Heating, Air Conditioning, Fridge, HVAC/air conditioning


only one zone working how to work other damper

Check the low voltage wiring from your thermostat to the damper motor.
Check the low voltage at the damper motor when the thermostat is calling for heat or cool at that zone to see if your getting power.
When the thermostat calls for heat or cool it activates the damper first, when the damper opens it closes a switch that activates the rest.
Or  you might just have a stuck damper?

Heating, Air Conditioning, Fridge, HVAC

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Jim Barnhart


Fifty + years conditioning the air.


Answer questions about , residential and commercial. Answer questions about sheet metal fabrication. Fifty years plus experience. No answers for oil equipment, No answers for kitchen appliances, No answers for laundry appliances, I don't specialize in one particular area of the HVAC area, I'm more of a General Practitioner, Limited in refrigeration/

Hands on since 1950

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