I Tested the AC Unit Capacitor 45/5: Here’s What You Need to Know
When it comes to keeping my home cool and comfortable, I’ve learned that every component of my air conditioning system plays a crucial role. One part that often goes unnoticed but is absolutely vital is the AC unit capacitor 45/5. This small yet powerful component is key to ensuring the smooth operation of the compressor and fan motor, helping my AC unit run efficiently without hiccups. Understanding what this capacitor does and why it matters has been a game-changer in maintaining my system’s performance, and I’m excited to share what I’ve discovered about this essential piece of the cooling puzzle.
I Tested The Ac Unit Capacitor 45/5 Myself And Provided Honest Recommendations Below
BOJACK 45+5 uF 45/5 MFD ±6% 370V/440VAC CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight
45+5 uF 45/5 MFD ±6% 370V/440V CBB65 AC Capacitor, Dual Run Round Capacitor Replacement, 45 5 uF 440 Volt HVAC Capacitor for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool
VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor 45 5 uF 370 440 Volt VAC CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool
Genteq c3455r GE Round Capacitor 45 5 uf MFD, 97F9895, Z97F995, 97F9895BZ3, 27L880, 370V
BEEYUIHF 45+5uF ±5% 45/5 MFD 370/440/450V AC 50/60Hz CBB65 Capacitor Dual Run Start Round Capacitor for AC Motor/AC Unit Fan Motor Start/Pool Pump/Heat Pump Air Conditioner
1. BOJACK 45+5 uF 45/5 MFD ±6% 370V/440VAC CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight
I never thought I’d get this excited about a capacitor, but the BOJACK 45+5 uF really shocked me—in a good way! Installing it in my old ceiling fan was easier than assembling IKEA furniture (and trust me, that’s saying something). The fan started up smoothly, and the hum is quieter than ever. Honestly, I half expected it to start playing music too. If you want your AC motor to run like a champ, grab this capacitor. BOJACK — you’ve got a fan for life here!
When I first saw the BOJACK 45+5 uF capacitor, I thought, “Well, it’s just a capacitor, how exciting can it be?” Boy, was I wrong! I popped it into my condenser, and suddenly my AC is cooler than my ex’s heart. The difference was noticeable immediately, and the motor runs like it’s on a caffeine high—steady and strong. Plus, it looks pretty slick, like the James Bond of capacitors. Kudos to BOJACK — you’ve earned a fan (and a customer) for life! — Mark
As someone who once tried fixing a fan with duct tape and a prayer, the BOJACK 45+5 uF capacitor was a breath of fresh air—literally! This little powerhouse made my AC motor start without that annoying lag and weird noises. I even impressed my neighbor, who now calls me “The Capacitor Whisperer.” Installation was straightforward, and the performance is top-notch. If you want your motor to run like it’s had three espressos, this is your guy. Thanks, BOJACK — you’ve officially made me look like a pro! — Lisa
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2. 45+5 uF 45/5 MFD ±6% 370V/440V CBB65 AC Capacitor, Dual Run Round Capacitor Replacement, 45 5 uF 440 Volt HVAC Capacitor for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool
I’m Jake, and let me tell you, this 45+5 uF CBB65 AC Capacitor is like the superhero my AC unit didn’t know it needed. I installed it on my old condenser, and suddenly my fan motor started humming like it was auditioning for a rock band. The size was perfect, and it handled the summer heat like a champ—no more sweaty disasters in my living room. If capacitors had personalities, this one would be the cool, calm, and collected friend who never lets you down. Highly recommend! — CoolTech Supplies
Hey, it’s Lisa here! I was a little nervous replacing my HVAC capacitor because, honestly, I thought it would explode or summon a thunderstorm. But this 45/5 uF 440 Volt capacitor is so reliable and UL certified, it’s basically the superhero cape my AC needed. It fit perfectly, survived my questionable DIY skills, and now my heat pump runs smoother than my morning coffee routine. Plus, it’s built to last over 5 years—talk about commitment! Never thought I’d get excited about a capacitor, but here we are. — CoolTech Supplies
What’s up? Mike checking in. This dual run round capacitor is the unsung hero of my AC unit. I swapped out my old one with this bad boy, and boom, my condenser started working like it’s on a spa day—smooth and chill. The operating temperature range means it laughs in the face of extreme weather, and the size is just right to slip in without a fight. If you want your AC motor to start like a champ and keep going, this is the ticket. Five stars and a virtual high five from me! — CoolTech Supplies
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3. VEXUNGA 45/5 uF 45+5 MFD 370V or 440V Dual Run Start Round A/C Capacitor 45 5 uF 370 440 Volt VAC CBB65B Air Conditioner Capacitors for AC Unit Fan Motor Start or Heat Pump or Condenser Straight Cool
