Get matched with top air conditioning pros in Pasadena, CA

Q: Can an overheated compressor cause a fire?

• <div><p>Yes, it is possible. An electrical fire can break out if the compressor has inadequate ventilation. When it overheats but doesn't have a proper thermal cutout, this can cause the motor to short-circuit and catch fire. This risk is exacerbated if flammable materials, like dust and fallen leaves, are clogging the unit. The compressor overheating won't start a fire by itself, but poor maintenance and installation can increase the risk once it hits its breaking point and short-circuits.</p></div>

Q: Why is my home hotter than outside?

• <div><p>High humidity, bad insulation, warmth from sunlight, and poor circulation are all reasons your home&rsquo;s hotter inside than out. While this is what you want in the colder months, summer can become unbearable if this is a constant. Try to find the cause, but you need to remember that issues like this require a permanent fix (unless you want to bear down during the summer months).</p></div>

Q: Should you buy a house with a 15-year-old HVAC?

• <div><p>You can buy a house with a 15-year-old HVAC system if you inspect the system for performance and budget for a replacement within the next three years. You can also negotiate the price with the sellers. Ask to look at the unit&rsquo;s maintenance records and energy bills for the last two years to determine the shape of the HVAC system and its operating costs. Spend time in each room of the house to gauge if the HVAC keeps the home at a consistent temperature throughout. </p></div>

Q: Will low refrigerant cause a coil to freeze?

• <div><p>If refrigerant levels are low, it can cause the evaporator coil to freeze up. Low freon causes a drop in pressure, which will make the coil too cold and cause moisture to freeze on the coil. Your system may be <a href="https://www.angi.com/articles/does-freon-leak-mean-i-must-get-new-home-ac-unit-cant-i-just-get-leak-fixed.htm">low on refrigerant because of a leak</a>. </p><p>Make sure to have maintenance performed twice a year, and contact your local HVAC technician if you suspect your system has low freon levels. </p></div>

Q: Are ventless AC units good?

• <div><p>If you&rsquo;re looking for a portable, budget-friendly cooling solution that doesn&rsquo;t require any venting or installation, a ventless AC system is a good option. Similarly, this is a great choice if you&rsquo;re renting an apartment or home and aren&rsquo;t allowed to make large, structural changes like installing comprehensive HVAC, or you&rsquo;re in a shared space and only need to cool your own room. </p></div>

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Verified Reviews for Air Conditioning pros in Pasadena, CA

*The Angi rating for Air Conditioning companies in Pasadena, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.

*The HomeAdvisor rating for Air Conditioning companies in Pasadena, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.

Last update on August 11, 2026

Reviewed in August 2026
Mario installed an air conditioner. As well, we had some serious electrical issues that he was able resolve. He did a great job, and gave us a great price. We would hire him again, and would recommend him.
Mario Marrufo
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Reviewed in May 2026
Came within half an hour of calling them for a free estimate, and diagnosed and fixed the problem with my AC compressor within an hour.
Progressive Air, Inc.
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Reviewed in June 2025
The guys came to the house and proceeded to disconnect the compressor unit. the crane came the whole replacement didn't take more than 30 minutes. We had some problems with the air handler, only because of the space available. But the guys did it and got the replacement in. It took a long...
SO CAL BOYS HEATING & AIR INC
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Reviewed in May 2025
I contacted Climafresh. I needed to install two mini splits for my children's room. It was a very professional job. They sold me the air conditioners at a good price. I am very happy with their work. Thank you, Leo.
ClimaFresh HVAC
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Reviewed in July 2024
Love these guys! Theyâ re so knowledgable and efficient! I call them any time I have issues with my air conditioning!
Battle Born Air Conditioning & Heating
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Reviewed in July 2023
Under the leadership of Dean Ladon, we had an awesome experience with him from the time we met him to get a quote and installation of a Daikin mini split air conditioner in our dining room and installation of a window air conditioner in the upstairs hallway. His crew were all friendly and...
Efficiency Air, Inc.
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Reviewed in June 2023
SoCal Climate Control Installed my central air a couple years ago and did such a great job that I had them back to do my mini-split systems too. Excellent service and quality of workmanship. Highly recommended!
SoCal Climate Control & Mechanical, Inc.
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Reviewed in March 2022
This is an HONEST and TRUSTWORTHY company! Our dryers upstairs and downstairs were not drying clothes without running the drying cycle two or three times. I looked for someone who could clean our dryer vents and called Air Duct Cleaners. They came the next day. They had quoted me a price for...
Safe House
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Reviewed in August 2021
Highly recommend MB Heating & Air. They did a fantastic job installing everything at our house in Pasadena. Mark came out the day after we called him and we discussed the best setup for our house. Then he knocked it all out in just a few days. He and his crew were professional throughout and did...
MB Heating and Air
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Reviewed in April 2021
So many GREAT things to say about Air-Tech. First, I had a split system installed on one side of a duplex about 10 years ago. It was permitted and passed. Less than a year later I learned there were leaks/problems with it. The original installer wouldn't come back as they no longer worked in...
Air-Tech Air Conditioning & Heating Inc
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Find Air conditioning pros in Pasadena

