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Lennox CB30M-21 Control Board
It is impossible for your furnace or air handler to even function unless this board is correctly installed. The control board is made to regulate everything including the gas valve, the igniter, all the sensors as well as the blower all at once. Be absolutely sure while selecting a replacement due to variances between certain brands. The control board you choose should have a replacement part number that matches both the brand and specific model of HVAC system.
Some warnings your control board is in dire straights
- The heating and cooling system refuses to operate at all
- There is a fault code shown somewhere on the circuit board
- The entire system needs to be reset quite frequently for it to kick in
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If you are going to be buying or purchasing a replacement control board for your Lennox CB30M-21 do your best and cross-check the correct model as well as make a visual comparison so that you are positive that the correct replacement control board is the one being purchased. Once you have the part to install it yourself. Hire someone with experience in your area to replace the part.
Feel free to download your manual for help.
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