Part diagnostics, part physics, part customer service. Year-round work in most of the country and a strong service-call ladder.
Rank
Greenhorn
XP
0
Streak
0
80 XP to Apprentice
The ideas this trade is built on.
How Heating and Cooling Work
Air conditioners do not make cold. They move heat.
The Refrigeration Cycle
Finish the lesson before to unlock
Airflow and Ductwork
Finish the lesson before to unlock
Thermostats and Common Calls
Finish the lesson before to unlock
More units unlock once we know which trades people actually stick with. Depth is earned by data, not guessed.