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Top-Rated Air conditioning pros in Modesto - Updated Nov 2026

Avatar for Guerrero's Heating & Air Conditioning
Guerrero's Heating & Air Conditioning
4.7(
61
)
Central A/C - Service or RepairCentral A/C - Service or Repair - For Business

Serving Modesto, CA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"I was fortunate to receive service on the same day I called. My issue was difficult to diagnose, as many have tried before. They were willing to step in and try to resolve my issue for good. They were successful at their first attempt. I am grateful to Guerrero Heating & Air this Labor Day weekend of 100*F+ weather."
Response time3 hrs
Response rate87%
2 neighbors recently requested a quote
Avatar for Calor Air HVAC
Calor Air HVAC
5.0(
21
)
Central A/C - Service or RepairCentral A/C - InstallCentral A/C - Install - For Business+9 more

Serving Modesto, CA and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Costa takes pride in his work and did an excellent job of installing my microwave. He is very good at recognizing an issue and being able to improvise. I would strong recommend Costa for any handyman job around a home. I will definitely hire Costa again."
AC PM Service
HVAC PM Service
HVAC PM Service
AC Gauges
Before and after

+15

Response time7 hrs
5 neighbors recently requested a quote
Recommended by73%of homeowners
Avatar for Climate Care, Inc
Climate Care, Inc
4.8(
12
)
Central A/C - Install

Serving Modesto, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Credit card accepted

"I have been shopping around for a new air conditioning for sometime and honestly i just ended more confused with all this different sales mans trying to get us to buy. Until i called Climate Care. Oscar came over and explained everything so well and simple that he mades us feel very knowledgeable after everything was done. He gave us a red carpet treatment, the installers were amazing, very respectful of our home, fast, efficient hard working and super nice! Huge shoutout to this company!!"
My jobs.
My jobs.
My jobs.
My jobs.
My jobs.

+14

Response time7 hrs
Response rate100%
32 neighbors recently requested a quote
Avatar for AJAX Heating & Air Conditioning
AJAX Heating & Air Conditioning
5.0(
11
)
Central A/C - InstallCentral A/C - Service or Repair

Serving Modesto, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"He came out immediately and fixed my air conditioner even though it was late. He was professional, courteous, and really nice. His pricing was fair. I would highly recommend his services! My family is so grateful that we didn’t have to suffer the heat throughout the night!"
Gas/Pack W/ Ductwork
Gas/Pack W/ Ductwork
Down Flow Furnace
Down Flow Furnace
Upflow Furnace

+2

15 neighbors recently requested a quote
Avatar for Cosmic Comfort
Cosmic Comfort
4.8(
97
)
Central A/C - InstallCentral A/C - Service or Repair

Serving Modesto, CA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

Cosmic Comfort is a locally owned HVAC, electrical and solar company serving the Central Valley since 2015, from Modesto and Turlock to Merced, Atwater and Fresno. Our licensed team (CA C-10 and C-20, #1015082) handles AC and furnace repair and replacement, heat pumps, panel upgrades, rewires, EV chargers and solar with batteries. We're Tesla Certified for chargers and Powerwall. You get upfront pricing before any work starts, free estimates, flexible financing options and same-day service most weekdays. Every repair comes with a 1-year labor warranty, and every install with a 2-year labor warranty. You can reach us 24/7 to schedule. Join Cosmic Care for year-round maintenance and priority service.

Rooftop crane lift
Subpanel wiring
Team with van
Condenser and van
Rooftop wiring

+8

26 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Central Valley Air Conditioning
Central Valley Air Conditioning
4.8(
16
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+3 more

Serving Modesto, CA and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

"I have used Central Valley Air Conditioning (CVAC) for the past 5 years. They have maintained and kept my original Trane A/C and furnace equipment running like new. Recently, CVAC installed a whole house fan which was a game changer in dealing with the summer heat! Professional, timely, honest and easy to deal with. CVAC is a reliable company and I will definitely use them again!"
Residential Changeout
New Unit
 Mini Split Install
 Mini Split Install
AC Tune up

+6

10 neighbors recently requested a quote
Avatar for Loves Air
Loves Air
4.9(
7
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Modesto, CA and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

History Establish 2009.\nLoves Air has become the premier Heating, Air Condition company in the Central Valley. With the hard work and dedication from our team of expert HVAC technicians, our professional customer service team, our amazing managers and our visionary leadership from our owners, we have climbed to the top where we can proudly say we're the #1 HVAC company in Central California. Our attention to detail and commitment to our values have helped us grow. We Loves servicing customers every day and continuing to grow into the industry standard for all things HVAC. Welcome to Loves Air! Heating, Air Conditioning, Solar, Windows & Water Heater Installation, A/C Repair, Air Duct Installation, Air Duct Repair, Ductless A/C Services, Electric Furnace Installation, Electric Furnace Repair, Flame Sensor Repair, Gas Furnace Installation, Gas Furnace Repair, Heater Installation, Heater Repair.

WATER HEATERS
WATER HEATERS
WATER HEATERS
WATER HEATERS
WATER HEATERS

+36

Response time2 hrs
Response rate91%
2 neighbors recently requested a quote
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FAQs for air conditioning projects in Modesto, 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 Modesto, CA homeowners’ guide to air conditioning services

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