Lennox G40UH-36A-070 Control Board

The control board is made to operate the gas valve, the igniter, all the various sensors and the blower all in one unit. The HVAC system will be unable to activate lest the circuit board is configured and seated properly. You must be careful when you decide to replace your control board due to variances between certain brands. A control board that you have chosen will have to be compatible with both the brand and model of your particular system.

What are the indications that my main board is on its last leg?

Check eBay to see if your control board is in stock!
If you are going to be buying or purchasing a replacement control board for your Lennox G40UH-36A-070, do your due diligence and double check the model number and also make a visual comparison in order to be sure the proper replacement control board is being ordered. Replacing the control board is a breeze if you have the time and have the tools to do it right.
Feel free to download your manual for help.
Check eBay for your control board!