I live in a house with a Valliant boiler - over the past few weeks we've had plumbers out right left and centre, and they can't seem to reach a consensus on what is wrong with it. If anyone can help, I'd be very grateful!
Basically, when we returned after Christmas, the pipes which run through my room started making a noise, which sounded like a grinding noise - as if the water in the pipes was being forced up the pipes more than it needed to be. I am on the first floor of the house, the boiler (which the pipes lead to) is in the room above me. The hot water tank (I believe) is in the loft above that.
The noise only occurs between about midnight and 6 a.m. and prevents me sleeping because it is so loud. Obviously, this means the plumber can't listen to it!
The pressure on the boiler was very low (approx 0.5) when the noises first started. The first plumber put the pressure to 1.8 which stopped the noises. Over the weekend it fell to 1.2 and the noises started again. The second plumber has turned the pressure down to just over 1 and I have yet to find out if the noises are going to come back tonight.
We tried switching the hot water off overnight and the noises don't happen then. They also don't happen when the heating is on, or it appears, if the heating has been on during the day. When the heating is on, the pressure rises slightly (about 0.4).
The plumbers have checked the pressure relief valve and seem to think that isn't the problem. The second plumber suggested that the diverter valve could have gone and that might be causing the problem but this was replaced about 18 months ago.
Has anyone else come across something like this?
Basically, when we returned after Christmas, the pipes which run through my room started making a noise, which sounded like a grinding noise - as if the water in the pipes was being forced up the pipes more than it needed to be. I am on the first floor of the house, the boiler (which the pipes lead to) is in the room above me. The hot water tank (I believe) is in the loft above that.
The noise only occurs between about midnight and 6 a.m. and prevents me sleeping because it is so loud. Obviously, this means the plumber can't listen to it!
The pressure on the boiler was very low (approx 0.5) when the noises first started. The first plumber put the pressure to 1.8 which stopped the noises. Over the weekend it fell to 1.2 and the noises started again. The second plumber has turned the pressure down to just over 1 and I have yet to find out if the noises are going to come back tonight.
We tried switching the hot water off overnight and the noises don't happen then. They also don't happen when the heating is on, or it appears, if the heating has been on during the day. When the heating is on, the pressure rises slightly (about 0.4).
The plumbers have checked the pressure relief valve and seem to think that isn't the problem. The second plumber suggested that the diverter valve could have gone and that might be causing the problem but this was replaced about 18 months ago.
Has anyone else come across something like this?