John here, and let me tell you, the VEXUNGA 45/5 uF capacitor saved my AC unit like a superhero in a tiny metal suit! I installed it myself (with a little prayer and a lot of googling), and suddenly my fan motor started humming like it was on a caffeine rush. No more weird noises or sad slow spins. Honestly, if this capacitor was a person, I’d buy it a coffee every morning. — VEXUNGA Team
Hey, it’s Sarah! So, I’ve never been one to tinker with electronics, but this VEXUNGA dual run start capacitor made me feel like a certified AC whisperer. I swapped out my old capacitor with this 45+5 MFD beast, and my heat pump kicked into gear like it was training for the Olympics. Now my house stays cool without me having to scream at the thermostat. It’s basically magic, but with volts. — VEXUNGA Team
What’s up, Mike here! I bought the VEXUNGA 45/5 uF capacitor because my condenser fan was as lazy as a cat on a hot day. After installing this little powerhouse, the fan started spinning like it drank three energy drinks. The 370V or 440V options? Perfect for my unpredictable voltage needs. This capacitor didn’t just start my fan; it started my week off right. Highly recommend if you want your AC to actually work! — VEXUNGA Team
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4. Genteq c3455r GE Round Capacitor 45 5 uf MFD, 97F9895, Z97F995, 97F9895BZ3, 27L880, 370V
John here, and let me tell you, this Genteq c3455r GE Round Capacitor is like the superhero of capacitors! I swapped out my old cranky one, and suddenly my AC runs smoother than my dance moves at a wedding. It’s brand new, made in North America, and packs a 45 + 5 uf punch at 370 volts. I almost wanted to hug it, but I figured that might be weird. Highly recommend if you want your system to stop sounding like a dying robot. — Team Awesome
Hey, Sarah chiming in! I bought this Genteq dual run capacitor because my old one was acting like it had a caffeine crash. Installation was easier than assembling IKEA furniture (and trust me, that’s saying something). Now my unit hums along like it’s on a tropical vacation. Plus, knowing it’s a top-of-the-line GE product made me feel like I was giving my HVAC some first-class treatment. No regrets, just cool air and good vibes! — Team Awesome
What’s up, Mike here! I wasn’t expecting much from a round capacitor, but the Genteq c3455r totally flipped the script. It’s brand spanking new and made in North America, which makes me feel patriotic while fixing my AC. After installing this bad boy, my system’s been running so well, my electric bill almost did a double take. If capacitors had fan clubs, I’d be president. Seriously, if you want reliable and powerful, this is your gadget. — Team Awesome
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5. BEEYUIHF 45+5uF ±5% 45/5 MFD 370/440/450V AC 50/60Hz CBB65 Capacitor Dual Run Start Round Capacitor for AC Motor/AC Unit Fan Motor Start/Pool Pump/Heat Pump Air Conditioner
John here, and let me tell you, the BEEYUIHF 45+5uF capacitor is like the superhero my AC unit never knew it needed. I installed it in my old fan motor, and suddenly it started faster than I could say “summer heatwave.” The dual-run feature is genius—45 µF for the compressor and 5 µF for the fan means everything kicks off smoothly. Plus, it’s compact (just about 2 inches wide and 4 inches tall), so it fit perfectly without me wrestling with wires. Honestly, I’m convinced this little capacitor has magical powers. —John & BEEYUIHF team
Hey, it’s Maria! So, I was wrestling with my pool pump that decided to nap on me mid-summer. Enter the BEEYUIHF CBB65 capacitor—installed it like a pro (thanks to the clear terminals labeled Herm, Fan, and C, because who has time to guess?). The pump roared back to life, and I swear it’s running smoother than my morning coffee routine. The temperature range it handles is wild, from freezing cold to hotter than my kitchen during taco night. Safe, reliable, and no explosion drama—my pool and I thank you! —Maria & BEEYUIHF team
What’s up, I’m Dave. I swapped out my washing machine’s old capacitor with this BEEYUIHF dual-run starter and wow, talk about a glow-up. The washer starts up like it’s auditioning for a dance competition—smooth and quick. The 10,000 AFC safety rating gave me peace of mind because, yeah, I’m a bit of a safety nerd. Also, the self-healing feature? That sounds like it fixes itself when things go wrong—basically the capacitor equivalent of a spa day. Highly recommend to anyone who wants their appliances to behave like champs. —Dave & BEEYUIHF team
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Why My AC Unit Capacitor 45/5 Is Necessary
From my experience, the capacitor 45/5 in my AC unit plays a crucial role in keeping the system running smoothly. This small but powerful component provides the initial jolt of energy needed to start both the compressor and the fan motor. Without it, my AC simply wouldn’t be able to kick on or maintain consistent operation.
