Radiator hot at bottom cold at top
- Thread starter stupendo
- Start date
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B
breezer
guess: if nothing comes out then nothing is geeting in, but since rads heat from the top down, i wuould guess it is full of sludge.
take rad off take into garden and put a hose on it and turn tap on and see what comes out
take rad off take into garden and put a hose on it and turn tap on and see what comes out
The problem is no air coming out. It doesn't sound like sludge. Sludge will normally give you cold spots at the bottom of the radiator. Are you doing this with the heating off? There is a danger that if the pump is running you can actually suck air in.
Probably worth checking the position of the lockshield valve as well.
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B
breezer
try my suggestion, its free and you have nothing to loose
If it's a rushing noise then you still have air in it.
It's not a lot of trouble to take the rad off and clean it out if you want to. At least you'll be starting from square one when it comes to refilling it! I still don't think it's that though - mind you I should have asked how old the system is before saying that and does it have inhibitor?
Inhibitor is a chemical that you add to the system when you fill it in order to stop corrosion.
This http://www.fernox.com/?cccpage=mb_1&sub=8 is an example of said stuff. There are other products around.
This http://www.fernox.com/?cccpage=mb_1&sub=8 is an example of said stuff. There are other products around.
No to the Inhibitor.
The system had been drained for two years prior to us moving in, as I say this radiator has been replaced as it was leaking. The valves (is that the correct term) were not replaced only the radiator itself.
The system is approximately six years old.
The system had been drained for two years prior to us moving in, as I say this radiator has been replaced as it was leaking. The valves (is that the correct term) were not replaced only the radiator itself.
The system is approximately six years old.
try poking the bleed vent (take screw out first) might be blocked 
I have to agree with kev.
I bought a cheap rad from travis perkins recently, the type with the bleed screw on the back of the panel. After much scratching of head, I poked the bleed hole with wire and whoosh, out came the air. It was then panic stations to get the screw back in.
I suggest you check you know how to close the valves on each end of the radiator before proceeding with kev's solution.
I bought a cheap rad from travis perkins recently, the type with the bleed screw on the back of the panel. After much scratching of head, I poked the bleed hole with wire and whoosh, out came the air. It was then panic stations to get the screw back in.
I suggest you check you know how to close the valves on each end of the radiator before proceeding with kev's solution.
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