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Steam Cast iron raditor makes a loud popping or banging sound.

I have onr cast iron radiator that makes a loud popping or bang sound when heating and coolling. I removed and drained the radiator and the sound is still there. Latly I replaced the radiator with another radiator and the sound ig gone. What is wrong with the original cast iron radiator and how do I fix it?

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Some cracking and pinging is normal due to the thermal expansion of the metal. If some make more noise than others, it could be an indication of a plugged or restricted steam vent (the chrome gadget on the side of the radiator) or that the return line at the boiler needs draining or that there is too much water in the supply lines. A good flushing of the supply and return lines will help. Check your water level after flushing. I would replace the original steam vent on the suspect radiator and see if that helps, it could be over heating.

Posted on Jan 31, 2010


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