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GOODMAN GSXC18 Loud Buzzing Wont Turn On

CONF DIAGNOSIS ACTION
91%
CONF
Dual Run Capacitor
The capacitor provides the necessary phase shift to create a rotating magnetic field in the compressor and fan motor windings. Failure of this component results in a stationary magnetic field that causes the rotor to vibrate (buzz) without rotating, leading to thermal overload. This is the statistically dominant cause of buzzing in split-system condensers.
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5%
CONF
AC Contactor
The contactor is an electromagnetic relay that bridges high-voltage power to the system components. If the contact points are pitted or the solenoid coil is failing, it will oscillate rapidly (chatter) or hum loudly, often failing to pass sufficient current to the compressor and fan motor.
SKU: CONT2P030024V
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4%
CONF
Hard Start Kit
In high-efficiency units like the GSXC18, the compressor may struggle to overcome high head pressure or static friction as the unit ages. This kit provides an additional capacitance boost during the first few milliseconds of startup to break the rotor loose from a stalled state that otherwise results in buzzing.
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DIY Repair Guide

Watch exactly how to replace the Dual Run Capacitor.

// NOTICE: This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.

PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.

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