Dual Run Capacitor Replacement in Chicago, IL
AC Humming But Won’t Start? This Is Usually Why.
A failed dual run capacitor is one of the most common reasons an air conditioner won’t start in Chicago and one of the fastest, most affordable repairs we make.
If your outdoor unit hums but the fan won’t spin, or your compressor won’t kick on at all, this is almost always the part to blame.
Tabor’s tests it, confirms it, and replaces it — usually in the same visit.
📞 Call (773) 715-3860 or Book Online to schedule a nitrogen pressure test today.
Certified Chicago HVAC Experts You Can Trust
Is This Your Problem?
You likely need a capacitor replacement if:
- The outdoor unit hums but the fan blade isn’t spinning
- The AC clicks on and off repeatedly without starting (short cycling)
- The compressor won’t engage at all
- The system worked fine yesterday and is dead today, with no other warning signs
- It’s been a hot, high-runtime stretch — capacitors fail more often under heavy summer load
If instead your AC is running but just not cooling, start with our AC Not Cooling diagnostic, that’s a different problem with different causes.
What the Capacitor Does
The dual run capacitor gives your compressor and condenser fan motor the electrical jolt they need to start, and helps keep them running smoothly.
It takes constant electrical stress, and Chicago summers with AC units running for hours on end during heat waves, wear them down faster than people expect.
A capacitor that’s a few years old can fail with no warning at all.
What You Get With This Service
- Electrical testing to confirm the capacitor is the actual cause, not a related issue
- Capacitor replacement matched to your system’s exact specifications
- A check of the contactor and wiring connected to it, since failing capacitors sometimes damage these in the process
- A test run of the system afterward to confirm normal startup and operation
- One visit, fixed same day in most cases
We don’t replace a capacitor speculatively, if testing shows the real problem is something else, like the contactor or the fan motor, we’ll tell you and quote that instead.
our clients
Client testimonials
Alex Tseng
4 weeks ago
I highly recommend Alan and TCC to anyone in need of exceptional service. Alan’s responsiveness is truly impressive; I called him this morning and was able to schedule a service for the same day. As a small business owner, Alan demonstrates remarkable knowledge and offers fair pricing, which is invaluable in today’s challenging economic climate. Supporting Alan is a fantastic way to contribute to our community. Give him a call and experience his outstanding service for yourself!
Verna Donovan
4 weeks ago
Alan is amazing. He is quick to respond. Always fixes the problem in the most cost-effective manner and does not try to upsell. And he runs all of his business operations digitally making it so easy to schedule and pay. He is the go-to person for all things HVAC in our neighborhood.
Felecia Stokes
1 month ago
Alan is friendly and knowledgeable about his work. He wasted no time during the process of installing my new AC and kept me updated along the way. A coworker referred him to me and I'm glad I went with Tabor. Thank you!
Doug L
3 months ago
Alan and his team are easy to work with. They are professional from start to finish in addition to being good at their job and luckily reasonably priced. Myself and my neighbors know Alan and have used his company for years. He runs a successful family business which is another reason to call him and not the big guys who overcharge for less service.
Antonio Hill
3 months ago
From start to finish Tabors Complete Comfort did an amazing job, very knowledgeable and professional. They took their time to thoroughly evaluate my HVAC system and clearly explained what was needed to make it more efficient and comfortable for me and my family.
If you’re looking for a company that truly knows HVAC and cares about doing the job right, Tabors Complete Comfort is the one to call. Highly recommended—give them a call today! Thanks for everything!!
If you’re looking for a company that truly knows HVAC and cares about doing the job right, Tabors Complete Comfort is the one to call. Highly recommended—give them a call today! Thanks for everything!!
GP Ramaswamy
3 months ago
We needed two ac units and one furnace for our dual zone townhome. We shopped around for quotes, but we decided to go with Alan because of his competitive quote, knowledge of the products, and quick responses to our text messages.
