It doesn't sense flame... Using the HotRod Combo Kit from @copeland_company White-Rodgers we show that a universal flame sensor can be manipulated to fit many applications where universal parts can be utilized. Remember, flame sensors don't actually sense flame, they use the flame to complete the circuit to ground and a DC micro amp signal is the result. #hvac #hvaceducation #hvacknowledge #hvactroublshooting #hvactraining #residenitalhvactech #heatingservice #heatingrepair #heating #hvacservice