Hi all. Looking for your opinion on this please…
Large house with Worcester 40CDi system boiler, UFH downstairs, 9 rads/towel warmers upstairs. Pressure normally around 1.5 bar, goes up to ~1.7 when system hot, so all normal stuff.
A week ago, pressure starts varying between 1 bar when cold and 3+ bar when hot. Also seems like boiler is short cycling more than normal, but could just be the weather has turned recently, with individual UFH zones calling for heat when CH and DHW are off, so low load and 40CDi is not great at modulation. Although I don’t remember it doing that before. Anyway, all rads bled, so seems like an EV problem. Gave the (external) EV valve a quick push and air comes out, so looks like it needs recharging rather than replacing.
I have boiler/heating insurance so rather than do this myself, I requested a call-out. I appreciate some on here have issues with those British Gas call-out style guys and I know charging an EV is standard stuff, but I didn’t want to start mucking around in case it was more complex and then the insurance would refuse to cover it if I’d had a go, etc.
So, guy comes out, nice guy, checks EV pressure, it’s virtually zero, so he charges it and leaves. Slightly concerned as he dropped the system pressure by draining through the PRV rather than doing it properly, so not a good start.
The next day, the problem is back, although between ~0.8 bar and ~2.5 bar, so slightly less variation. Again, possibly still EV issue where it’s not holding the charge.
Insurance offered to send someone else out. Different nice guy. Has a look and says the EV is still charged and it’s just air in system. Although he didn’t drop the pressure, so not sure how he knew EV was correctly pressurised. Says he bled 1 bar from the rads and 1.5 bar from the DHW AAV and quickly left saying to just keep an eye on it. Except he didn’t do what he said, as I was with him when he bled the rads and there was literally no air in them at all, let alone 1 bar! I wasn’t with him when he undid the AAV cap, so no idea if that was true. He was already running 3+ hours late and presumably wanted to get away without properly investigating which would have been a much bigger job.
Unsurprisingly, exactly the same issue after he left. I guess some insurance guys don’t really care if they don’t properly fix a breakdown, as long as they can say the property has heating that (kinda) works at the time they left.
Any thoughts on what this could be or any advice here please?
Large house with Worcester 40CDi system boiler, UFH downstairs, 9 rads/towel warmers upstairs. Pressure normally around 1.5 bar, goes up to ~1.7 when system hot, so all normal stuff.
A week ago, pressure starts varying between 1 bar when cold and 3+ bar when hot. Also seems like boiler is short cycling more than normal, but could just be the weather has turned recently, with individual UFH zones calling for heat when CH and DHW are off, so low load and 40CDi is not great at modulation. Although I don’t remember it doing that before. Anyway, all rads bled, so seems like an EV problem. Gave the (external) EV valve a quick push and air comes out, so looks like it needs recharging rather than replacing.
I have boiler/heating insurance so rather than do this myself, I requested a call-out. I appreciate some on here have issues with those British Gas call-out style guys and I know charging an EV is standard stuff, but I didn’t want to start mucking around in case it was more complex and then the insurance would refuse to cover it if I’d had a go, etc.
So, guy comes out, nice guy, checks EV pressure, it’s virtually zero, so he charges it and leaves. Slightly concerned as he dropped the system pressure by draining through the PRV rather than doing it properly, so not a good start.
The next day, the problem is back, although between ~0.8 bar and ~2.5 bar, so slightly less variation. Again, possibly still EV issue where it’s not holding the charge.
Insurance offered to send someone else out. Different nice guy. Has a look and says the EV is still charged and it’s just air in system. Although he didn’t drop the pressure, so not sure how he knew EV was correctly pressurised. Says he bled 1 bar from the rads and 1.5 bar from the DHW AAV and quickly left saying to just keep an eye on it. Except he didn’t do what he said, as I was with him when he bled the rads and there was literally no air in them at all, let alone 1 bar! I wasn’t with him when he undid the AAV cap, so no idea if that was true. He was already running 3+ hours late and presumably wanted to get away without properly investigating which would have been a much bigger job.
Unsurprisingly, exactly the same issue after he left. I guess some insurance guys don’t really care if they don’t properly fix a breakdown, as long as they can say the property has heating that (kinda) works at the time they left.
Any thoughts on what this could be or any advice here please?
