Compatibility: PP236 M16656-24 photocell for Reddy Remington Master Knipco heater parts. Wire length 11.8 inches. USE: Photocell assembly should be used with 104068-02 Ignition Control Board on fuel heater. Replaceable Parts: 21925, 1PP236-MP4, 1PP236MP4 Fits DESA: Dayton, Knipco, Koehring, Master, Reddy, Remington, Sears, TSC: (PP236, M16656-23, M1665623, M16656-24, M1665624) PINNACLE: ProTemp, Master, Remington, Heat-Stream, WorkHorse, Heat Hog and SunStream: (71-016-1010, 710161010) Use On: This photocell is for heaters with hot surface ignitors (glow plugs). Unless you are using a DESA upper heater, which has a plastic handle and shroud covering the fuel tank. The part number for the photocell is M16656-21. Replacement PP236 M16656-24 Photocell for Reddy Remington Master Knipco Heaters Parts For Most HSI (Hot Surface Ignitor) (glowbar) Type Heater Models: B30, B30C, B50, B50A, B50B, B50D-Round, B50D-, Square, B50E, B50F, B50G, B65, B65D, B66D-Round, B66D-Square, B70, B70BT, B99D, B110, B110T, B120, B140, B140D, B150, B150A, B150B, B150C, B150CAK, B150B, B150F, B150FT, B150G, B150GT, B150KD, B165, B15T, B200, B200T, B350, B350A, B350B, B350D, B600, B600/A, B600B, B600D, BC100, BC55CT, BC70ET, B115DT, BC165DT, BV125, BV125S, BV60S, C35, C35A, C35B, C50D, C50E, C50F, C100D, C100E, C100F, C150D, C150E, C150F, F30, F50, F50A, F50D, F50E, F50F, F50G, F50S, F65, F65D, F66D, F110, F110D, F110E, F110F, F110G, F110H, F120D, F140D, F150, F150D, F150E, F150G, F150H, F150S, F350, K30, K50, K50A, K100, K100A, K150, K350, K350A, K600, M30, M50, M50A, M50D, M50S, M65, M65D, M66D, M85, M85D, M100, M100D, M150D, M150S, M350, M600, MARK50, MARK50D, MARK75D, MARK120D, MARK140D, MARK150D, PKC70ET, PKC115DT, PKC165DT, R30, R35, R35A, R35B, R50A, R50B, R55, R70, R70A, R70AT, R70B, R70BT, R70CT, R110, R150, R150A, R150AT, R150B, R150BT, R150D, R155, R165, R165T