Practice question
A bus electronic climate controller will not change cabin temperature and a blend-door actuator is suspected. The best diagnostic approach is to:
- Use the controller's self-test/actuator command and verify actuator movement and feedback
- Add refrigerant
- Replace the orifice tube
- Replace the compressor
Answer: A — Use the controller's self-test/actuator command and verify actuator movement and feedback
The correct answer is shown above. Try the full quiz for additional practice.
Practice more: ASE S7 Air Conditioning Systems & Controls (School Bus) Practice Questions - ASE S7 - Air Conditioning Systems & Controls (School Bus) Certification Exam →