Low water content boiler getting over 30 years old. good chance boiler stat is out of calibration and letting the water get too hot which shows up with banging when pump turns off
Low water content boiler getting over 30 years old. good chance boiler stat is out of calibration and letting the water get too hot which shows up with banging when pump turns off
Isn't that boiler supposed to have a pump overrun stat or something? I vaguely remember installing one back around 1980. Sounds like the pump is stopping too quickly as namsag said. I don't suppose anyone's got any MIs for it?
Choice of boiler stat gone and it is getting too hot or boiler is full of scale and it is not getting rid of it`s heat so is noisy,
My thought on this particular boiler is if the heat exchanger was badly scaled it would be noisy all the time not just as it turns off.
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