Title: (Optional) Verify the need for service or repair of HVAC systems based on unusual operating noises.
Course: Diesel Equipment Technology III (20107-III) > Section: HVAC: Servicing HVAC Systems (EPA 609 required)

Verification should include

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

ASE 1: VI. Heating, Ventilation, and Air Conditioning: A. General (P-1)

Process/Skill Questions:

- How does the expansion valve work?
- What is the proper refrigerant charge and type?
- How does an orifice tube or thermal expansion valve (TXV) work?