Hello,
I have been getting low pressure on my 12 year old Halstead HE combi boiler for about six months now. At first it was going down over the course of the week so needed topping up every week, when I started putting the heating on in winter, the pressure shot up in the space of half an hour. So needed turning off.
I called an engineer who came out and pressurized the expansion vessel which sorted the pressure going up. However it was still going down.
I had a small leak fixed in one radiator by a plumber a few days later as it was leaking a tiny amount from the bleed valve.
Another engineer came out and replaced the gas valve, did a service and put leak fluid into the system. This slowed the loss down. However a day or so later I noticed there was after a deep humming in the pipe when the hot water was turned on, this went a few days later to be replaced with a different noise in the pipes and radiators when the hot water tap was used and turned off and the boiler still running (cooling down fan for around 4 minutes).
Now the copper pipes and radiator is making a running water sound when the heating is turned on.
I also hear a sharp shut off knock under the bathroom floorboard whenever my downstairs washing machine is filling up as it contracts the pipes.
I think I need inhibitor as I asked the engineer to do it during the service but don't think he did.
What can my problem be? Any ideas? Thanks.
I have been getting low pressure on my 12 year old Halstead HE combi boiler for about six months now. At first it was going down over the course of the week so needed topping up every week, when I started putting the heating on in winter, the pressure shot up in the space of half an hour. So needed turning off.
I called an engineer who came out and pressurized the expansion vessel which sorted the pressure going up. However it was still going down.
I had a small leak fixed in one radiator by a plumber a few days later as it was leaking a tiny amount from the bleed valve.
Another engineer came out and replaced the gas valve, did a service and put leak fluid into the system. This slowed the loss down. However a day or so later I noticed there was after a deep humming in the pipe when the hot water was turned on, this went a few days later to be replaced with a different noise in the pipes and radiators when the hot water tap was used and turned off and the boiler still running (cooling down fan for around 4 minutes).
Now the copper pipes and radiator is making a running water sound when the heating is turned on.
I also hear a sharp shut off knock under the bathroom floorboard whenever my downstairs washing machine is filling up as it contracts the pipes.
I think I need inhibitor as I asked the engineer to do it during the service but don't think he did.
What can my problem be? Any ideas? Thanks.
