52W29 -- 31L71 Flame Sensor , Genuine Lennox OEM Part Fits: (G40DF) 45, 45X, 70, 70X, 90, 90X, 110, 110X, 135, 155
(G40UH) 45, 45X, 70, 70X, 90, 90X, 110, 110X, 135, 155 (G41UF) 45, 70, 90, 110, 135
(G43UF) 45, 70, 90, 90H, 110, 110H, 135 (G50DF) 45, 45X, 70,70X ,90, 90X, 110, 110X, 135 (G50UH)45, 45X, 70, 70X, 90, 90X, 110, 110X, 135, 155, I70, I70X, I90. I90XI 110, I110X, I135 (G50UHI) I70, I70X, I90, I90X, I110, I110X, I135
(G51MP) 45, 70, 90, 110, 135
(G60DF) 45, 45X, 70, 70X, 90, 110, 135, V70, V70X, V90, V90X, V110, V110X, V135
(G60DFV) V70, V70X, V90, V90X, V110, V110X, V135
(G60UH) 45, 45X, 70, 70X, 90, 90X, 110, 110X, 135, V70, V70X, V90, V90X, V110, V110X, V135
(G60UHV) V70, V70X, V90, V90X, V110, V110X, V135
(61MP) 45, 70, 90, 110, 135, V45, V70, V90, V91, V110, V111, V135
(61MPV) V45, V70, V71, V90, V91, V110, V111, V135