I have a 1924 home that was converted from a gravity fed hot water boiler to a Trinity TI 150 (forced hot water). The system works great except when it starts to heat up several of my radiators make a loud bang/clank noise. It's like someone hit the radiator with a hammer.
I checked the affected radiators and they all appear to be level, plus I bled the all the air out.
Our basement (where all the pipes run) is basically unheated and is about 52 degrees. Does that have anything to do with this noise?
Any help on what is causing this issue or how to fix it is appreciated. Thanks.
P.S. This is definitely a HOT WATER system, NOT steam.