HVAC
Heat Pump Service
The parts of refrigerant work that only apply to heat pumps: reversing valves, defrost cycles and boards, auxiliary and emergency electric heat strips, cold-climate variants, and verifying charge in heating mode when subcool isn't available. Includes distinguishing a true heat-pump failure from a straight-cool AC problem so you don't replace the wrong component.
2
paths
6
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 a heat pump runs the refrigeration cycle in both directions, how reversing valves and defrost boards work, and where auxiliary ...
Intermediate
1 path
Service air-source heat pumps with real understanding, not guesswork: O vs B reversing-valve wiring, demand and time/temperature defrost ...