Ice Cold Radiator

Pam_5

My home @ 75 years old and is heated with hot water radiators. Along with a new boiler installed in 1997, we also had a new circulating pump, automatic fill valve, and air separator/air vent installed. The system has its original piping with a no diaphragm expansion tank. We never had a problem. This past summer we had updated our kitchen and replaced 2 traditional radiators with 2 new flat panel types. This remodeling had the pipe system opened for @ a week. Problem: One "fin tubed" baseboard radiator (never touched during remodeling) remains cold. This radiator is one of the first loops branching off from the boilers supply line feeding the rest of the house. SYMPTOM: The supply pipe to the radiator is hot but the return is ice cold. We have "bled" this radiator numerous times. My contractor disconnected and flushed that pipe loop. He also installed a new circulating pump, replaced the automatic fill valve, and replaced the "Supply" and "Return" flow valves on that loop. Although we continued to bleed that radiator, the symptom remains the same. Any suggestions? Please advise.

Linda_5

One radiator stays ice cold...?

We have steam radiators, one pipe system, gas boiler/furnace. All radiators work great, even upstairs, except for the bathroom radiator. Even the pipe leading to the on/off valve stays ice cold. We have made sure it is turned all the way on, and have also changed the vent on the advice of our handy-dandy Home Depot guy. Still, the radiator remains ice cold. Any clue as to why?
Thanks!

Daniel_3

Sounds like condensate pooling at one or more risers. You'll have to check pitch on the pipes from the main in the basemnet all the way to the radiator.

Pam_5

One ice cold radiator

My home @ 75 years old and is heated with hot water radiators. Along with a new boiler installed in 1997, we also had a new circulating pump, automatic fill valve, and air separator/air vent installed. The system has its original piping with a no diaphragm expansion tank. We never had a problem. This past summer we had updated our kitchen and replaced 2 traditional radiators with 2 new flat panel types. This remodeling had the pipe system opened for @ a week. Problem: One "fin tubed" baseboard radiator (never touched during remodeling) remains cold. This radiator is one of the first loops branching off from the boilers supply line feeding the rest of the house. SYMPTOM: The supply pipe to the radiator is hot but the return is ice cold. We have "bled" this radiator numerous times. My contractor disconnected and flushed that pipe loop. He also installed a new circulating pump, replaced the automatic fill valve, and replaced the "Supply" and "Return" flow valves on that loop. Although we continued to bleed that radiator, the symptom remains the same. Any suggestions? Please advise.