Radiator in Loft - Bleeding

maybe_tomorrow_2

I have 2 radiators in a loft conversion, one doesnt seem to heat up at all, whilst the other heats up slightly but not as warm as those on the first floor and ground floor.

Is this just a case of them needing bled or could there be other issues with pressure/circulation and if so should I hold off on bleeding and get someone to have a look. Its a conventional boiler/system.

thanks

keystone

Where is the F&E tank in relation to the two extra radiators?

Cheers

maybe_tomorrow_2

Im not 100% sure, the only tank I can see is in the loft and is more or less level with the radiators....but how would this explain one getting hot and not the other?

thanks

keystone

The F&E tank (small one) needs to be above the highest rad. Thats why neither are performing. The fact that one is better than the other is not necessarily connected but one step at a time. I don't think bleeding will necessarily help. Was the system rebalanced in total after they were installed? Do the feed and return pipes to both get hot when system is on?

Cheers

maybe_tomorrow_2

Thanks,

The loft was converted by previous owners so i dont know if the system was balanced or not.

Ok, the small tank is above the radiators, the base of tank is about 1ft above top of radiator to put it in perspective.

Radiator number 1's feed and return are hot but radiator is not as hot as others in house.

I have just turned down the thermostat on the rest of the radiators in the house (they were all on full) and there is now hot water beginning to flow into radiator number 2. Return still cold though.

keystone

Rad 1 might have air/hydrogen in it. remember that air will always find its way to the top of the system eventually.

That was going to be my next suggestion. Turn off all the others and see if these two heat up. If they do then there is no obstruction to flow like an airlock. If they still don't heat up then check position of the valves. If TRVs check for sticky valve syndrome.

After I would suggest that the entire system be balanced.

Cheers

maybe_tomorrow_2

Thanks for the advice. I will turn the others off and try again.

keystone

Best of luck. You'll crack it.

Cheers