the attic and checked for an air release valve, I found one and opened it up and some air came out rapidly and then stopped. Tried the heating again and no luck.
I can't see anywhere else to bleed air from so I came to the end of my air lock thought process there.
Then I thought to myself maybe it's a pressure issue, I checked the pressure on the red expansion vessel and it was 2bar, which is above what the internet told me, so I reduce it down to about 1.25bar. There is another pressure guage in the attic near the expansion vessel but I don't know what pressure it's measuring but it's sitting just below 2bar so I figured that sounds about right.
THEN I thought maybe it's the pump, I tried to bleed it and it was just water trickling out but I didn't hear any air hissing out so its not air locked, but when I turn on the heating I don't feel a vibration or even a murmur from it so it's not actually kicking on, but the lights are on.
Lastly I opened what I assume is the water/air release valve on the top left of the boiler to see if any air was going to come out of it, a lot of water came out but I don't know if any air came out aswell because the water was hitting the side of the boiler house and making too much noise to hear for hissing air.
Help:
Does anyone have any suggestions? Or am I doing something obviously wrong?
I dont mind spending time on it, I find it all very interesting and challenging (obviously).
ANY help would be great, the cold weather is here and I'd like to stop using electric heaters.
