Title: Test the A/C compressor clutch relays, modules, wiring, sensors, switches, diodes, and protection devices.
Course: Diesel Equipment Technology III (20107-III) > Section: HVAC: Servicing the Electrical Operating Systems and Related Controls

Testing should include a manufacturer performance A/C test to ensure the system is working as designed.

Process/Skill Questions:

- What occurs when the low-pressure switch activates?
- How do the low- and high-pressure switches protect the system?