Skills Hub
equipment-service
Major Component Replacement
Replace a compressor, coil, metering device, or reversing valve.
About this skill
Major component replacement including refrigerant recovery, brazing with nitrogen purge, leak check, evacuation, and charging. Required any time a system is opened beyond a service valve.
11 total steps
4 critical steps
Time limit: 60 min
What graders are watching for
- 1Recovery must be completed before opening the system
- 2Nitrogen purging during brazing prevents oxide scale
- 3Replace the filter-drier every time the system is opened
Common mistakes (and how to avoid them)
- !Skipping recovery (federal violation)
- !Forgetting the nitrogen purge (oxide scale damages the compressor)
- !Not replacing the filter-drier
Practice this skill step-by-step
The static walkthrough above is the marketing overview. The full step-by-step interactive practice (with critical-step highlighting, per-step "why this matters" rationale, and what graders watch for on each individual step) is unlocked with a subscription.