What would happen to the performance of the HVAC unit if the manual coolant shut off valve on the engine were closed?
A. The unit could cool but not control temperature in the main cab.
B. The unit could cool but not control temperature in the sleeper compartment.
C. The unit would not heat or control temperature of either the cab or sleeper compartment.
D. All of the above statements are possible scenarios.
Answer: D
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