Introduction to Heat Pump Service
Learn how a heat pump runs the refrigeration cycle in both directions, how reversing valves and defrost boards work, and where auxiliary electric heat fits in. After finishing you can tell a heat-pump failure apart from a straight-cool AC problem.
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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 availa...
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