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AfterRheem Capacitor Replacement: The Los Angeles Owner’s Guide
Rheem capacitor replacement in Los Angeles typically runs $175-$385 installed, parts and labor included, and we stock Rheem-compatible capacitors on our trucks for same-day service in most LA neighborhoods. A capacitor is the small cylinder inside your outdoor AC unit that stores and releases the electrical charge your compressor and fan motor need to start. When it fails, the usual story is an AC that hums but won’t turn on, a fan that spins slowly, or a system that runs for 20 minutes and trips the breaker.
Which Rheem Models This Applies To
Rheem builds its residential AC and heat pump lines around several series families, and the capacitor spec varies by model. The RA13, RA14, RA16, and RA17 air conditioner series each use dual-run capacitors rated in microfarads (µF), commonly 35/5, 40/5, 45/5, or 50/5, with the first number serving the compressor and the second the outdoor fan motor. Rheem’s RP14 and RP15 heat pumps pull from the same capacitor family, though you’ll occasionally see 55/5 on larger tonnage units in Los Angeles homes with 4- and 5-ton systems.
The make-or-break detail is not just the rating, it’s the shape. Rheem uses both round and oval capacitors depending on the chassis, and a round 45/5 will not mount cleanly where an oval 440V unit came out. We also flag the voltage rating: Rheem specifies 370V or 440V capacitors, and installing a 370V in a 440V slot is a common but short-lived mistake. If you’re confirming what you have, read the label on the capacitor body itself, it lists µF, voltage, and shape plainly. Rheem OEM capacitors are reliable, but quality aftermarket equivalents from AmRad and Titan (which we stock) meet or exceed the OEM spec and often carry a 5-year manufacturer warranty. Coldharbour Heating & Air is an independent service provider, not affiliated with Rheem, and we stock parts for Carrier, Trane, and Lennox systems as well.
Signs Your Rheem Capacitor Replacement Is Failing
- AC hums but won’t start. You hear a low electrical buzz from the outdoor unit but the fan blade isn’t moving. The capacitor no longer holds enough charge to kick the compressor or fan over, and that hum is the motor stalled at the starting line.
- Fan spins slowly or only after a push. The capacitor feeds the fan its running voltage. When it weakens, the fan lags or needs manual help to spin, which is a classic sign the µF reading has dropped below factory spec.
- System trips the breaker after 15-30 minutes. A failing capacitor makes the compressor work harder to start each cycle, drawing higher amperage than the circuit tolerates. This is especially common in Los Angeles in late afternoon when attic temps push system load to its peak.
- Unit runs but delivers warm air. The fan motor runs on residual power but the compressor isn’t engaging. You’ll feel outdoor air moving but nothing being conditioned, and the compressor shell will be hot to the touch.
- Bulging, swollen, or leaking capacitor body. If you look at the capacitor and it’s rounded on top rather than flat, or you see a small oil residue, that’s the failure you can see. Los Angeles heat is hard on capacitors; sustained 95°+ days near the San Fernando Valley can push an already-aged capacitor out the door.
Replacement Cost & What’s Included
Most Rheem capacitor replacements in Los Angeles run $175-$385, installed and guaranteed. The lower end covers a single-run capacitor swap on a smaller system where the part is a standard 35/5 or 40/5. The upper end reflects dual-run capacitors for 4- and 5-ton Rheem units, oversized 440V specs, or heat pump systems requiring a capacitor and hard-start kit. Every job includes the new capacitor, removal and safe disposal of the failed part, a full check of the contactor and wiring connections, and a system start-test before we leave. That price is handed to you in writing before any work begins, and it holds. If the replacement fails inside 365 days, we come back and correct it at no charge under the Done Right Promise.
DIY or Call Us?
Here’s the straight version: a capacitor stores enough voltage to seriously injure you even after the unit’s power is off at the breaker. The terminals can hold a charge for what feels like forever, and the wrong move sends it through you. If you’re a homeowner who wants to check something, check the outside: is the breaker on, is the disconnect box engaged, is the fan blade obstructed. Beyond that, leave the electrical to someone with the right tools and training.
Victor Mancini grew up in Boyle Heights and studied HVAC/R at Los Angeles Trade-Technical College, and his rule for capacitor work is simple: tell me what it’s doing, and I’ll tell you what it needs - no guessing, no padding the ticket. We’ll have a technician at your door with the right capacitor on the truck, a written price in hand, and the swap done inside an hour. Call (817) 402-2972 and a live person will answer, day or night.
FAQs
A Rheem capacitor typically lasts 5-10 years, but sustained Los Angeles heat, voltage spikes from Edison, and short cycling in peak summer can cut that to 4-6 years. If your unit sits in direct afternoon sun, which is common in the Valley, plan for replacement roughly every 5 years.
No, capacitors are sealed, non-serviceable components. When they fail, replacement is the only repair. We don’t rebuild them, no one reputable does, and a failed capacitor left in place will eventually take out the compressor or fan motor with it.
The swap itself takes 30-60 minutes on most Rheem units. We’ll have eyes on the system, the capacitor swapped, and the unit running before the hour is up, barring any wiring issues we find along the way.
Yes, we stock the most common Rheem dual-run capacitors (35/5 through 55/5, round and oval, 370V and 440V) on our service trucks, along with quality aftermarket equivalents from AmRad and Titan. In most Los Angeles neighborhoods, we can complete the replacement same day.
Written by Victor Mancini, Owner & Lead HVAC Technician, Coldharbour Heating & Air at Coldharbour Heating & Air, serving Los Angeles and nearby areas.