An air conditioning capacitor is typically blown or destroyed by a combination of extreme operating heat, electrical grid power surges, and excessive mechanical load. Capacitors rely on internal dielectric films and electrolytic fluids that degrade rapidly when exposed to excessive ambient summer temperatures inside outdoor condensing units baking in direct sunlight. Furthermore, lightning strikes, brownouts, and sudden grid voltage fluctuations create intense electrical spikes that puncture the delicate internal foil layers. Additionally, if your compressor or fan motor has worn bearings or dirty condenser coils that force it to draw high electrical current, the extra strain accelerates capacitor failure. You can protect your system with a dedicated surge protector and annual coil cleaning. You can verify protection when electrical components remain stable.
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