Hi,
We had a rusty towel rail in the bathroom, that would only ever get hot at the bottom. Assuming it must be clogged through, I replaced it on the weekend, to find the same problem with a brand new one.
It's a 1.5M ladder rail, but only the bottom 4 rungs would get hot. Having bled the radiator, air initially comes out, but then nothing. Silence - no air, no water. I tried unscrewing the bleed plug and peering into the radiator. Even with both valves turned on, I can take the bleed plug out the radiator and stare into it, with a torch, and see the water at the bottom of the rad. It looks like there's just no pressure.
The radiator on the landing just outside the bathroom never seems to get hot at the very top either. Bleeding this is the same as the towel rail in that initially there's air, but then just nothing. Over the course of 3 days, I've been able to extract pockets of air out of 3 upstairs radiators, but it's all very slow. I've managed to get the heat in the towel rail up to rung 5 now!
It looks as though there's just not enough water/pressure in the central heating, but it's a vented system and I've checked the expansion tank in the loft all looks fine.
Any suggestions for what else I could try?
Many thanks in advance!
We had a rusty towel rail in the bathroom, that would only ever get hot at the bottom. Assuming it must be clogged through, I replaced it on the weekend, to find the same problem with a brand new one.
It's a 1.5M ladder rail, but only the bottom 4 rungs would get hot. Having bled the radiator, air initially comes out, but then nothing. Silence - no air, no water. I tried unscrewing the bleed plug and peering into the radiator. Even with both valves turned on, I can take the bleed plug out the radiator and stare into it, with a torch, and see the water at the bottom of the rad. It looks like there's just no pressure.
The radiator on the landing just outside the bathroom never seems to get hot at the very top either. Bleeding this is the same as the towel rail in that initially there's air, but then just nothing. Over the course of 3 days, I've been able to extract pockets of air out of 3 upstairs radiators, but it's all very slow. I've managed to get the heat in the towel rail up to rung 5 now!
It looks as though there's just not enough water/pressure in the central heating, but it's a vented system and I've checked the expansion tank in the loft all looks fine.
Any suggestions for what else I could try?
Many thanks in advance!
