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Lennox 13ACD-024 Control Board
The control board is constructed to control the gas valve, the ignition igniter, the flame sensor as well as the blower all at once. Heating and cooling systems will not even operate whatsoever without the board correctly installed. The board you choose must be compatible with both the brand and specific model of furnace or air handler you have. Be absolutely sure while selecting a replacement due to differences in systems.
Hints of a declining main circuit board
- The AC or furnace is not able to start whatsoever
- Power to the circuit board has to be turned off and back on often for the heating or cooling to kick in
- There may be some sort of code randomly appearing on the front of the control board
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