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Get your free estimateRheem Capacitor Replacement: The Las Vegas Owner’s Guide
A Rheem capacitor replacement in Las Vegas typically runs $150 – $260 installed, parts and labor included. We stock dual-run and start capacitors that match Rheem’s spec sheets, and we can usually have your system cooling again the same day you call. Most homeowners figure out the capacitor has failed when the outside unit hums but the fan won’t spin, or when the compressor clicks and shuts off a few seconds later.
Capacitors are the small metal cylinders that give your Rheem’s fan motor and compressor the electrical shove they need to start. In a Las Vegas summer, these parts work brutally hard. The heat doesn’t just wear them out faster, it exposes a weak capacitor early. When ours fail, you’ll know within a minute of walking outside.
Which Rheem Models This Applies To
We replace capacitors across Rheem’s residential lineup: the RA series, the Classic and Classic Plus lines, Prestige units, and Rheem heat pumps from the 2-ton up through 5-ton residential range. The part itself is not a one-size-fits-all situation. Rheem units use two main types: a dual-run capacitor that powers both the fan motor and the compressor from a single cylinder, and a start capacitor that kicks in only during startup and drops out once the compressor is running.
Here’s the compatibility gotcha that trips people up: Rheem serial numbers won’t tell you which capacitor you need. You have to read the capacitor body itself. It will carry a microfarad (µF) rating, something like 45/5 µF or 35/5 µF, plus a voltage rating, usually 370V or 440V. The replacement has to match the microfarad rating within 5% and meet or beat the voltage. In Las Vegas, where compressors run hotter and longer, we install 440V-rated capacitors even in units that shipped with 370V parts. The higher voltage rating gives more headroom in the heat, and it doesn’t change how the system runs one bit.
OEM Rheem capacitors are solid parts, but they’re also a commodity inside a branded box. We carry OEM-equivalent aftermarket capacitors from manufacturers like Titan and Genteq, which meet or exceed Rheem’s specifications. We’re an independent service provider, not a Rheem dealership, so we’re free to stock whichever capacitor is the better value for you, not whichever one carries the right label. For older Rheem units past their parts support window, aftermarket is sometimes the only option, and it’s a good one.
Styles & brands we work with







Signs Your Rheem Capacitor Replacement Is Failing
- The outside unit hums but the fan won’t turn. That hum is your compressor and fan motor trying to start without the electrical kick they need. This is the single most common capacitor failure we see in Las Vegas, and it happens on the hottest afternoons when the system is working hardest.
- The AC starts, runs five or ten minutes, then shuts off. A capacitor that’s drifted out of spec can start the compressor but not hold it under load. As compressor pressures build, the motor strains, draws more amps, and trips a safety switch. You’ll get short cycling that never satisfies the thermostat.
- A bulged or swollen capacitor body. When a capacitor overheats, the metal case expands. If you see a cylinder that’s no longer flat on top, or one that has leaked a small amount of fluid, the part has already failed mechanically. It’s not coming back.
- The fan spins slower than it used to. A weak capacitor can still run a fan, but at reduced speed. Lower airflow across the condenser coil means higher pressures and a hotter compressor. If the air coming off the top of the outside unit feels weak or lukewarm, suspect the capacitor before you do anything else.
- The compressor clicks on startup, then nothing. That click is the contactor closing. When the capacitor can’t deliver the starting torque, the compressor draws locked-rotor amperage for a split second and the overload protects it by shutting everything down. Repeated attempts can damage the compressor itself.
See the difference
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After
Before
After
Before
AfterReplacement Cost & What’s Included
In the Las Vegas market, we quote most Rheem capacitor replacements between $150 and $260 all-in. That includes identifying the failure on site, matching the replacement to your Rheem’s exact microfarad and voltage specs, installing it, testing the system’s startup under load, and confirming the compressor and fan are drawing within normal amperage afterward. It’s not just a part swap, it’s a verification that nothing else contributed to the failure.
The price range comes down to a few things. Dual-run capacitors cost more than single-rating ones. Start capacitors used on larger Rheem compressors run at the higher end. And some Rheem units have both a start and a run capacitor, which means two parts instead of one. Whatever the exact number, you get a written price before we touch any tool, and the repair is covered by the 365-Day Done Right Promise. If that capacitor fails inside a year, we come back and replace it at no charge. The guarantee is on paper before we leave.
DIY or Call Us?
Here’s the honest truth: a capacitor holds a charge even with the power off. Touch the terminals the wrong way and you’ll get a shock that can throw you across the room. This is not a part to guess at. The capacitor body will tell an experienced tech the spec in ten seconds, and the wrong replacement either won’t start the motor or will damage it.
What you can safely do is look at the capacitor through the unit’s access panel. If it’s bulged or leaking, you’ve found your problem and you can tell us exactly what you saw when you call. That saves a diagnostic step. If you see burn marks or a wiring connector that’s melted, don’t touch anything and cut power at the breaker. From there, call (725) 726-3813. Tell me what it’s doing, and I’ll tell you what it costs – no guesswork, no runaround.
FAQs
A Rheem capacitor in the Las Vegas climate typically lasts 6 to 10 years, but extreme heat can shorten that to 5 or fewer. The repeated 100-plus degree days mean the capacitor never fully cools down between run cycles, and heat is the enemy of the dielectric material inside the part.
No. A capacitor is a sealed, non-serviceable component. Once the dielectric material inside has broken down or the case has swollen, the part is done. Replacement is the only repair, and it’s one of the least expensive repairs we make on a Rheem system. Call (725) 726-3813 and we’ll get you an exact quote before any work starts.
The swap itself takes 20 to 30 minutes on most Rheem residential units. With diagnostic testing before and amperage verification after, expect the whole visit to run about an hour from arrival to a signed work order. We stock the common Rheem ratings on our trucks.
We stock the capacitors used by the Rheem systems we see most often across Las Vegas, including 35/5, 40/5, 45/5, and 50/5 microfarad dual-run ratings, plus common start capacitors. There’s occasional need for a specialized rating we don’t carry, but in practice we complete most Rheem capacitor replacement jobs on the first visit.
If your Rheem system is humming, short-cycling, or blowing warm air, call Cold Harbour Heating and Air Las Vegas at (725) 726-3813. We’ll give you a straight answer, a written price, and a real repair. Phones are answered around the clock by a live person.
Written by Victor Mancini, Owner, Cold Harbour Heating and Air Las Vegas at Cold Harbour Heating and Air Las Vegas, serving Las Vegas and nearby areas.