Title: Identify the basic sequence of operation of a gas furnace.
Course: Heating, Ventilation, Air Conditioning, and Refrigeration II (17056-II) > Section: Servicing and Maintaining Fossil Fuel Heating Systems

Identification should include

- internal safety checks
- ignition
- blower operation.

Process/Skill Questions:

- Why do certain components operate in a certain order?
- How does knowledge of the sequence help during the troubleshooting process?