Circulating hot water but no heat at radiator

Old 01-04-13, 07:55 PM
Alchemer's Avatar
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Exclamation Circulating hot water but no heat at radiator

This is a bit of a mind boggler, so I'll lay it out:
I have a hot water boiler with three zones. All three circulator pumps turn on and circulate water when called for. However, on zone 2, even though hot water is being pulled through, the radiator is getting NO heat. The water going to that zone is hot and the water coming back is a bit colder, expected, but where is that heat going?? I've never had this problem before, it was working yesterday and now it doesn't produce heat, even after being on for several hours. I'm pretty sure it's on a series loop.
Does anyone have any clue what might be happening?
Old 01-04-13, 08:39 PM
lawrosa's Avatar
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May not be a series loop. Since you say you know water is flowing it possible you hear air running through the pipes?

What is the make and model boiler?

What does the psi and temp say on the boiler gauge?

Possible you have low pressure or air. Did you bleed the radiator?

Take pics it helps us help you.

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