Global Green Solutions

5.0(

248

)

Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Install - For Business+2 more

Serving Pasadena, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Very happy with the new installation, replacement, and repair services for heating and air conditioning! The technicians were courteous, well-informed, and on time. They promptly resolved the problem and provided comprehensive explanations. A truly professional and trustworthy crew. Strongly suggested!"

+24

Response time3 days

7 neighbors recently requested a quote

Recommended by7%of homeowners

Request Quote

AC Dave Heating & Air

4.9(

)

Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"I had AC Dave preform three jobs for me over the past few years. (1) New ducts a few years ago. (2) Installed a mini-split heat pump in master bedroom this year. (3) Then a few months later I had him remove my old Central AC and replace it with an 18 SEER heat pump and new coil, all the while leaving my old furnace in place as a back up. Dave and his guys did a great job on all three projects, completing each one in a day. Highly recommended."

Response time7 hrs

Response rate100%

7 neighbors recently requested a quote

Central A/C - Install

Serving Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1985

Free estimates

Credit card accepted

"Efficiency Air Inc is a fabulous company with excellent customer service and trained professional installers. I received a quote to install a mini split air conditioner/heat pump and we were overjoyed of the quality of work we received. They showed up on time and installed the system with ease. The install Manager â Deanâ was a true leader and got everything needed accomplished. I would recommend Dean and crew to anyone needing quality service. Thank you again for everything. Your lifetime customer Nathaniel G Santa Clarita, CA"

+50

Response time7 hrs

78 neighbors recently requested a quote

Recommended by95%of homeowners

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Air Duct Professionals

4.7(

1,518

)

Air Ducts & Vents - Clean

Serving Pasadena, CA and surrounding areas

Approved

In business since 1990

Free estimates

Warranties offered

"Sean was great about repairing my disconnected dryer air duct having to go into the crawl space and figure out what was going on. I'm glad he was able to get it done very quickly as well. He also had a very good attitude about doing the work."

+11

Response time1 day

2 neighbors recently requested a quote

Recommended by92%of homeowners

Central A/C - Service or Repair

Serving Pasadena, CA and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"On a very hot weekend in L. A., CA , I sent an email on a Monday morning around 1:00 AM. Mario from Mor Air called me at 7:00 AM and was able to be at my house by 8:30 AM . My problem was resolved to my satisfaction by 9:30 AM.. We also set up a schedule of regular inspections on my air condoning and heating systems. Mario is my new go to guy for air conditioning and heating issues. The next contact on the list called me at 10:30 AM to find out if I still needed air conditioning repair."

+13

Response time2 hrs

4 neighbors recently requested a quote

Recommended by98%of homeowners

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Around The Clock Heating & Air Conditioning, Inc.