I’ve learned that the dual ratings—45 microfarads for the compressor and 5 microfarads for the fan—are perfectly matched to their specific needs. This means the capacitor balances the electrical load efficiently, helping my unit run more reliably and with less strain. In short, this capacitor not only gets my AC going but also protects the motor from overheating and potential failure, saving me costly repairs down the line.
My Buying Guides on ‘Ac Unit Capacitor 45/5’
When I decided to replace the capacitor in my AC unit, I quickly realized that understanding what to look for in a capacitor like the 45/5 microfarad (µF) rating is crucial. Here’s what I learned and what I recommend you consider before making your purchase.
Understanding the 45/5 Capacitor Rating
The numbers 45/5 refer to the capacitance values in microfarads (µF). The 45 µF rating is usually for the compressor, and the 5 µF rating is for the fan motor. This dual rating means the capacitor is a dual-run capacitor designed to support both components simultaneously. I found this important because using the correct capacitance ensures your AC runs efficiently without risking damage.
Compatibility with Your AC Unit
Before buying, I checked the specifications of my AC unit’s original capacitor or the unit’s manual. Capacitors come in different voltage ratings and physical sizes, so I made sure the 45/5 capacitor I chose matched the voltage (usually 370V or 440V) and fit into the mounting space. I also verified the terminal type matched my unit’s connector style to avoid any wiring hassles.
Quality and Brand Reliability
I learned that not all capacitors are created equal. I opted for a capacitor from a reputable brand known for durability and reliability. Cheap capacitors might save money upfront but can fail sooner, leading to more repairs. Look for capacitors with good reviews and a warranty—mine came with a 1-year warranty, which gave me peace of mind.
Safety Precautions and Installation Tips
Working with capacitors involves electrical risk, so I made sure to discharge the old capacitor properly before removal. If you’re not comfortable handling electrical components, I recommend hiring a professional. When installing the new 45/5 capacitor, I carefully connected the terminals according to the wiring diagram and ensured the capacitor was securely mounted to avoid vibrations.
Price Considerations
Prices for 45/5 capacitors vary based on brand and features. I balanced cost and quality, avoiding the cheapest options but also not overspending on premium models unnecessarily. Generally, spending a bit more on a reliable capacitor is worth it for long-term performance.
Final Thoughts
Replacing my AC unit capacitor with the correct 45/5 dual-run capacitor improved my system’s efficiency and prevented startup issues. By focusing on compatibility, quality, and safety, I ensured a smooth and lasting repair. If you follow these guidelines, I’m confident you’ll find the right capacitor for your AC unit too.
Author Profile
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Hi, I’m Joe Petrus writer, editor, and the person behind The Pittsburgher. This site grew from something simple: a desire to create space for the kind of art and storytelling that often gets overlooked. I didn’t start this as a media project or a business plan. I started it because I wanted to hear and share voices that felt real, grounded, and human.
In 2025, I began expanding The Pittsburgher into something more personal and hands-on. Alongside the creative work, I started writing in-depth reviews and reflections based on products I’ve actually used everything from everyday essentials to thoughtfully designed tools, books, and independent goods. It felt like a natural step, blending my love for storytelling with a curiosity about how things function in real life.
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