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Lennox CB30U-21 Control Board
The Lennox CB30U-21 control board is made to direct the gas valve, the igniter, all the sensors as well as the blower all at once. The system will cease to function lest the circuit board is hooked up and is correctly configured. You should always be careful upon choosing a board as a replacement because of the diversity of particular brands and their models. A matching board will have to be compatible with both the make and model of your Lennox CB30U-21 unit.
Signs of an unhealthy primary control board
- There may be a type of code indicated on the circuit board
- The system has to be powered down and back up rather frequently for the heating or cooling to kick in
- The AC or furnace ceases to operate at all
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Before you decide on buying or purchasing any Lennox CB30U-21 replacement part do your best and cross-check the model number as well as make a visual comparison in order to be sure the correct replacement control board is the one being purchased. You do not need to install the part by yourself. Find a professional in your area to do the job for you.
Feel free to download your manual for help.
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