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Lennox G40UH-36B-090 Control Board
The Lennox G40UH-36B-090 control board is constructed to direct everything including the gas valve, the igniter, the flame sensor as well as the air circulator all in one unit. Heating and cooling systems will not even run at all without this vital piece of hardware is configured and seated properly. It is of utmost importance when you are deciding on a replacement due to the vast differences in brand and air handler types. The control board picked must have a matching part number consistent with both the brand and specific model of your heating and cooling system.
Simple indications of an ineffective control board
- System has a strange type of error code indicated on the control board
- The entire system has to be powered down and back up quite a lot for the furnace or AC to kick on
- The unit refuses to initialize period
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