I have one radiator which is not working, and am now totally confused as to why!
Initially suspecting a faulty thermostatic valve, I replaced this and re-installed the radiator. Radiator cold.
Removed radiator again, and tested the thermostatic valve and return valves with a bucket under the end of each pipe. Water flowed freely when either valve opened.
opened the thermostatic valve (with radiator still removed) long enough to confirm that the water was hot.
Connected the radiator to the thermostatic valve, turned on the valve, and confirmed water flowed through the radiator into my bucket.
Re-installed radiator. opened thermostatic valve (only) and filled the radiator by opening the bleed valve at the top. Radiator filled with hot water. Radiator now hot.
Opened the return valve, and left for an hour. Radiator now cold! all other radiators in the house hot!
turned off all downstairs radiators (except the problem one) and turned heating up full. left for an hour - radiator still cold!
Can someone please help before I go insane?
It's as though the water from the return is at a higher pressure than the feed, and the return pipe is always stone cold!
BTW this radiator USED to work until about a year ago.
Initially suspecting a faulty thermostatic valve, I replaced this and re-installed the radiator. Radiator cold.
Removed radiator again, and tested the thermostatic valve and return valves with a bucket under the end of each pipe. Water flowed freely when either valve opened.
opened the thermostatic valve (with radiator still removed) long enough to confirm that the water was hot.
Connected the radiator to the thermostatic valve, turned on the valve, and confirmed water flowed through the radiator into my bucket.
Re-installed radiator. opened thermostatic valve (only) and filled the radiator by opening the bleed valve at the top. Radiator filled with hot water. Radiator now hot.
Opened the return valve, and left for an hour. Radiator now cold! all other radiators in the house hot!
turned off all downstairs radiators (except the problem one) and turned heating up full. left for an hour - radiator still cold!
Can someone please help before I go insane?
It's as though the water from the return is at a higher pressure than the feed, and the return pipe is always stone cold!
BTW this radiator USED to work until about a year ago.