201634 - Call 05

Was something caught in the fan on Debra's truck?
Stump the Chumps. Debra called because her truck made a knocking sound that continued after she shut it off. Tom and Ray were stuck, but ultimately guessed it was something caught in the fan. Tom now decides it’s a blend door in the heating system. Debra says it was the “actuator”--a blend door. So, initial Wrong Answer, but Tom gets a Right Answer for the new guess.