Practice question

Non-condensable air in a school bus A/C system most commonly causes:

  1. No effect on system pressures
  2. A short cycling low-pressure switch
  3. Lower than normal high-side pressure
  4. Higher than normal high-side pressure and reduced cooling

Answer: D — Higher than normal high-side pressure and reduced cooling

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Practice more: ASE S7 Air Conditioning Systems & Controls (School Bus) Practice Questions - ASE S7 - Air Conditioning Systems & Controls (School Bus) Certification Exam →