Hi,
I wonder if anyone can help me.
I have recently moved into a house which was built in the early 80s. The central heating is pretty much original as far as I can tell - original looking rads and microbore pipes feeding them as well as feed and expansion tank for the central heating in the loft. The boiler is a newish British Gas 330 and there is a new looking grundfos 15-60 pump set to setting 3. There is a new unvented cylinder in the airing cupboard for the hot water.
When the central heating is running by itself, there are often periods - anywhere between 5 mins and hours - where the system makes a very loud whooshing noise as water circulates around the system. Sounds a bit like a road sweeper truck driving past the house! This can be heard all around the house.
When the hot water is being heated - either alone or at the same time as central heating - the noise is never present.
Sometimes if the noise has started while the heating is running, it can be stopped by cycling the water on and then off after a few minutes... until it comes back again!
I've tried bleeding radiators but they seem ok to me. One of the rads in the house doesn't really heat up, so I suspect a blockage in the microbore feeding it (I have tried playing around with valves in case it was a balancing problem).
I can live with the one rad not heating up for now until I can afford to renovate the whole system, but I could do with quietening the system down - especially at this time of year when the heating is on a lot!
Does anyone have any ideas?
Many thanks in advance,
Burt
I wonder if anyone can help me.
I have recently moved into a house which was built in the early 80s. The central heating is pretty much original as far as I can tell - original looking rads and microbore pipes feeding them as well as feed and expansion tank for the central heating in the loft. The boiler is a newish British Gas 330 and there is a new looking grundfos 15-60 pump set to setting 3. There is a new unvented cylinder in the airing cupboard for the hot water.
When the central heating is running by itself, there are often periods - anywhere between 5 mins and hours - where the system makes a very loud whooshing noise as water circulates around the system. Sounds a bit like a road sweeper truck driving past the house! This can be heard all around the house.
When the hot water is being heated - either alone or at the same time as central heating - the noise is never present.
Sometimes if the noise has started while the heating is running, it can be stopped by cycling the water on and then off after a few minutes... until it comes back again!
I've tried bleeding radiators but they seem ok to me. One of the rads in the house doesn't really heat up, so I suspect a blockage in the microbore feeding it (I have tried playing around with valves in case it was a balancing problem).
I can live with the one rad not heating up for now until I can afford to renovate the whole system, but I could do with quietening the system down - especially at this time of year when the heating is on a lot!
Does anyone have any ideas?
Many thanks in advance,
Burt
