Some of my radiators are only tepid. Flow side of radiators is Hot and return is Cold.
Water Heating working fine.
Near Boiler CH system has a T-Junction in Pipework - All radiators on one side of the T seem fine.
On the other side of T first radiator seems to heat fine. but subequent radiators are not. The Flow side of these radiators seems hot - but return cold. Even if I turn the first (the good) radiator on this side off the subsequent radiators do not seem to get beyond tepid.
Any thoughts
Water Heating working fine.
Near Boiler CH system has a T-Junction in Pipework - All radiators on one side of the T seem fine.
On the other side of T first radiator seems to heat fine. but subequent radiators are not. The Flow side of these radiators seems hot - but return cold. Even if I turn the first (the good) radiator on this side off the subsequent radiators do not seem to get beyond tepid.
Any thoughts