On a vehicle equipped with front and rear A/C dual evaporator system,the front evaporator cools properly,but the rear evaporator is warm.Which of the following is the most likely cause?

Question

Quizplus · Accepted Answer

The fact that the front A/C evaporator is working properly indicates that the refrigerant system is properly charged. If the system was overcharged or undercharged, both the front and rear evaporators would be affected. Therefore, we can rule out A and B. A stuck open expansion valve in the rear evaporator would prevent the system from properly cooling in the rear, while the front would still work properly. Therefore, D is the most likely cause.

On a Vehicle Equipped with Front and Rear A/C Dual