On a refrigerant system there is heavy frost on the expansion valve inlet and low-side pressure is well below normal. Technician A says that the expansion valve stuck in the open position could be the cause. Technician B says that a restricted expansion valve inlet screen could be the cause. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: B
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