Thermocouple Desa Reddy Part # 113790-01 Also 8643 , 8643NR The 113790-01 Thermocouple is a 10 Inch thermocouple that was used on the Universial heaters made by DESA International. This 113790-01 Thermocouple can also be used to replace the 8643 thermocouple that was used by Schue Products.Propane LP Forced Air Heaters Fits: RCP80VA, RCP200VA, TC112, 80-C, 200C, 80-CC, SPC-80CC, SPC-80C, SPC-200C, TC114, TC80VA, TC80VC, TC200VA, & OTHERS