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The Goodman B1378701 5-Pin Wiring Harness is a genuine OEM electrical connector designed for the APH1560M41AA heat pump and compatible Goodman/Amana packaged units. This harness carries low-voltage control signals between the defrost board, sensors, and outdoor fan circuit, ensuring reliable communication across your system. A cracked, brittle, or corroded harness can cause intermittent faults, no-heat conditions, or erratic defrost cycles — this factory-spec replacement restores clean, consistent connections.
Our OEM harness uses factory pin spacing, wire gauge, and terminal crimps for a guaranteed plug-and-play fit. A generic universal harness may require splicing and hand-crimping, introducing failure points at the connections. For a mission-critical control circuit, OEM is the safer choice.
Easy — DIY friendly. Disconnect power, unplug the old harness, and route the new one to matching connectors. No special tools required. Always de-energize the unit before servicing.