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Lennox 42W43 Ignition Control Board
An ignition control board controls the natural gas, the ignition timing as well as other safety devices. It has been a very important circuit board that is usually a part of the main control board for the sake of being more efficient.
What symptoms are present when the ignition board has to be replaced?
- HVAC ignition system declines to begin even though it is supposed to
- The on-signal from the primary thermostat does not make it to the main control board
- Every other problem within the furnace is inspected and seems to be good
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Before buying or ordering, do your due diligence and cross-check the model number and also make a visual comparison so that you are positive that the correct replacement ignition control board is the one being purchased. Some pros can be expensive so you could call around to find a good deal if money is a concern.
Feel free to download your manual for help.
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