Is it possible for a steam radiator to become clogged internally?
Here's my scenario:
I know there is steam coming into the radiator from the main valve. The valve is fully opened. The steam comes into the radiator, but only warms the first 2-3 sections of the radiator that is about 8 sections wide. I removed the air valve, and no steam comes out, even when the system is running.
Is it possible that there is some sort of clog inside the radiator that is preventing the steam from fully passing through all of the sections?