Hi.
After the issue, I've had recently and a visit from an engineer (full story below) I've got the following symptoms. On my boiler Bosch, junior 28i pressure goes all the way down to 0 bar when only hot water is in use but goes all the way up to 3 bar (and probably above) when central heating is on. Hot water has no effect on the pressure even when it's high. I don't want to use that company/engineer anymore, even though I'll not pay anything (insurance). I've spent most of today on educating myself, and for me, it looks like it might be a faulty expansion vessel. I'm an electric engineer so I need help with this one. I want to get some opinions from more qualified peoples before I'll call someone locally to do a proper repair.
Full story here:
About two weeks ago my PRV blew off when my wife tried to switch the central heating on. I've called my insurance provider who managed to get a gas engineer the next day. Came in said I need a new PRV and someone will replace it within a couple of days. He also increased the pressure and said it's ok to use the boiler as usual and do not worry about leaking water outside. Boiler died 3-4 hours after his visit, so I rang them again the next day, and after 5 appointments that no one turned up, hours on the phone, and 10 days without heating or hot water he finally came back. Changed PRV switched the heating on, showed me that's working, and quickly left. I've asked him a couple of times did he check for a cause of the blown PRV, but he said everything else is fine. When he left pressure was about 1.5 bar 10 minutes later it was just under 3 bar and I've switched the heating off. I've called his call center again, but they told me they can't do anything because when the engineer left my property I've had hot water and central heating. If I want them back I need to leave the heating on and let the PRV blew off again.
At the moment I can switch the heating on for about 10-15 min and leave it off for about 1.5h. That's the time for the pressure to go from 0 to 2 bar and back to 0 again.
I really appreciate any help.
After the issue, I've had recently and a visit from an engineer (full story below) I've got the following symptoms. On my boiler Bosch, junior 28i pressure goes all the way down to 0 bar when only hot water is in use but goes all the way up to 3 bar (and probably above) when central heating is on. Hot water has no effect on the pressure even when it's high. I don't want to use that company/engineer anymore, even though I'll not pay anything (insurance). I've spent most of today on educating myself, and for me, it looks like it might be a faulty expansion vessel. I'm an electric engineer so I need help with this one. I want to get some opinions from more qualified peoples before I'll call someone locally to do a proper repair.
Full story here:
About two weeks ago my PRV blew off when my wife tried to switch the central heating on. I've called my insurance provider who managed to get a gas engineer the next day. Came in said I need a new PRV and someone will replace it within a couple of days. He also increased the pressure and said it's ok to use the boiler as usual and do not worry about leaking water outside. Boiler died 3-4 hours after his visit, so I rang them again the next day, and after 5 appointments that no one turned up, hours on the phone, and 10 days without heating or hot water he finally came back. Changed PRV switched the heating on, showed me that's working, and quickly left. I've asked him a couple of times did he check for a cause of the blown PRV, but he said everything else is fine. When he left pressure was about 1.5 bar 10 minutes later it was just under 3 bar and I've switched the heating off. I've called his call center again, but they told me they can't do anything because when the engineer left my property I've had hot water and central heating. If I want them back I need to leave the heating on and let the PRV blew off again.
At the moment I can switch the heating on for about 10-15 min and leave it off for about 1.5h. That's the time for the pressure to go from 0 to 2 bar and back to 0 again.
I really appreciate any help.
