Practice question

A bus with a plugged or extremely dirty cabin/evaporator air filter will most likely show:

  1. A seized compressor
  2. A loss of refrigerant charge
  3. Reduced evaporator airflow and poor cabin cooling even with normal pressures
  4. High refrigerant high-side pressure only

Answer: C — Reduced evaporator airflow and poor cabin cooling even with normal pressures

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