*PLUMBERSSTOCK EXPERT* responded:
Good day! Yes, this product is what you're looking for. This Lennox 75M21 hot surface ignitor replaces the Lennox 75M2101 ignitor and is used for most of these series: G43UF-36B, G40DF-24A, G40DF-36A, G40DF-48C, G40DF-60C, G40DF-60D, G40UH-24A, G40UH-36A, G40UH-36B, G40UH-36C, G40UH-48B, G40UH-48C, G40UH-60C, G40UIH-60D, G43UF-24B,G43UF-48C, and G43UF-60D. Please don't forget to click on Add to Cart and enter your zip code if you're ready to place an order. Happy shopping at PlumbersStock.com!