I live on the 14th floor of a 30 story apartment building and so far, I’ve been bleeding my radiators myself.
This usually worked and after bleeding I had a fully functioning radiator, 100% filled with water.
However, last time I tried bleeding, it would only fill up to 25% of its volume, it’s like there’s no pressure in the circuit.
Am I doing something wrong?
Older systems have been known to use the radiators as the expansion tank. this would not meet modern code but plenty of old systems exist.