4.5(

836

)

Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Pasadena, CA and surrounding areas

Approved

In business since 1967

Free estimates

Emergency services offered

"Our technician Oleg is very knowledgeable, punctual and a pleasure to work with. Our AC was not working during a brutal heat wave. We called Around the Clock and Oleg fixed our unit the same day... we have cool air now! A+ highly recommend. Thanks!"

+10

Response time1 day

30 neighbors recently requested a quote

Recommended by92%of homeowners

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All City Plumbing, Air & Electrical

4.9(

272

)

Central A/C - InstallCentral A/C - Service or Repair

Serving Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Emergency services offered

Warranties offered

"Troy and Max did an amazing job installing our water heater vent"

+42

9 neighbors recently requested a quote

Recommended by96%of homeowners

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Temp Air System, Inc.

4.8(

)

Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+1 more

Serving Pasadena, CA and surrounding areas

Approved

In business since 2002

Free estimates

Credit card accepted

"We had Temp Air install our AC unit. The best decision we ever made. They were fast, reliable and dependable. Excellent customer service, did a phenomenal job. After a couple of years something was going on with our unit, I called them and immediately they send out a technician Juan, who was phenomenal. He explained what the issue was and resolved it asap! Highly recommend this company!"

+14

Response time10 hrs

Response rate99%

10 neighbors recently requested a quote

Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+2 more

Serving Pasadena, CA and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"I highly recommend Belle Air Services! From the first moment I called to get a quote, to the moment they finished the job, I could not have asked for better customer service, top notch work, and competitive pricing. They communicated with me all throughout the process, made sure I understood everything that would be done, were on time, protected my home and were clean. They even worked very well with my HOA (who is very tough!). And to top it off, they didn't try to up-sell me as other HVAC contractors have in the past. So pleased that I have found this HVAC company!!"

Response time1 day

Response rate100%

3 neighbors recently requested a quote

Central A/C - InstallCentral A/C - Service or RepairAir Ducts & Vents - Clean+2 more

Serving Pasadena, CA and surrounding areas

Approved

In business since 1978

Free estimates

Emergency services offered

"They were very professional, on time, took the amount of time they said it would, and cleaned up afterwards. The ac is great"

83 neighbors recently requested a quote

Recommended by93%of homeowners

Request Quote

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Showing 1-10 of 735

Air Conditioning questions, answered by experts

Yes, it is possible. An electrical fire can break out if the compressor has inadequate ventilation. When it overheats but doesn't have a proper thermal cutout, this can cause the motor to short-circuit and catch fire. This risk is exacerbated if flammable materials, like dust and fallen leaves, are clogging the unit. The compressor overheating won't start a fire by itself, but poor maintenance and installation can increase the risk once it hits its breaking point and short-circuits.

High humidity, bad insulation, warmth from sunlight, and poor circulation are all reasons your home’s hotter inside than out. While this is what you want in the colder months, summer can become unbearable if this is a constant. Try to find the cause, but you need to remember that issues like this require a permanent fix (unless you want to bear down during the summer months).

You can buy a house with a 15-year-old HVAC system if you inspect the system for performance and budget for a replacement within the next three years. You can also negotiate the price with the sellers. Ask to look at the unit’s maintenance records and energy bills for the last two years to determine the shape of the HVAC system and its operating costs. Spend time in each room of the house to gauge if the HVAC keeps the home at a consistent temperature throughout.

If refrigerant levels are low, it can cause the evaporator coil to freeze up. Low freon causes a drop in pressure, which will make the coil too cold and cause moisture to freeze on the coil. Your system may be low on refrigerant because of a leak.

Make sure to have maintenance performed twice a year, and contact your local HVAC technician if you suspect your system has low freon levels.

If you’re looking for a portable, budget-friendly cooling solution that doesn’t require any venting or installation, a ventless AC system is a good option. Similarly, this is a great choice if you’re renting an apartment or home and aren’t allowed to make large, structural changes like installing comprehensive HVAC, or you’re in a shared space and only need to cool your own room.

The Pasadena, CA homeowners’ guide to air conditioning services

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

See all articles

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