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Find Air conditioning pros in San Marcos

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

Serving San Marcos, 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
9 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Airmerica Air Conditioning & Heating
Airmerica Air Conditioning & Heating
5.0(
34
)

Serving San Marcos, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Emergency services offered

"Very professional. Really well priced. The owner Ryan does all the work himself with his team. He double, triple, and keeps checking that the air conditioning system is up and running perfectly. He doesn't overcharge. He takes his time until the job is completed to satisfaction. I would highly recommend his services."
Ultra Lo NOx 80% furnace and coil with Air-Wave air cleaner and 2" media filter
Outdoor unit feeding (5) indoor wall mounts
Heating & A/C Project
Single stage 14.3seer2 AC condenser
Outdoor unit feeding (5) indoor wall mounts with electrical ran by us from panel.

+6

27 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for AireCare Heating and Air
AireCare Heating and Air
5.0(
39
)

Serving San Marcos, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Emergency services offered

"Michael was knowledgeable and very informative. The installers were competent, outstanding, and courteous. Aire Care’s bid was more budget friendly compared to other major local companies. The crew promised to get installation done in 2.5 days but completed the work in 2 days with an additional install. All in all, we would go with AireCare Heating and Air any day. We highly recommend AireCare Heating and Air."
San Marcos Full System
San Marcos Full System
San Marcos Full System
San Marcos Full System
San Marcos Full System

+8

Response time5 hrs
48 neighbors recently requested a quote
Recommended by23%of homeowners
Avatar for Liberty Plumbing Heating Air Conditioning Inc
Liberty Plumbing Heating Air Conditioning Inc
4.9(
209
)

Serving San Marcos, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Two technicians came, Jeremy and Ryan. They were great. They checked the thermostat, the electrical board that looks like the motherboard to a computer, some plastic pipes and the air filter. My bad. I went miles too long without replacing the air filter. Their explanation helped a lot. It reminded me of people and how if they take care of themselves, their internal organs don't strain as much to keep the body going. That's what happened to my a/c. I didn't take good care of the filter, so it had to strain a lot harder to keep going. They said I should replace my air filter every 3-6 months. I am so grateful that they came out so quickly because it gets very hot in my condo on the second floor. Again, great service, excellent attitude, prompt and outrageously good prices. I shudder to think of the companies that would claim all kinds of stuff "under the hood" and overcharge. I consider myself very lucky.
"
20 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Sky Clean Air
Sky Clean Air
4.7(
21
)

Serving San Marcos, CA and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

"I was really impressed with the service provided by Nadav and he is team. I have a thirty year old home that still had the original HVAC systems. One located in the attic and the other underneath the house. Neither of these installations was simple. The Sky Clean Air team quoted me two days to remove and install new systems. The install crew was really professional, courteous and hard working. The underneath the house install was especially difficult with a tight crawl space in a less than hospital environment. These guys were not a show up at 10 leave at 3 pm crew.......they worked long hours both days to ensure they met the promised schedule.They kept me informed any issues throughout the installation process so there were no surprises. At the end of two days we had two beautifully installed systems that now cool our 4000 sq ft house in a matter of an hour instead of the 4 or 5 the old system required. I feel that the pricing they gave me was very fair and at the end of the job I felt like I got more value than what I paid. I would certainly use them again in the future."
Air duct full of dust and debris.
Cleaned duct
Additional Photos
Additional Photos
Additional Photos

+24

15 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Airtime Plumbing Heating & Air
Airtime Plumbing Heating & Air
4.8(
28
)

Serving San Marcos, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2005

Free estimates

Emergency services offered

"⭐⭐⭐⭐⭐ Exceptional Service from Airtime Plumbing, Heating, & Air! I cannot recommend Airtime Plumbing, Heating, & Air highly enough! From the initial service call to the completion of the job, my experience was absolutely five-star. We had an urgent issue with our furnace acting up just as the cold weather hit, and they responded with incredible speed and professionalism. The technician David arrived promptly, was extremely courteous, and clearly explained what was wrong with our unit. He didn't just fix the problem; he took the time to show me what maintenance steps I could take to keep the system running efficiently. What Made Them Stand Out: Punctuality & Communication: They called ahead, arrived exactly when they said they would, and kept me informed throughout the process. Expert Knowledge: The diagnosis was fast and accurate. They fixed the problem right the first time. Fair Pricing: The final cost was competitive and exactly what was quoted, with no hidden fees or upselling. Cle"
tankless water heater
Chacon house
Chacon house
Chacon house
Additional Photos

+55

114 neighbors recently requested a quote
Recommended by65%of homeowners
Avatar for All Day Heating And Air Conditioning
All Day Heating And Air Conditioning
5.0(
16
)

Serving San Marcos, CA and surrounding areas

Approved

In business since 2010

Credit card accepted

Customers say: True professional

"Josh was able to help us out less than 24 hours after I called. We had no AC and it was very hot in our home. He called ahead of his scheduled visit and was able to arrive earlier. He was very efficient, knowledgeable and friendly. We discussed future work replacing equipment and will definitely contact Josh to do the job."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+14

Recommended by100%of homeowners
Avatar for Oasis Plumbing, Heating & Air Conditioning
Oasis Plumbing, Heating & Air Conditioning
5.0(
13
)

Serving San Marcos, CA and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

"My air conditioner stopped working last weekend. I called a couple of places and was not able to get anybody to come out in a reasonable time. I came across an oasis and they were very helpful and had a tech out later that afternoon. The tech was very knowledgeable and the Price was fair. They had our ac back up in running in no time. I hope I do not need any repairs again soon, but if I do Oasis will be my first call."
AC Condenser
New Home Furnace
AC Replacement
AC Installation
Furnace Installation

+6

Response time7 hrs
Response rate90%
8 neighbors recently requested a quote
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Showing 1-10 of 378

FAQs for air conditioning projects in San Marcos, 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 San Marcos, CA homeowners’ guide to air conditioning services

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