Practice question

Before opening any school bus A/C refrigerant line for service, the technician must first:

  1. Add dye to the system
  2. Recover the refrigerant with certified recovery equipment
  3. Run the engine at high idle for 10 minutes
  4. Disconnect the bus batteries

Answer: B — Recover the refrigerant with certified recovery equipment

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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 →