Hi,
One of my radiators was struggling to get warm, but mainly in the bottom half. I bled all the radiators thoroughly, and with it being at the bottom I suspect the issue wasn't air.
I put in some Sentinel cleaning solution from Screwfix (Sentinel Rapid Dose X400) for 4 weeks, but it didn't improve. Today I did the following:
- Connected hose to radiator drain valve
- Isolated all other radiators (by closing flow and return valves)
- Opened the radiator drain valve the hose was connected to
(Water drained out, seemed clean. Opened blead valve and a bit more came out, but no dirty water)
- Turned the valve under the boiler on to put water back into the system and to flush through the radiator and back out through the hose. The water came out fast and wasn't dirty
- I then repeated this for all of the other radiators (only 6 as I'm in a ground floor flat)
- Closed the valve and removed the hose
- Filled the system back up to 1.5 bar
- Tried central heating again
All radiators were piping hot, except for that one, again, at the bottom! ARGH!!
So, I've just done the following:
- Drained said &*@%$ radiator and flushed it through with the hose. Water came out fast from both bottom holes and no sludge/black stuff came out
- Removed blead valve completely and still the water flowed freely
So what could be the issue? Is the blockage in my return pipe from that radiator? Am I to assume that is the last radiator in the circuit as its only that one that is affected?
I should also say, the boiler is a Combi, and the pipework for the radiators is very thin, think its called microbore.
Suggestions? PLEASE??! Thanks
One of my radiators was struggling to get warm, but mainly in the bottom half. I bled all the radiators thoroughly, and with it being at the bottom I suspect the issue wasn't air.
I put in some Sentinel cleaning solution from Screwfix (Sentinel Rapid Dose X400) for 4 weeks, but it didn't improve. Today I did the following:
- Connected hose to radiator drain valve
- Isolated all other radiators (by closing flow and return valves)
- Opened the radiator drain valve the hose was connected to
(Water drained out, seemed clean. Opened blead valve and a bit more came out, but no dirty water)
- Turned the valve under the boiler on to put water back into the system and to flush through the radiator and back out through the hose. The water came out fast and wasn't dirty
- I then repeated this for all of the other radiators (only 6 as I'm in a ground floor flat)
- Closed the valve and removed the hose
- Filled the system back up to 1.5 bar
- Tried central heating again
All radiators were piping hot, except for that one, again, at the bottom! ARGH!!
So, I've just done the following:
- Drained said &*@%$ radiator and flushed it through with the hose. Water came out fast from both bottom holes and no sludge/black stuff came out
- Removed blead valve completely and still the water flowed freely
So what could be the issue? Is the blockage in my return pipe from that radiator? Am I to assume that is the last radiator in the circuit as its only that one that is affected?
I should also say, the boiler is a Combi, and the pipework for the radiators is very thin, think its called microbore.
Suggestions? PLEASE??! Thanks