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Avatar for Cool Air Technologies Inc
Cool Air Technologies Inc
4.9(
493
)
Central A/C - InstallCentral A/C - Service or Repair

Serving Fullerton, CA and surrounding areas

Approved

In business since 1996

Free estimates

Warranties offered

"Bill and Trish exceeded the expectations I had from the start. Trish is so pleasant to talk with that you forget quickly you are asking for a service and not talking to a friend. Bill is a craftsman who has many years of experience and he gets right to the point of where your problem lies. In our case the tune up for the summer was not realistic when our 30 year old AC unit had leak issues. Bill and I worked through several scenarios regarding cost of a repair and an investment in a new unit. It made sense to do a new unit and not worry about our old AC unit further breaking down and requiring more repair. Bill and Trish advised us of a cancellation that allowed the new AC unit to be installed 3 days after the service call. Bill and Trish followed through on their quote, and arrival time for installation on time. Everything I was told with a time frame was on time,accurate, and made sense to what I was receiving. Raphael and Nisho were assigned my install and they were no different regarding their punctuality and care for our house. Bill and Raphael took me through the complete process of what would be done and when the project would be finished. Raphael and his crew treated my house well making sure to drop cloths down everywhere they worked. I could not tell they did anything because of the cleanliness in which they worked. The job was made easier as Raphael helped me to clear the work area I was supposed to clear. I was running late in clearing and Raphael helped me to clear the area without complaining or having me do it on my own which was my job. After the installation Raphael walked me through our new AC and also provided valuable recommendations on how to take care of our new unit. What I must stress is everyone from Cool Air Technologies goes above and beyond what they need to in making sure you are 150% satisfied. Raphael helped me pick quality new air filters for our AC on Amazon to make sure we knew exactly what to purchase. Bill followed up that afternoon to ensure I was satisfied and encouraged any questions I might have. The AC unit performs exceptionally. The old unit if I turned it on in the afternoon to cool the house it could only drop the temperature by a degree or 2. Our new unit brought the temperature down from 78 in the house to 74 degrees in less than an hour. We still have 30 year old ducts and vents that do not allow the best air flow so this is a great improvement. Bill installed a new AC that cost me $3,000 less than what I was quoted 2 years ago from another company. My wife and I are extremely pleased with the service provide by Bill, Trish and his crew. I love they are family owned and they have your best interest at heart when they come out and do a job for you. Please use Cool Air Technologies for your service needs. It's such a pleasure when you get to deal with honest hard working local family owned companies that take pride in their work and word they give you."
Additional Photos
Response time2 days
9 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Global Green Solutions
Global Green Solutions
5.0(
248
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+2 more

Serving Fullerton, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Outstanding service! My central AC stopped cooling, and they fixed it the same day. The team was friendly, knowledgeable, and explained everything clearly. Now my system works like new?couldn?t be happier!"
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+24

Response time3 days
10 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for MSP Heating and Air, LLC
MSP Heating and Air, LLC
4.9(
327
)
Central A/C - Service or RepairAir Ducts & Vents - Clean

Serving Fullerton, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Emergency services offered

"We contacted MSP for air conditioning services. Their coustomer ratings on Yelp were great. MSP was able to come out right away. The team from Angel Perez, technician, to the installers, Don and Don and those that work in the office were nothing less than helpful, kind, professional, informative and courteous. The installation process was flawless and took just a few hours. The guys were very friendly but more importantly, they made us feel confident in what they were doing. We worked out the finances which was a very simple and easy process and by the end of the day we had nice cool air flowing on a day that had temperatures in the high 90s. We are very thankful and grateful to MSP Heating and Air Conditioning. I feel certain you would be too."
duct job all R-8 ducting
4 Ton GOODMAN Furnace
customer Vlastos
duct job all R-8 ducting
furnace install

+67

Response time4 hrs
9 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Air Duct Professionals
Air Duct Professionals
4.7(
1,517
)
Air Ducts & Vents - Clean

Serving Fullerton, CA and surrounding areas

Approved

In business since 1990

Free estimates

Warranties offered

"great!!! second time using Air Duct Professionals - Casey arrived promptly, called in advance. Explained everything he was doing, was courteous and professional. Will definitely use this place again and again."
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+11

Response time2 days
1 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Ionel Firuta
Ionel Firuta
5.0(
30
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+2 more

Serving Fullerton, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Emergency services offered

