Boy oh boy, this can be such a touchy subject. I just had to talk about it.
There are a few things that consistently fail on an air conditioner in the Arizona heat.
- Contact sensors
- Clear outs for drain lines
- Capacitors
I’ll get to the others ones at another time. Today, I want to talk about the biggest culprit: capacitors.
What is a capacitor?
an HVAC capacitor is a vital component that ensures the smooth and efficient operation of your air conditioning and heating system by providing the necessary power boost and stabilizing voltage. Without a properly functioning capacitor, the system’s motors may fail to start or operate inefficiently, leading to performance issues and equipment damage.
HVAC systems use different types of capacitors to ensure efficient motor operation. Start capacitors provide a quick, powerful energy boost to help motors, like compressors and fan motors, overcome inertia during startup, but they are only engaged temporarily and have a shorter lifespan due to the high stress.
Run capacitors, on the other hand, remain active throughout the motor's operation, delivering a continuous, stable energy flow to components like compressors, condenser fans, and blower motors, resulting in improved efficiency and a longer lifespan.
Dual-run capacitors combine the functionality of two capacitors in one unit, serving both the compressor and fan motor, with three labeled terminals—C (Common), HERM (Compressor), and FAN—making them a compact and efficient solution for residential HVAC systems in Arizona.
What makes up a quality capacitor?
A high-quality AC capacitor is defined by its durability, efficiency, and reliable performance under demanding conditions.
When selecting an HVAC capacitor, durability, longevity, precision, and safety are key factors to consider.
A capacitor in Arizona must withstand extreme temperatures and voltage fluctuations from our aging power grid. While a typical capacitor is rated to withstand temperatures up to 70°C, Arizona requires superior protection up to 105°C.
Oil-filled designs enhance longevity by dissipating heat more effectively, while capacitors with advanced dielectric materials ensure extended operational lifespan. This means less chance of your capacitor failing with wild power fluctuations of catastrophic failure of the capitor or your entire HVAC system.
Precision is equally important, as consistent capacitance values and tight tolerance ranges (±5%) are critical for optimal motor performance. Capacitors with built-in surge protection can safeguard both the capacitor and connected components from voltage spikes, further enhancing reliability, longevity, and durability.
We only use American made products that are UL-listed with a proven track record in residential HVAC applications.
What Capacitor Should I Buy?
Choosing the right capacitor for your HVAC system is crucial to ensure its performance, longevity, and reliability—especially in challenging environments like Arizona. With hundreds of capacitor shapes, sizes, and quality levels available, finding the perfect match can feel overwhelming. Here's a guide to help you make an informed decision.
Key Features of a High-Quality Capacitor
1. Durability
Your capacitor must withstand high temperatures, voltage fluctuations, and harsh environmental conditions. For extreme climates, opt for models rated for 105°C, as they significantly outperform standard 70°C options in durability and performance.
2. Longevity
Capacitors with oil-filled designs dissipate heat more effectively, making them last longer. Additionally, those with enhanced dielectric materials can extend the operational lifespan of your HVAC system by reducing wear and tear.
3. Precision
Consistent capacitance is critical for efficient motor performance. Capacitors with tight tolerance ranges (e.g., ±5%) ensure your HVAC system operates smoothly without unnecessary stress on the motor.
4. Surge Protection
Built-in surge protection is essential for guarding against voltage spikes, which can damage your capacitor and HVAC components. This feature prolongs the life of your equipment and saves you from costly repairs.
5. Universal Compatibility
Consider capacitors with adjustable capacitance, which make them compatible with a wider range of HVAC systems. These dynamic capacitors simplify replacements and reduce inventory needs.
6. Reputation and Certification
Always choose capacitors that are UL-listed or certified by other reputable safety organizations. Opt for brands with a proven track record in the HVAC industry for added peace of mind.
Why Professional Installation Matters
Replacing a capacitor isn’t just about finding the right one—it’s about ensuring it’s installed safely and correctly. Capacitors come in many shapes, sizes, and voltage ratings, and installing the wrong one can put your equipment and safety at risk.
While electrical engineers, electricians, and HVAC technicians can confidently handle capacitor replacements, the average homeowner should leave this task to the professionals. Hiring an expert ensures proper installation and protects your system—and yourself—from harm. After all, the real value lies in ensuring you can enjoy cold air safely and reliably.
What to Look For When Buying a Capacitor
1. Reduce Stress on Equipment
Choose a capacitor that minimizes wear and tear on your HVAC system. A high-quality capacitor reduces strain on components, leading to fewer breakdowns and a longer system lifespan.
2. Dynamic Performance
Select a capacitor capable of regulating electricity smoothly. This feature ensures consistent performance during startups and prevents electrical issues.
3. Warranty and Support
Invest in a capacitor with a solid parts and labor warranty. This protects you from premature failures and ensures you won’t spend money unnecessarily on replacements.
How much should an AC capacitor cost in 2025?
You can purchase capacitors for whole home Air Conditioning systems for as little as $12 upon our last inspection on Amazon. The most expensive AC capacitor price I have ever seen was $999, though atrociously overpriced.
To get a cheap capacitor installed, honest companies will charge $119 to $199. Unscrupulous companies will charge you upwards of $700! And that’s for the cheap garbage. A typical cheap capacitor sold by a greedy or inefficient company will charge between $320 and $450.
As you've probably guessed, I seel the good ones. In fact, I’ll only sell these capacitor because it has everything that a capacitor should have to protect your system and your wallet in Arizona.
In fact, I believe in this capacitor so much, we even replace the cheap capacitors installed from factory on DAY ONE. I am so confident in these capacitors, I’m willing to not only put my name on them, but I’m willing to put 5 and 10 year parts and labor warranties on them.
I’ve calculated over and over again that it is actually the least expensive capacitor in the market when you factor in how rarely you have to replace it.
In fact, my capacitors are so good, they boasts a 0.5% failure rate within the warranty period, which is 500% to 1000% longer than its cheaper cousins.
My Fix it Five Caps come with an exclusive 5 year parts AND labor warranty, while my upgraded Smart Start Caps boast a whopping 10 year, parts AND labor warranty!
On sale exclusively at Fix it Frankie, after our 10% Family Member discount, you pay $599 for Fix it Five Caps, and, $799 for Smart Start Caps, installed and warranted.
When you eventually need to buy a new AC system from me, they’ll be included in your purchase from day one, and match your new system’s warranty in full.
And here's the best thing. They are gentler on your HVAC system, too.
That means less stress. Less repairs. Less worry. And less fussing around with repair guys when you could be out living your best life instead!
So that’s how I’ve decided to run my AC repair company.
My name is Frankie , and I’d love to be your AC Repair Guy.
