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The Goodman B1378700 16-Pin Wiring Harness is a genuine OEM control harness built as a direct-fit replacement for the APH1530M41AA package heat pump and compatible Goodman/Amana systems. This 16-pin harness carries the low-voltage control and sensor signals between the integrated control board and the unit's components. Pre-terminated with the correct connector and pin-out, it restores clean, reliable communication when the original harness is chafed, corroded, melted, or has intermittent connections.
This OEM harness arrives with the exact 16-pin connector, wire gauge, lead lengths, and pin assignments your control board expects — so it simply plugs in. Building a substitute from bulk wire and generic connectors risks pin-out errors, loose crimps, and control faults that are difficult to diagnose. The factory harness eliminates guesswork and ensures every circuit lands where it should.
Difficulty: Moderate. With power fully disconnected, photograph the existing routing, unplug the old harness at both ends, and route the replacement along the same path before reconnecting. No refrigerant work is required, but correct connector orientation and secure seating matter. If you are unsure about control wiring, have a qualified HVAC technician perform the swap.
Restore dependable control communication to your APH1530M41AA with the genuine Goodman B1378700 harness.