52W2901 Flame Sensor for Lennox Furnace Flame Sensor Replaces 52W29 LB-74940A 31
Item model number 52W2901. The total lenth is approx. Replace part numbers: 52w29, 52W2901, 31L71, LB-74940A, 31L7101, 28PV41, etc. Fixes the following symptoms: The furnace does not heat. PART NUMBERS:52W2901, LB47940A, 31L71, 31L7101 – Fits Most Series of Models G40, G41, G50, G51, G60, G61, and G71 Furnaces.