The project was difficult installation because one of the furnaces is on the top floor of our townhome and the two ac units are on the top roof. Alan's crew had to go up and down the fire escape and ladder to bring in and install new the units.
They did a great job! They did not stop working until all three units were installed. They even came when it was raining. After a couple of weeks, we noticed an unusual sound coming from the new HVAC. I texted Alan and his crew came two days in a row to diagnose and fix problem.
We highly recommend them. Really great work!
The project was difficult installation because one of the furnaces is on the top floor of our townhome and the two ac units are on the top roof. Alan's crew had to go up and down the fire escape and ladder to bring in and install new the units.
They did a great job! They did not stop working until all three units were installed. They even came when it was raining. After a couple of weeks, we noticed an unusual sound coming from the new HVAC. I texted Alan and his crew came two days in a row to diagnose and fix problem.
We highly recommend them. Really great work!
Will Schultz
4 months ago
We had a very good experience with Tabor's. Our thermostat was dead; we called Tabor's at 11 on Saturday, and Alan was out there to take a look by 2. It took him less than half an hour to get everything figured out and to install a new thermostat. At a reasonable price, too!
Heather Malpass
4 months ago
A/C annual maintenance-Exceptional service and attention to detail and his rates are a bargin for what what you get. I highly recommend Tabors Comfort Mechanical.
Anthony Walker Jr
5 months ago
Alan is our go-to guy for all of our heating and cooling needs. He’s always been honest, upfront, and fair with his pricing, which is hard to find these days. He gets the job done right the first time and stands behind his work. You can tell he takes pride in what he does. If you’re looking for someone reliable who knows his stuff, I highly recommend Alan.
Tasha
5 months ago
Excellent customer service! They get the job done right and fast. I fully trust them. They can come to you fast to get you back on track. 10/10 would recommend
Venis Frazier
6 months ago
Mr.Tabor was very professional
And showed up within the timeframe specified. He identified the issue immediately. Thank you so much!
And showed up within the timeframe specified. He identified the issue immediately. Thank you so much!
Eli Barrows
6 months ago
Woke up to a cold house and a furnace with no error codes! TCC was super quick, came out in less than an hour and had everything working before 9am. Courteous, professional, and fast.
Triana Mayers
6 months ago
I appreciate Mr, Tabor so much! He was very professional and definitely got the job done! 100% recommend!!!
KT
6 months ago
Very knowledgeable and honest. Recommend them highly!
Ricardo Izguerra
6 months ago
Tabor helped us with a heater problem, same day service.! Making an emergency repair to help tenants get heat on one of chicago's coldest days he replaced and ordered parts to complete the job. Honest , affordable and professional service that is hard to find these days. I found my new hvac guy. Thank you Tabor.
Cordaro and Desiree Binion
6 months ago
Tabors Complete Comfort did an outstanding job at my home! From start to finish, they were extremely knowledgeable and professional. They took the time to thoroughly evaluate my HVAC system and clearly explained what was needed to make it more efficient and comfortable for me and my family.
They corrected and added proper supply ducts from the furnace and fixed the return airflow issues, ensuring that every area of my home receives consistent heat during the winter months and balanced central air during the summer. The difference in comfort was noticeable right away.
If you’re looking for a company that truly knows HVAC and cares about doing the job right, Tabors Complete Comfort is the one to call. Highly recommended—give them a call today! Thanks for everything!!
They corrected and added proper supply ducts from the furnace and fixed the return airflow issues, ensuring that every area of my home receives consistent heat during the winter months and balanced central air during the summer. The difference in comfort was noticeable right away.
If you’re looking for a company that truly knows HVAC and cares about doing the job right, Tabors Complete Comfort is the one to call. Highly recommended—give them a call today! Thanks for everything!!
Geoffrey&Kenya
8 months ago
I used Tabor's Complete Comfort Mechanical over the past couple years and he was always prompt, professional and went above and beyond. My family and I were without heat on cold Sunday and he came out to troubleshoot the issue and continued to come out until the issue was fully resolved.
