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The Goodman B1378701 5-Pin Wiring Harness is the genuine OEM connector assembly for AEPT030 series air handlers. This 5-position harness carries power and signal between the control board and a component sub-circuit, ensuring reliable, correctly keyed connections inside the air handler.
This genuine OEM harness ships pre-terminated with the exact 5-pin keyed connector and factory conductor colors, eliminating guesswork. Generic substitutes risk reversed pins and intermittent connections that trigger nuisance faults.
Difficulty: Easy. Unplug the old harness and snap in the replacement — the keyed connector only seats one way. Power down the unit first; most replacements take under 15 minutes.