Heat pump defrost control board.
Furnace blower control board.
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I hope the youtube video below will help you troubleshoot your furnace s control board.
Typically your control board kicks on the furnace ignition system either a spark generator glow coil or pilot light after receiving a single from your thermostat that the temperature is too low.
They can replace oem control boards in direct wire for wire replacement.
2 next last.
The control receives inputs from the thermostat w y and g pressure switch and high temperature limit switches.
Once your ignitor is running hot the control board gets gas flowing through the burners where that is ignited to start heating your home.
Use with compatible heating units and components available separately.
Furnace control boards these circuit boards are designed for controlling furnaces and heating units in hvac systems.
If the furnace s draft inducer will not start or if the blower motor will not start then this could very well be a control board problem.
The armstrong r40403 003 blower control replaces all 40403 001 40403 002 and st9120a b or c blower controls.