after the heating reaches temperature, goes off, then comes back on when it's required, I hear a noise which I can only describe as being like a 49cc. scooter passing by a double glazed window. In fact I thought that was what it was the first couple of times I heard it.
Anyone (preferably a skilled plumber) got any ideas?
P.S. I have done nothing to anything requiring 'CORGI' personnel.
2007-03-27 01:37:06 · 11 answers · asked by mal g 5 in Home & Garden ➔ Maintenance & Repairs
You have air trapped in the system. It can sometimes take 3 or 4 attempts to get rid of it, but here is the approved way of doing it. Firstly do NOT use a high pressure hose to blast through the system as suggested. Turn the boiler on and all the rad valves until they are fully open. Wait 10 to 15 mins for the system to get hot then switch off the boiler. Bleed the radiators in this order, start with the one furthest away from the boiler and then work towards the boiler, making the last one that you bleed the one nearest the boiler. Switch on the system again and listen for noises, if it is still noisy then repeat the procedure until the whole thing is free from clonking, wheezing and banging. You do not say if it is a combi boiler?...if so then check and top up using the filling loop as necessary after bleeding in case there has been any pressure loss. If you have any more probs, then please tell me what type and make of boiler it is, but remember, you may not be able to get rid of all the air in one go, so just be patient and persevere..you'll get rid of all your air locks eventually!
2007-03-27 08:38:09 · answer #1 · answered by twatlington smythe 1 · 1⤊ 0⤋
Have you refilled the system, When you remove the rads you lose a certain amount of water from the system - if you reconnect the system with insufficient water this could cause your problem? You should have a filling loop to replace the lost water - but you can only add a certain amount - this is usually to a set pressure range indicated on the boiler - best to add slowly but surely - then run the system, and bleed air if needed....... best to get someone who knows what they are doing though
2007-03-27 04:30:49 · answer #2 · answered by DARREN R 1 · 0⤊ 0⤋
further to the last couple of answers. assuming you have 3 rads not working but the rest are getting hot, trun off the hot ones (just 1 side) to create a short circuit to the faulty ones. Also look at your pump where the power cable enters the control box on the pump, there should be a speed selector, turn the speed up to 3 it will increase the velocity in the system and may solve the problem if successful restore settings to as before.
Hope this helps
CORGI Reg
2007-03-27 09:50:18 · answer #3 · answered by Anonymous · 0⤊ 1⤋
You may have disturbed some sediment which will be in the bottom of the radiator. This can cause a noise. The best thing to do is to blast them through with a high pressure hose. I cannot think what else it may be. Of course you could have trapped air and then you need to bleed them, but the most likely cause is old sediment eg., limescale, rust, etc.Good luck.
2007-03-27 01:42:46 · answer #4 · answered by Dr Paul D 5 · 0⤊ 0⤋
Its Air in the system, my Dad is a heating engineer and my house had the same problem and it takes time for the air to move into the radiators so you can bleeds them.
Basically you'll need to bleed the rads every couple of weeks
2007-03-27 01:42:23 · answer #5 · answered by poli_b2001 5 · 2⤊ 0⤋
Near your pump there is usually an air-lock. There should be a bleed valve to bleed any air trapped in the pump. If there is air in the punp, it can spin at high speed and the sound is like what you described.
2007-03-27 01:48:03 · answer #6 · answered by Anonymous · 0⤊ 0⤋
It's still air in the system, and u need to keep bleeding them until the banging stops, its the pipes knocking with the pressure. TRY bleeding them when the heating is switched on and the water is circulating.
2007-03-27 01:43:23 · answer #7 · answered by GRAHAM H 1 · 2⤊ 0⤋
if the rads are heating its not an air lock. it sounds like when your circulator kicks on the flow of water is rattling a loose valve gate. this may have occurred when you shut and opened the rads. to check this shut the rads one at a time and cycle the heat. when (if) the noise stops you have located the loose valve gate or washer
2007-03-27 02:08:19 · answer #8 · answered by louis z 3 · 0⤊ 1⤋
you have an air lock in the boiler. can be tricky to remove but you would only need a registered plumber if gas work or the boiler needs to be taken apart
2007-03-27 01:41:06 · answer #9 · answered by cereal killer 5 · 0⤊ 0⤋
we had this trouble and as i am a council tenant i got them to fix it however that may not be the point for you so i found the corgi web site i hope it helps.www.corgi-gas.com
2007-03-27 01:42:21 · answer #10 · answered by fushia 5 · 0⤊ 0⤋