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Diagnosing and Repairing Control Systems




1.Running the air conditioning system in recirculate mode for long periods of time can cause:
Re-evaporation odor.
Bacterial growth.
Both a and b.
Neither a nor b.


2.Recirculate mode is also called:
Vent.
Heat.
AC.
Max AC.


3.Dual-zone control systems are also called twin systems.
True.
False.


4.Which of the following procedures is performed as part of replacing the blower motor power module?
Check operation of the clamping diode in the compressor clutch circuit.
Measure the clutch coil amperage draw.
Measure the blower motor current draw.
All of the above.


5.Air conditioning disinfectant can be safely sprayed into the plenum intake of odorous air conditioning systems without the use of personal protective equipment.
True.
False.

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