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No heat in one zone

RI_Mike_158 Member Posts: 1

Heat on the first floor is out. Second floor heat is working. Hot water for the house (showers) is fine. 

Just had the circulator pump replaced a few weeks back. 

If we push hot water through the system by bleeding it there are no air bubbles and nothing of note. It keeps the house at 64 on the first floor. 

We have the valve open to allow water free flow. I just replaced the valve in case that was the issue. 

It's cold, but we used a heat gun on the corners and likely places where there was a chance of ice

BUT the water is not circulating beat I can tell on the first floor. Is this a circulator pump issue? Is there a way to check it while it's attached? Anything I'm missing?