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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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The fan in furnace starts as soon as the target temperature

Customer Question

The fan in furnace starts as soon as the target temperature is reached, than goes on and off, and only the fan working ( no more AC or heating)... Unless we turn off the breaker and restart the process... Already changed the thermostat and the main circuit board in the furnace... Pls help
Submitted: 2 months ago.
Category: HVAC
Expert:  Airheatman replied 2 months ago.

What is model on the furnace?

Customer: replied 2 months ago.
Customer: replied 2 months ago.
Not a specific brand