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The genuine Goodman B1378700 is a 16-pin wiring harness for the AEPT060-00C-1A air handler and compatible Goodman/Amana models. This factory-terminated loom carries control and power signals between the control board and the air handler's components through a keyed 16-position connector. Melted pins, broken locking tabs, or corroded terminals cause intermittent operation, error codes, and no-heat/no-cool faults — a fresh OEM harness restores reliable connections.
This is the genuine Goodman OEM harness with the correct pin count, keying, and wire gauge. Generic or hand-built harnesses risk mis-pinning and poor crimps that can damage the control board. OEM plugs in directly — no splicing or guesswork.
Moderate (3/5) — Disconnect power and label connections before unplugging. The keyed plug seats one way; route the harness clear of moving parts and confirm the locking tab clicks home.