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Harold Kestenholz.
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MasterPlumbers
My bi-level has two thermostats for each floor the one upstairs works fine, heat for days but I’m not getting heat downstairs I switched the thermostats but that is not the problem. I was told about zone value what is it and can I fix it
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The zone valve might be the problem, they usually have handles on them to move to an open position.
If that doesn’t get heat up, check the water pressure on the boiler gauge and read the Air Purge procedure at http://www.hydronicnetwork.net
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