*PLUMBERSSTOCK EXPERT* responded:
Hello! Thank you for posting your question here on PlumbersStock concerning the ADP 76722700 Control Board. No, it won't. This control board will not fit with your Lennox 80MGF3-75A-5 furnace. The Lennox CAR17W82 control circuit board is what you're looking for. This product is not yet on our site, but if you're interested in purchasing the Lennox CAR17W82, please contact one of our knowledgeable customer service representatives @ 435-868-4020 between 8:00 am and 7:00 pm MST or through e-mail at email@example.com. They will be happy to assist you with your order. Please let us know if you have any other questions or concerns about this product. We are always happy to help.