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Multiple models matched. Select your model to confirm fit.

88/106mfd 330v rnd start capac

Run Capacitor 370 Volts Round Dual 40/5 MFD

Run Capacitor 370 Volts Round Dual 45/5 MFD

Run Capacitor 370 Volts Round Dual 45/10 MFD

Dual run capacitor, round, 370 volts, 70/10 MFD

Capacitor - 45/370 Single Round

Run Capacitor 370 Volts Round Single 40 MFD

Start capacitor, 330 volts, 135/155 MFD

Run Capacitor 370 Volts Round Dual 30/3 MFD

Run Capacitor 370 Volts Round Dual 40/10 MFD

Run Capacitor 440 Volts Round Single 45 MFD

Run Capacitor 370 Volts Round Single 70 MFD

Run Capacitor 370 Volts Round Single 30 MFD

Run Capacitor 440 Volts Oval Dual 35/3 MFD

Run Capacitor 440 Volts Oval Dual 40/5 MFD
Your WeatherKing AC's capacitor is the spark plug of the system—it delivers the electrical boost your compressor needs to start and run smoothly. When it fails, your unit won't cool, hums loudly, or won't power on at all. Repair Clinic stocks genuine OEM WeatherKing capacitors that restore reliable performance without shortcuts.
Run capacitors handle the continuous load once your system is running, while start capacitors give that initial power surge. Both are equally critical to avoiding costly compressor damage from struggling startups.
Find your exact WeatherKing model number on the nameplate inside the outdoor unit or in your documentation, then select your replacement WeatherKing Air Conditioner parts with confidence. Need help? Enter your model number above to match the correct capacitor specs.
Capacitor problems are among the most common AC repairs, and WeatherKing units are no exception. Below are the details you need to diagnose and fix capacitor issues fast.
A run capacitor stays energized the entire time your compressor operates, smoothing power delivery and preventing voltage spikes. A start capacitor provides one powerful burst to kick the compressor into motion, then disconnects via a relay. WeatherKing systems typically use run capacitors rated 5–80 microfarads (µF), depending on compressor size. Dual-capacitor units combine both functions in one housing for space efficiency.
The metal nameplate on your outdoor unit lists the exact specifications: look for markings like "40µF 370V" or "60+10µF 440V." Never guess—installing the wrong rating can damage your compressor or create safety risks. If the nameplate is worn, your model number unlocks the correct specs in Repair Clinic's database. Write down the model, serial number, and any voltage markings visible before ordering.
Catching a failed capacitor early saves your compressor. A struggling capacitor forces the compressor to work harder, pulling excessive amps and building internal heat. If you replace the capacitor promptly—ideally within the first week of symptoms—your compressor usually survives. Wait months, and thermal damage may be permanent. That's why quick diagnosis matters: a $30 capacitor beats a $1200 compressor.
WeatherKing shares engineering lineage with Rheem and Ruud, so some cross-compatible parts exist, but always verify part numbers. WeatherKing's design specs may differ slightly in mounting bracket style or terminal configuration. Genuine OEM parts ensure exact fit and electrical match, preventing startup delays or nuisance breaker trips that generic replacements can cause.


Ensure your WeatherKing air conditioner performs efficiently with high-quality capacitor parts. Ordering online is simple and convenient, with genuine WeatherKing capacitors available for immediate purchase. Our same-day shipping ensures you get your parts fast, reducing downtime. Utilize our model or part number lookup to find the exact replacement capacitor for your system, and rest easy with our No-Hassle 365-Day Returns and Price Match Guarantee. Address common issues like a faulty capacitor that prevents the fan from running, ensuring your air conditioner cools effectively. For more detailed troubleshooting and repair guides, visit our Air Conditioner Repair Help page. Find additional high-quality WeatherKing parts to keep your system running smoothly by visiting our WeatherKing Air Conditioner Parts section.
On WeatherKing air conditioners, check the outdoor condenser's side cabinet for a rating plate that lists the model number. If it is not visible there, turn off power to the system and look inside the access panel, or check the installation paperwork and owner's manual. Record the complete model number, including letters, numbers, and slashes, then enter it in the search bar to narrow the full WeatherKing air conditioner parts catalog to parts made for your unit. Using the complete model identifier helps account for differences between equipment series and capacities, so you can order with confidence knowing the fit is right.

WeatherKing Air Conditioner problems usually trace back to a handful of common causes, and Repair Clinic's online resources help you find them fast. Symptom articles, diagnostic videos, and part testing walkthroughs guide you through the checks that isolate the failed part. Once identified, look it up by model number and follow the installation guide to complete the fix.

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