[UL Certified] BlueStars 35+5 uF 35/5 MFD 370-440VAC Dual Run Round Air Conditioner Capacitor - Fits AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool - Replaces 97F9834 Z97F9834

Capacitors are wear items that are best either proactively replaced before they go bad or, at the very least, you should keep a properly rated spare on hand for when the one in your current AC unit inevitably quits. Furthermore, replacing a capacitor is a job that is well within the average DIY’er with nothing but the most basic tools required. There are plenty of YouTube videos on how to do it and do so safely. That is, unless you want to pay an HVAC repair company $200/$300/$400 or more when your capacitor quits (and it will eventually) on the hottest day of the year. Yes, that is what they charge to replace a capacitor.This Blue Stars brand dual run capacitor arrived promptly and when tested with my Klein MM700 multimeter was almost spot on the label rating and well within the claimed 5% tolerance. Replaced an aging Dayton (Grainger) part number 2MEK3B of the same specifications (50 + 7.5 mfd) in a 20 year old Lennox central air unit (not the original capacitor). The dimensions of the Blue Stars capacitor (both diameter and height) matched the Dayton unit being replaced exactly and were consistent with the product listing. The capacitor being replaced was still working and tested OK so it will go on the shelf as a spare.The capacitor itself is clearly marked (C=common, FAN, and HERM (compressor)). Terminals feel solid as does the metal (aluminum) casing. Did not weigh it but felt as heavy (if not slightly more) than the capacitor it was replacing. The product labeling clearly shows China as the place of manufacture but claims it is UL (USA) and CE (Europe) certified (but I have no way to verify this). Product listing in Amazon states a 100% lifetime warranty. Can’t vouch for that either.When installed and tested, the AC unit fired right up with the new capacitor.Far less expensive than I could find locally (Southwest Ohio). Certainly inexpensive enough to either purchase to have a spare on hand or, like me, proactively swap out an aging part before a problem occurs so I could do it at my convenience and schedule.As noted above, replacing a capacitor is not rocket science and within the ability of anyone that can replace a household light switch. Just make sure you get a capacitor of the right microfarad (MFD) rating for your application and TURN OFF THE POWER before you even think about starting the project. This means either flipping the circuit breaker in the main panel for the AC unit off or using the exterior safety disconnect switch where the AC interconnects to the house power. Simply turning off the switch on the furnace or thermostat IS NOT ENOUGH. Also, a capacitor, even one that has failed, can hold a residual charge and, therefore, make sure you discharge the old unit. Again, there are many videos available on how to do this and do it safely. Do some homework if this is new to you as saving a few dollars is not worth a serious injury or electrocution.Can’t comment yet on durability or service life but will update if it fails prematurely. Otherwise, a good solid product and an excellent value. Five (blue) Stars.DISCLAIMER: I am a member of the Amazon Vine program. This means that I receive some products free of charge to use and review. I only request/accept items I will actually use. My reviews are based on this real-world usage – they are not mere regurgitations of the Amazon product description or insincere hype. I am not a shill and I do not consider the fact that an item was provided without charge as part of my ratings. I have given Vine products one star, five stars, and all points in between. I put serious effort into my reviews and they represent my honest opinion of the product. My hope it they will help someone make an informed, educated choice whether or not a product is right for them.

Great quality, Great Value! Great Packaging and Shipping, Great Appearance, Great Performance and a must for any stock shelves!

Used on my Lennox A/C to replace the same capacitor specs; working perfectly. I replaced a six year old capacitor for preventive maintenance reasons; works great and much cheaper than having an HVAC tech do the simple work.

Every 5-7 years my A/C needs a new capacitor in the outdoor compressor unit. I hate having to pay $200+ just for the diagnosis and then $80-$100 for a capacitor. This was so cheap, easy, and fast. It was amazing. Also, even if you don't know this is your problem, it is so cheap it is worth a shot. Be sure to turn off electricity and remember that capacitors store charge and you'll be fine. If your fan doesn't run when the unit is on, odds are this cheap part will fix your A/C.

This capacitor works great. I fixed my air conditioner without any problems, and even ordered a couple of them for the future.However, there is a big inaccuracy in its description: its diameter is not 2.16, but about 2.5 inches. I searched online for both a capacitor and a mount for it, and because of this mistake, I ordered the wrong mount from eBay.I attach two pictures: the description versus the actual size.Please fix it!

A replacement capacitor was a cheap way to try to solve my dishwasher motor that was struggling to spin up from a stop. When I got it, I had to cut down the terminals to fit the existing connectors. The cap itself has four tabs on each terminal, and I wish two of them were narrower to be a better drop-in replacement for other common appliance capacitors.In any case, I ended up replacing the motor, and because I already had this capacitor, I left it in with the new motor. It's working great, motor starts and runs quietly, just like when the dishwasher was new.

I was given a quote of $146 to replace this condenser fan capacitor. It was starting to fall out of spec. The cost of this one was $12.86. I pulled the AC condenser breaker bar, turning off power. I removed the access panel on the corner of the Trane condenser. I took a picture of the wires on the top of the capacitor. I used a plastic handle screwdriver to short all connections on the old capacitor. I removed one screw of the strap. I removed the wires and the old capacitor. I re-installed the wires in their correct position. I installed the new capacitor, strapping it in replacing the one screw. I replaced the access panel, making sure not to pinch any wires. I replaced the AC breaker bar and went inside and turned on the AC. The condenser fan is purring like a kitten. The next time a capacitor starts to fail, I'll replace it the same way.

This an exact replacements for the cap in my new AC unit, I’ll keep it on hand for the day I need and I won’t have to call in a repair man at short notice and 3hr minimum who’ll want 5 or 6 x what I’ve just paid for it plus the labour of course.

We use as replacement for existing capacitors on furnaces older than 10 years before the installed ones fail. If the installed ones fail we also have to replace the motor as it does not start without a working capacitor.

Worked like a charm

Installed in Nov 2022, started failing in Feb 2024.I noticed that the furnace blower took longer than usual to get running up to its normal speed.Took it out, tested it and it does indeed show only 7.2uf on my multimeter.I think the days of capacitors lasting anywhere between 10-12 years are long gone.On my RUUD furnace, the first capacitor lasted ~10 years.Now it's one every 18-36 months.

Good choice as a substitute for OEM in dehumidifier