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Find Air conditioning pros in Pasadena

Avatar for Global Green Solutions
Global Green Solutions
5.0(
248
)

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!"
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+24

10 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for Air-Tech Air Conditioning & Heating Inc
Air-Tech Air Conditioning & Heating Inc
4.5(
202
)

Serving Pasadena, CA and surrounding areas

Approved

In business since 1988

Free estimates

Warranties offered

"My interaction with Air-Tech went very smoothy. Alex Fish, the customer representative was very professional and easy to work with. He provided a clear and detailed proposal , with options, before leaving the site on his first visit. Alex stayed in communication throughout the project. As a result of this experience I plan to have Air-Tech take over the maintenance on my main HVAC system."
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+8

44 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for AC Dave Heating & Air
AC Dave Heating & Air
4.9(
93
)

Serving Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"I called and they sent someone out the next day. They were prompt and efficient and most of all the swamp cooler was repaired. The price they charged was excellent. I also signed up for a maintenance contract based on how well they took care of this problem. There are not a lot of places left who service swamp coolers so this was a good find. I have already recommended them to my sister for service on the air conditioning system in her home."
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+6

6 neighbors recently requested a quote
Recommended by96%of homeowners
Efficiency Air, Inc.
4.8(
320
)

Serving Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1985

Free estimates

Credit card accepted

"This was the second time Tim has done work for me. He installed the heating system two years ago and now the central air conditioning. His crew was very fast, clean and pleasant. I could not ask for better service.. My son, who is in the business out of state, said the price was very good."
A/C Condensers
A/C Condensers
A/C Condensers
A/C Condensers
Canoga Park, Goodman A/C

+50

168 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Mor Air, Inc.
Mor Air, Inc.
4.9(
83
)

Serving Pasadena, CA and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"was a pleasure working with Mor Air inc.. very quick to respond to my initial request, was able to schedule appointment within 1 day, Mario was knowledgeable, was able to quickly diagnose and address issue with AC unit , was fair and reasonable with pricing for services provided.. thank you .. Dave M"
Lost Condensers
Freon top off for a business
Gas furnace inducer motor replacement
Maintenance Service
Unit Install

+13

Response time50 mins
Recommended by98%of homeowners
Avatar for Around The Clock Heating & Air Conditioning, Inc.
Around The Clock Heating & Air Conditioning, Inc.
4.5(
836
)

Serving Pasadena, CA and surrounding areas

Approved

In business since 1967

Free estimates

Emergency services offered

"Arrived on time and fixed the problem. A bit more expensive than I would have liked but checking around probably not much more than elsewhere and our air conditioner was fixed same day in the middle of a heat wave."
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+10

45 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Belle Air Services
Belle Air Services
4.7(
70
)

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!!"
VRV - Multizone Comfort
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+9

9 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for All City Plumbing, Air & Electrical
All City Plumbing, Air & Electrical
4.9(
270
)

Serving Pasadena, 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

14 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Temp Air System, Inc.
Temp Air System, Inc.
4.8(
54
)

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!"
Mini Split Installation
Mini Split Installation
Mini Split Installation
Mini Split Installation
Mini Split Installation

+14

Response time10 hrs
Response rate99%
7 neighbors recently requested a quote
Avatar for Help-Me HVAC LLC
Help-Me HVAC LLC
4.9(
17
)

Serving Pasadena, CA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Sayed Haroon was very happy professional and helpful and very informative, I would recommend him for any service and next time if there?s a problem with any of my air conditioning system I?m definitely gonna be dealing with him"
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FAQs for air conditioning projects in Pasadena, CA

Most professional HVAC technicians require two to three hours to complete an expansion valve replacement. The timeframe depends on your unit's accessibility and whether additional repairs are needed. The process involves recovering refrigerant, removing the old valve, installing the new component, and recharging the system. Scheduling during less busy seasons may result in more convenient appointment times.

Operating your air conditioner with a malfunctioning expansion valve isn't advisable. Continuing to run the system could potentially damage other components, particularly your compressor, which is significantly more expensive to replace. If you notice performance issues like inconsistent cooling or unusual noises, it's best to have your system inspected before continuing regular use.

Expansion valves don't have a standard replacement schedule, as their longevity depends on system usage, maintenance frequency, and environmental factors. Regular professional maintenance helps identify potential valve issues before they cause system failure. Having your HVAC system serviced annually allows technicians to monitor component condition and recommend preventative replacements when necessary.

Refrigerant leaks require prompt professional attention. If your expansion valve is leaking, you'll likely notice reduced cooling performance and possibly hear hissing sounds near the unit. Addressing leaks quickly prevents further system inefficiency and avoids the environmental impact of released refrigerant. Your HVAC technician will need to repair the leak and recharge the system with the proper refrigerant type and amount.

Because many AC issues present similar symptoms, professional diagnosis is recommended. Problems like inadequate cooling, inconsistent temperatures, or strange noises could indicate expansion valve issues, but might also stem from refrigerant leaks, electrical problems, or airflow restrictions. A qualified HVAC technician has the tools and expertise to accurately identify the root cause and recommend appropriate repairs.

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.