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Lennox CB30U-21 Ignition Control Board
The main reason to have an ignition control board is that it oversees the gas valve, the ignition timing as well as other safety devices. It is an important device that, in most cases, has become a standard part of the main board instead of having two separate boards.
Major symptoms of an ineffective main ignition board
- Every other thing in the HVAC system checked out to be OK
- The electrical signal from the thermostat does not make it to the Lennox control board
- HVAC ignition cycle declines to activate at all
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Before buying or ordering a replacement ignition control board for your Lennox CB30U-21 do your best and make sure of the model number as well as make a visual comparison so that you are positive that the right ignition control board is the one being purchased. If you are unsure about the properly replacing the ignition control board on your own then it would be in your best interest to contact a professional to do the work for you.
Feel free to download your manual for help.
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