Title: Verify the need for service or repair of HVAC systems based on unusual operating noises.
Course: Diesel Equipment Technology III (20107-III) > Section: Heating, Ventilation, and Air Conditioning: Servicing the HVAC Systems

Verification should include

- testing for proper operation of each component within the system
- determining any needed action.

Process/Skill Questions:

- How does the expansion valve work?
- What is the proper refrigerant charge and type?