Furnace control boards these circuit boards are designed for controlling furnaces and heating units in hvac systems.
Furnace blower 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.
I hope the youtube video below will help you troubleshoot your furnace s control board.
The armstrong r40403 003 blower control replaces all 40403 001 40403 002 and st9120a b or c blower controls.
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.
Once your ignitor is running hot the control board gets gas flowing through the burners where that is ignited to start heating your home.
The r40403 003 blower control provides outputs for a 2 speed indoor blower motor and single speed inducer motor.
Same day shipping order now and get same day shiping guarateed for assistance please call 1 877 733 9241.
The control receives inputs from the thermostat w y and g pressure switch and high temperature limit switches.
Use with compatible heating units and components available separately.
Icm controls furnace fan blower circuit control board.
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