My boiler is at least 10 years old and I have never had a problem with it. Two day sago I bled a radiator (one that needs doing most winters - so no change there), and topped the water up in the boiler (it was just under 1 bar and it usually runs at 1.5 bar). Ever since there has been this problem:
When the heating is switched off, it drops to 0 bar. When on, it shoots up to 3.5-4 bar (4 bar is the maximum on my boiler). It's never done this before.
When I bled the radiator there was a lot of air in it, and quite a lot of water came out with the air. However, the water in the boiler was topped up to 1.5 bar, which I thought would sort it out. I daren't leave the heating on timer in case it goes up to /past 4 bar, and when I'm in, I can't relax as I keep having to check the pressure level.
By the way, there are no leaks.
Any advice would be more than welcome. Thank you.
When the heating is switched off, it drops to 0 bar. When on, it shoots up to 3.5-4 bar (4 bar is the maximum on my boiler). It's never done this before.
When I bled the radiator there was a lot of air in it, and quite a lot of water came out with the air. However, the water in the boiler was topped up to 1.5 bar, which I thought would sort it out. I daren't leave the heating on timer in case it goes up to /past 4 bar, and when I'm in, I can't relax as I keep having to check the pressure level.
By the way, there are no leaks.
Any advice would be more than welcome. Thank you.
