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If your hydronic hot water heating is acting up it could be your zone valve motor. In this video I show how to change out the motor of the zone valve. The zone valve itself usually is fine, the motors burn out from use.
Check out my other videos for hot water heating::
How a Zone Valve Works - Hot Water Heating
• How a Zone Valve Works...
and
How a Hotwater Natural Gas Boiler Works - Overview
• How a Hotwater Natural...