Title: Identify the causes of HVAC electrical control system problems.
Course: Diesel Equipment Technology III (20107-III) > Section: HVAC: Servicing the Electrical Operating Systems and Related Controls

Identification includes the following causes:

- Compressor clutch not engaging
- Pressure switches not allowing the system to function correctly

Process/Skill Questions:

- What problems will shorts cause to the system?
- What effect could the failure of one sensor possibly have on the entire operation of the AC system?