All radiators in house fine, except one!

nobile

Basically with the heating on full blast, and thermostat on max, all our radiators are piping hot except one.

It's on the ground floor & the I think the furthest one away from boiler. Eventually the top of the radiator warms up but not the centre or bottom which remains cool/cold.

The only way to get it hot is to turn all the other radiators off, wait for it to heat up, then turn the others back on - but that is not an option every day until Summer!

Any advice, solutions, tips etc as to what we can try?

Thanks

a&akay

Restriction in the pipework due to sludge or air? Turn off all rads in the house except smallest upstairs, towel rail? Turn the pump up to 3 if it has a 1, 2 , 3 setting. Bleed off air in the affected rad if some appears there. Turn down the pump to original setting. If that's no good, turn down the other downstairs' rads' lockshields a bit to balance the flow better.

nobile

a&akay wrote: »

Restriction in the pipework due to sludge or air? Turn off all rads in the house except smallest upstairs, towel rail? Turn the pump up to 3 if it has a 1, 2 , 3 setting. Bleed off air in the affected rad if some appears there. Turn down the pump to original setting. If that's no good, turn down the other downstairs' rads' lockshields a bit to balance the flow better.

New radiators & boiler fitted 15 months ago, so fully drained system, now has some magnet-filter thingy (apologies for lack of technical knowledge!) installed in the system. I think the rad had the problem from Day 1 but I just didnt notice, its so cold these days that it felt cold inside, so I checked the rad by touch & realised there was an issue.

All rads have thermostatic valves (1-5) & bolier has min-economy-max setting for both water & heating. I've bled all rads but no air, only water comes out.

Will try your suggestion. jNo towel rad in bathroom but smallest rad is there. What do you mean by 'Turn the pump up to 3 if it has a 1, 2 , 3 setting'?

Thanks for your help, it is appreciated

Le_Kirk

nobile wrote: »

What do you mean by 'Turn the pump up to 3 if it has a 1, 2 , 3 setting'?

Thanks for your help, it is appreciated

You will need to be able to access the pump to try this. If it is within the boiler casing, you need to remove the outer casing. Sometimes pumps are installed separately (airing cupboard for example) and are easy to see. Wherever the pump is, there is usually a dial on the front marked 1, 2, 3 relating to speeds. Only bleed radiators when system is powered down, i.e. pump not running.

Tom99

Also check the lock-shield valve on the rad which does not get hot is fully open

nobile

Le_Kirk wrote: »

You will need to be able to access the pump to try this. If it is within the boiler casing, you need to remove the outer casing. Sometimes pumps are installed separately (airing cupboard for example) and are easy to see. Wherever the pump is, there is usually a dial on the front marked 1, 2, 3 relating to speeds. Only bleed radiators when system is powered down, i.e. pump not running.

Thanks, but I think I'll steer clear from messing with the boiler's innards! Maybe mention it when service is due perhaps?

Ectophile

Tom99 wrote: »

Also check the lock-shield valve on the rad which does not get hot is fully open

In addition to that, if all the other lockshield valves are fully open, the hot water may not even be getting to the last radiator.

The system may need balancing - closing down all the lockshield valves a bit to even the flow between all the radiators.

Tom99

[FONT=Verdana, sans-serif]If all else fails then maybe the system was not properly flushed 15mths ago when the new boiler was installed.

[/FONT] [FONT=Verdana, sans-serif]My daughter had exactly this problem with two rads a couple of months ago. The heating engineer suggested a power-flush at a cost of £500 which is why so many other options were investigated as above before doing that.

[/FONT] [FONT=Verdana, sans-serif]After the power-flush everything is fine, its must have been sludge in a few pipes, since all the rads were all new.[/FONT]