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Find Air conditioning pros in Sunnyvale

Avatar for Metro Air Conditioning Heating & Services
Metro Air Conditioning Heating & Services
4.5(
66
)

Serving Sunnyvale, TX and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"We scheduled a 4 pm appointment. By 4:45, no one showed up or called to confirm their whereabouts. I had to call Metro Air and ask what was going on. The secretary said she will dispatch a technician to my house. The technician did not arrive until 5:30. He was kind and was able to fix the capacitor, which was causing the issue. About a week later, their office followed up. I told the lady that the a/c was on, but now there was another sound coming from the system. The secretary indicated that the technician would call me that day to discuss and set up a follow up visit to address the issue. No one ever called."
ducts extended from supply air plenum
Response time2 days
14 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Xtreme Air Services
Xtreme Air Services
4.3(
83
)

Serving Sunnyvale, TX and surrounding areas

Approved

In business since 2009

Free estimates

Credit card accepted

"Great service always! Techs are professional, knowledgeable and personable. Office staff is friendly and respectful. Overall, I know the people at Extreme Air actually care about providing me with the best service they can."
Rooftop Install
Residential HVAC Install
We service the entire DFW area, up to 90 miles out
Air Conditioning Install
Air Conditioning Maintenance

+7

Response time11 hrs
Response rate91%
19 neighbors recently requested a quote
Avatar for 4 Elements Air Conditioning, LLC
4 Elements Air Conditioning, LLC
4.8(
3
)

Serving Sunnyvale, TX and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"Ishmael was super responsive and his team did an excellent job replacing our 20+ year old ductwork and blew in insulation after. They laid down canvas on the floors to keep it clean and they carried off the trash when they were done."
Air Handler Change Out
Air Handler Change Out
Response time1 day
Recommended by100%of homeowners
Avatar for Young & Son HVAC-R, LLC
Young & Son HVAC-R, LLC
5.0(
22
)

Serving Sunnyvale, TX and surrounding areas

Approved

In business since 2025

Emergency services offered

Warranties offered

"I was just getting home from work and I happen to noticed that my house was really hot, the thermostat was reading 85 degrees while set for cool, the blower was working but my air conditioning system would not come on. I stepped outside and walked over to the system and heard a buzzing noise but nothing was working so I went on to my app and requested for an air conditioning company and Young and son stopped by the same day. Julius was able to diagnose the problem I was having with my AC system and explain the buzzing noise, within a short period of time my air conditioning system was working and providing my home with cold air. Thank you!!!!! So much young and son, I am going recommend your services to all of my friends and relatives."
No heat fix!
No heat fix!
No heat fix!
Ac repair
Ac repair

+25

Response time5 hrs
Response rate100%
1 neighbors recently requested a quote
Avatar for Mansfield Plumbing Company, Inc.
Mansfield Plumbing Company, Inc.
4.4(
106
)

Serving Sunnyvale, TX and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"Chris was great, very knowledgeable and nice. Turns out it was a super simple fix that didn't even require any parts or tools so he didn't charge us a dime. Another company wanted to do a full replacement totaling over $2500. Great guy, we'll definitely be calling them for any plumbing issues in the future."
Tankless Water Heater
Tankless Water Heater
Tankless Water Heater
HVAC system
Working Hard to Solve Your Service

+83

Response time5 hrs
Recommended by93%of homeowners
Avatar for Southern Air Mechanical
Southern Air Mechanical
5.0(
21
)

Serving Sunnyvale, TX and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"I have used Southern Air for several years on my personal home and for rental properties. I would not even consider using another provider. High integrity, honest and fair prices."
Additional Photos
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+1

Response time1 day
Recommended by100%of homeowners
Avatar for Mechanical Comfort Systems Inc
Mechanical Comfort Systems Inc
5.0(
6
)

Serving Sunnyvale, TX and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"The lady that answered the phone was very polite and scheduled the appointment to my convenience. The tech. Arrived 10 mins early and presented himself very professionally also his van looked very nice. Upon diagnosing the problem he explained all my options and gave me his recommendation as to what my next step should be. I decided to replace bad part and get the air conditioner tuned up. I'm was extremely satisfied with the level of service I received from mechanical comfort systems, and will use the company again for future repairs and maintenance.
"
Additional Photos
Additional Photos
Additional Photos
9 neighbors recently requested a quote
Recommended by100%of homeowners
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FAQs for air conditioning projects in Sunnyvale, TX

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 Sunnyvale, TX homeowners’ guide to air conditioning services

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