HVAC
Gas Furnace Service
Installing, starting up, and servicing atmospheric and 90%+ condensing gas furnaces in residential and light commercial work. Covers combustion analysis and CO measurement, flame rectification and sensor cleaning, inducer and pressure switch diagnosis, and replacing igniters, flame sensors, gas valves, and limit switches to manufacturer spec.
2
paths
5
guides
Learning Paths
Choose a path that matches your experience level and work toward mastery at your own pace.
Beginner Friendly
1 path
Start here
Learn how atmospheric and high-efficiency condensing gas furnaces work, the main components you will service, and the combustion safety r...
Intermediate
1 path
Service modern residential gas furnaces the way a heating tech does: the 80% AFUE atmospheric vs 90%+ AFUE condensing distinction, the fu...