Once your ignitor is running hot the control board gets gas flowing through the burners where that is ignited to start heating your home.
Furnace blower control board.
Furnace control boards these circuit boards are designed for controlling furnaces and heating units in hvac systems.
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The armstrong r40403 003 blower control replaces all 40403 001 40403 002 and st9120a b or c blower controls.
The r40403 003 blower control provides outputs for a 2 speed indoor blower motor and single speed inducer motor.
The control receives inputs from the thermostat w y and g pressure switch and high temperature limit switches.
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.
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Use with compatible heating units and components available separately.
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.
Icm controls icm289 furnace control replacement for lennox control boards replaces all bcc1 bcc2 and bcc3 circuit boards 4 9 out of 5 stars 41 105 08 105.
Icm controls furnace fan blower circuit control board.