Title: Inspect and test HVAC system blower motors, resistors, switches, relays, wiring, and protection devices; determine needed action.
Course: Automotive Technology III (20104-III) > Section: Heating, Ventilation, and Air Conditioning (HVAC): Operating Systems and Related Controls Diagnosis and Repair

Procedure should include

- performing a visual inspection of components
- testing individual components
- following service materials and manufacturer guidelines.

ASE Education Foundation
2017 Automobile Service Technology (AST) Level
VII. Heating, Ventilation, and Air Conditioning (HVAC)
D. Operating Systems and Related Controls Diagnosis and Repair
Task 1

Process/Skill Questions:

- What procedures should be followed to check blower controls and protection devices?
- Where can one find information to diagnose electrical components?
- What are the causes of noises and abnormal smells related to the blower motor components?