Technician A says the thermostatic expansion valve and the fixed orifice tube perform the same function. Technician B says heat from the evaporator core surface is lost to the boiling and vaporizing refrigerant. Who is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct. The thermostatic expansion valve and the fixed orifice tube both regulate the flow of refrigerant into the evaporator, and heat from the evaporator core surface is indeed lost to the boiling and vaporizing refrigerant, which is a fundamental principle of how air conditioning systems operate.

Technician a Says the Thermostatic Expansion Valve and the Fixed