Ramone Hankle
8 months ago
Tabor’s Complete Comfort executed the job quickly and efficiently proving a heatless unit with heat in a few days.
Ida Byrd
8 months ago
I just want to thank Alan and his company, he came and did the job, he is good at his craft and I am so thankful I have heat now. Thank you Alan and KUDOS to you and your company. God Bless. Ida Byrd
Nicole Keenon
9 months ago
Always professional, always on time. Thorough, trustworthy - I trust Tabor's Complete Comfort with all my HVAC needs - and anyone who's looking? I confidently refer Tabor's Complete.
Response from the owner 9 months ago
We thank you fir all the years you've entrusted our company with the comfort and care for your home!
Sha'Ron Hill
9 months ago
Always prompt, and professional. I trust Tabor completely. He has been my furnace/AC guy for many years and I would recommend his services to everyone!
Response from the owner 9 months ago
I remember when we first met! You took advantage of our Groupon special and i love the fact, we've been locked in ever since!
Marilyn Joseph
9 months ago
Technician was very polite and respectful and knowledgeable . My problem was resolved the in a matter of hours. I would definitely recommend this company.
Response from the owner 9 months ago
Thank you for being apart of our community and we take pride in serving you correctly
Tamiko N.
9 months ago
Alan has been our mechanical technician for heating and air for years! He is reliable, honest, and always efficient in diagnosing the issue with our appliance and fixing it quickly. Even the routine check ins have been right on time too! Thank you for all you do!
Response from the owner 9 months ago
We definitely appreciate you being apart of our community. We'll definitely continue to live up to your expectations as long as we serve you!
T Brown
9 months ago
My recent experience in having Tabor Comlplete Mechanical was excellent.
Response from the owner 2 years ago
We're thrilled to hear that you had such a positive experience with us! Our team takes pride in providing top-notch service and we're glad to know that we exceeded your expectations. Thank you for your review!
Robin Evans
9 months ago
I’m very happy with the service received from Tabor. Professional, honest & helped to make sure , after evaluating the problem, that we understood what was causing the problem & how to fix it! Pricing was great as well!!! No where near the thousands of $$$ quoted by others advertising on tv for our business & making up problems that don’t exist!! Thank you so much for your honestly & professionalism I will definitely refer your business to others.
Anson Brown
9 months ago
Alan at TCC Mechanical, LLC is fantastic! I had to reschedule my furnace tune-up a couple of times due to family emergencies, and he was super understanding and flexible. When he came out, he was professional, friendly, and did a thorough job. I highly recommend him for any HVAC service!
annette ewing
9 months ago
Allen is a very knowledgeable and reliable technician. He is able to assess the situation and completes the work. He does not over charge and cleans up when he is finished. I recommend him to anyone that is in need of air conditioning or furnace work of any kind. He is truly a blessing.
Carol E Bell
9 months ago
Great pricing, very good customer service, amd prompt responsiveness. Have used them across several years for two furnace units.
Tom Sawyer
9 months ago
Alan is great. When my AC went out, he undertook thorough troubleshooting and fixed the problem on a clear timeline. He’s prompt with service calls and clear in communication. Also an all around nice guy. Couldn’t be happier that I called him up.
working with us
Why choose us
Customer-First Approach
We prioritize your comfort, satisfaction, and peace of mind.
Experienced Technicians
Over 21+ years of trusted HVAC repair and installation.
Fast & Reliable Response
Always on time with same-day and emergency service.
Licensed & Insured Experts
Certified, bonded, and fully insured for your safety.
Honest & Upfront Pricing
Transparent estimates with no hidden costs or surprises.
Book Your Capacitor Replacement in Chicago
Don’t let a dead AC sit through a heat wave waiting on a part that takes minutes to swap. Call (773) 715-3860 or request a service online.