"Oh My Gosh! What an amazing company to work with! I can’t stress enough what a pleasure it was having them in my home! John and Lauren worked smoothly and respectful throughout the day explaining everything to me. This is the first time I’ve had air conditioning. If I could give these gentlemen a 10 Star ⭐️ rating I would, period! You will not go wrong using their services from the price quote to a professional, thorough completed job! Thought it would take 2 days but no only one! Thank you John and Lauren ??"
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project
Heating and Air Conditioning Project
Heating and Air Conditioning Project

+19

Response time10 hrs
Response rate100%
7 neighbors recently requested a quote
Avatar for Trabuco Air
Trabuco Air
4.6(
130
)
Central A/C - Service or Repair

Serving Fullerton, CA and surrounding areas

Approved

In business since 1996

Free estimates

Emergency services offered

"Bill Walker is the tech that diagnosed my faulty condensing unit compressor to be grounded. Sounds like a good thing right? but its not. You never want to hear that. Should you ever do so you want Trabuco Air handling it. I was explained what was wrong and given options that i could comfortably choose from without just breaking the the already shaking bank. Trustworthy and reliable Bill is a cool cat and confident in his skill set. He knows air conditioning extensively and will solve your needs as well. I can finally enjoy the upstairs again thanks to Bill from Trabucco Air."
Response time5 hrs
Recommended by94%of homeowners
Avatar for FIRST CLASS COMFORT HVAC LLC
FIRST CLASS COMFORT HVAC LLC
5.0(
19
)
Central A/C - Install

Serving Fullerton, CA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Jeremy and his team installed my new AC unit, and I couldn?t be happier with the experience. They showed up on time, were professional and friendly, and made sure everything was working perfectly before they left. Highly recommend them for any HVAC or AC installation work!"
FCC HVAC
FCC HVAC
FCC HVAC
FCC HVAC
FCC HVAC

+26

Response time5 hrs
Response rate100%
21 neighbors recently requested a quote
Avatar for Trinity Heating and AC
Trinity Heating and AC
5.0(
10
)
Central A/C - Service or Repair

Serving Fullerton, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"Chris analyzed my entire AC and heating system and explained in detail the pros and cons of performing additional maintenance. I greatly appreciated his description of future potential issues and his recommendations on how to mitigate them. Thank you Chris."
After: brand new furnace with industrial grade filtration system. Re-wrapped ductwork with fiberglass free wrapping and acoustic soundproof closet/return cavity.
After: 2 Stage Variable Speed Furnace installed perfectly!
After: Properly sized, energy efficient, and installed to code.
Before: Homeowner had tried multiple times to get the pilot light ignited.
Before: Old furnace not installed to code.

+31

3 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for All City Plumbing, Air & Electrical
All City Plumbing, Air & Electrical
4.9(
270
)
Central A/C - InstallCentral A/C - Service or Repair

Serving Fullerton, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Emergency services offered

Warranties offered

"I am so glad I did not try to install our new dishwasher myself. Joseph Rand came out from All City Plumbing. We had some difficult existing conditions and our technician finished the job fast, clean and made it look easy. When I call All City back to my home for another job I will request to have Joseph come out.."
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+42

Response time10 mins
16 neighbors recently requested a quote
Recommended by97%of homeowners
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Air Conditioning questions, answered by experts

Yes, through thorough cleaning and inspection, optimizing functionality, and reducing energy use.

To keep your air conditioner in good working condition, you should have it serviced by a professional at least once per year, ideally in the spring before the cooling season begins. If your AC unit is 10 years or older, consider servicing it twice a year (once in the spring and once in the fall) to catch potential problems early and help it reach its full lifespan. During a service visit, a technician will inspect, clean, and replace parts as needed. Regular maintenance helps avoid costly repairs. As a DIY task, you can also clean the evaporator coils annually.

AC evaporator coils should be cleaned at least once per year to keep your unit in good condition. For optimal performance, consider cleaning them twice a year—once before and once after the main cooling season. More frequent cleanings may be necessary for older systems, units with performance issues, or those in climates with high levels of humidity, dust, and dirt.

You should flush your AC drain line once every three months to keep it clear of debris and buildup. Keeping your AC drain line clean prevents clogs, backups, mold growth, and extra wear on your AC unit. If you live in a humid area or have several furry pets, up your cleaning schedule to once a month.

Your AC might not cool after a power outage because of a tripped circuit breaker, blown fuse, or damage to the compressor or capacitor. If you notice your AC not working after a power outage, in most cases, the breaker has tripped or the system has built-in brownout and blackout protection. Reboot the AC by turning it off at the thermostat, resetting the circuit breaker, and waiting 30 minutes to turn the AC on again. 

The Fullerton, CA homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.