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Find Air conditioning pros in Fullerton

Avatar for Cool Air Technologies Inc
Cool Air Technologies Inc
4.9(
493
)

Serving Fullerton, CA and surrounding areas

Approved

In business since 1996

Free estimates

Warranties offered

"The owner Bill McIntosh was very friendly and professional. His crew did an excellent job of installing the new heating and air conditioning system. They were very efficient and cleaned up everything after they were finished."
Additional Photos
Response time2 days
7 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Global Green Solutions
Global Green Solutions
5.0(
248
)

Serving Fullerton, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"My experience with heating and air conditioning repair, replacement, and new installation was excellent. Their staff was amiable, well-informed, and meticulous. Our device is operating more efficiently than before. Really trustworthy service!"
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+24

Response time3 days
11 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for MSP Heating and Air, LLC
MSP Heating and Air, LLC
4.9(
327
)

Serving Fullerton, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Emergency services offered

"This is the 4th of July weekend and our air conditioning went out!! We appreciated the quick response and the quality of the work performed by Danny. He was very thorough and quickly resolved the problem. He was very courteous and professional."
duct job all R-8 ducting
4 Ton GOODMAN Furnace
customer Vlastos
duct job all R-8 ducting
furnace install

+67

Response time4 hrs
10 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Ionel Firuta
Ionel Firuta
5.0(
30
)

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
)

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 Trinity Heating and AC
Trinity Heating and AC
5.0(
10
)

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 FIRST CLASS COMFORT HVAC LLC
FIRST CLASS COMFORT HVAC LLC
5.0(
19
)

Serving Fullerton, CA and surrounding areas

Approved

In business since 2025

Emergency services offered

Warranties 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

+28

Response time5 hrs
Response rate100%
21 neighbors recently requested a quote
Avatar for The Right Choice Heating & Air
The Right Choice Heating & Air
4.3(
169
)

Serving Fullerton, CA and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"This was absolutely the best service I could have imagined. My vents went from filthy to spotlessly clean. I feel as if I can breath again. The value for the services provides was excellent. The technician, Elie, was fantastic. He was so service oriented and treated my wife and I like his own family. He worked with us on pricing so it was affordable and he gave us a ten year "club membership" for only $999.00 which gives us ten years of maintenance, twice a year for the next ten years to keep our heating and cooling systems updated and clean. I strongly recommend The Right Choice Heating and Air. They are fantastic. Thank you, Elie, for everything and keeping my family healthy! You're the bomb!"
AC Pro Heat Pump Installation
Additional Photos
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+56

Response time11 hrs
Response rate100%
22 neighbors recently requested a quote
Avatar for Temp Air System, Inc.
Temp Air System, Inc.
4.8(
54
)

Serving Fullerton, CA and surrounding areas

Approved

In business since 2002

Free estimates

Credit card accepted

"Temp Air personnel are responsible, honest, knowledgable, and their customer service is top of the line. They were accommodating with a scheduled that worked for us. Also, the techs that came to our house were professionals and answered all of our questions. I highly recommend them."
Mini Split Installation
Mini Split Installation
Mini Split Installation
Mini Split Installation
Mini Split Installation

+14

Response time10 hrs
Response rate99%
4 neighbors recently requested a quote
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FAQs for air conditioning projects in Fullerton, 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 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.