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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Our Honeywell thermostat was set to 72 degrees cool- and

Customer Question

Our Honeywell thermostat was set to 72 degrees cool- and when I went upstairs the heat was blowing and the temperature at the zone was reading 99. Any ideas how this could have happened?
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.
Hello, My name is***** many zones are on this system? 1 system and more than one thermostat?
Customer: replied 1 year ago.
3 systems and 3 thermostats.
Expert:  BillyHvac replied 1 year ago.
thank you...this means 3 different systems ...thus no zone panel.This generally is a failure of the thermostat itself. Can you remove thermostat for a test? Take red wire from R yellow wire from Y and green wire from G and twist them all together NOTE if this is heat pump take O wire and combine also...tell me if the unit runs indoor and out.

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