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

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+4 more

Serving Westchester, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Excellent heating and air conditioning repair, replacement, and new installation services! Everything went smoothly and without incident from beginning to end. Before departing, they made sure the system was operating flawlessly, responded quickly, and worked effectively. Excellent service?I heartily recommend them!"
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+24

Response time3 days
8 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for Belle Air Services
Belle Air Services
4.7(
70
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+6 more

Serving Westchester, 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

Response time1 day
Response rate100%
2 neighbors recently requested a quote
Avatar for Trinity Heating and AC
Trinity Heating and AC
5.0(
10
)
Central A/C - Service or RepairCentral Air Cleaner - Repair or Service

Serving Westchester, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"I highly recommend Trinity A/C & Heating. Our air conditioning system stopped working, so we called another company to diagnose the problem. After a brief inspection, including a trip to the attic, they told us we needed a completely new duct system at a cost of nearly $8,000. Fortunately, we decided to get a second opinion and called Trinity A/C & Heating. Jimmy thoroughly inspected the system and quickly identified the real issue: the system was simply low on refrigerant. They fixed the problem for a little over $300, and the A/C has been working perfectly ever since. Jimmy and Mike were honest, professional, knowledgeable, and took the time to explain everything clearly. Their integrity saved us thousands of dollars and prevented us from paying for unnecessary work. It's refreshing to find a company that puts honesty and customer service first. If you need A/C service, do yourself a favor and call Trinity A/C & Heating before making any major repair decisions. Thank you, Jimmy"
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

1 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Season Control Heating Air Conditioning, Inc.
Season Control Heating Air Conditioning, Inc.
4.7(
115
)
Central A/C - Service or Repair

Serving Westchester, CA and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"The company is top notch professional from the minute we met them. From the contract negotiations, delivery of materials and instillation, they were amazing. The installers gave us good advice about where we thought the unit might go to be placed in a more efficient noise cancelling area. I recommend this company to anyone who has air conditioning needs."
AC New Installation
AC New Installation
AC New Installation
AC New Installation
AC Repair

+14

Response time1 day
Response rate91%
167 neighbors recently requested a quote
Avatar for West Coast Chief Repair, Inc.
West Coast Chief Repair, Inc.
3.6(
1,830
)
Central A/C - Service or RepairCentral A/C - Service or Repair - For BusinessSwamp Cooler - Service or Repair - For Business+2 more

Serving Westchester, CA and surrounding areas

Approved

In business since 1996

Emergency services offered

Warranties offered

"The pilot on my wall heater would not stay lit. The technician whose name is Walter, arrived on time. He was courteous and professional. He diagnosed the problem quickly and did the repairs efficiently. He had the new parts I his vehicle and he tested the pilot several times to make sure it worked before leaving. I would use West Coast Repairs in the future."
All Major Appliance Repair
Sunset, West Hollywood
All Major Appliance Repair
All Major Appliance Repair
Response time4 hrs
Recommended by71%of homeowners
Avatar for RighTime Home Services Riverside
RighTime Home Services Riverside
4.0(
132
)
Central A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Westchester, CA and surrounding areas

Approved (Corporate)

In business since 1947

Free estimates

Credit card accepted

"This company installed a new AC unit appx 6 years ago. In the last two years when we had our AC go out, of course on the hottest days of the years, it was impossible to get same day service. While a same day appointment was provided, with a four-hour window for arrival time, the worst part is they never showed up, nor did they communicate and tell us they weren't coming. On the second day, we called and received another 4-hour window and they did show. Seems they've gone AI for their appointment setting, but lack on giving updates and communicating when they aren't going to make their appointment. On second day, a technician did show up, and he diagnosed & fixed the quickly."
RighTime Home Services
RighTime Home Services
RighTime Home Services
RighTime Home Services
RighTime Home Services

+2

328 neighbors recently requested a quote
Recommended by64%of homeowners
Avatar for Local Home Services Inc.
Local Home Services Inc.
4.9(
28
)
Window A/C Unit - InstallWindow A/C Unit - Install - For Business

Serving Westchester, CA and surrounding areas

Approved

In business since 2017

Free estimates

Warranties offered

We are problem solvers. With over twenty two years of experience there isn't much we haven't seen. From the smallest task to the largest we will perform our job with professionalism and in a timely manner. We guarantee our work 100%. .

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+27

Response time1 day
Recommended by92%of homeowners
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FAQs for air conditioning projects in Westchester, 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 Westchester, CA homeowners’ guide to air conditioning services

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