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5 Best AC Repair Services in San Marcos, CA

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Written By Max Peterson|Last Updated: May 18, 2024

In warm weather, a summer air conditioner (AC) breakdown can be worst-case scenario. If you find yourself in need of AC repair in San Marcos, don't worry - we have you covered with who to call next. Discover San Marcos' top HVAC repair and replacement companies, and read further about what your home might need.

Top AC Repair Companies in San Marcos, CA

Action Air Conditioning & Heating Logo

Action Air Conditioning & Heating

Based on 2,650 customer reviews.

Services Offered

Furnace InstallationMaintenanceAc RepairDuctlessFurnace RepairEmergency ServicesAc InstallationDuct CleaningIndoor Air Quality


  • Informative resources
  • Reliable customer support
  • Free quote
130 Bosstick Blvd, San Marcos, CA 760-309-5790 actionac.net
John Stevenson Plumbing, Heating & Air Conditioning, Inc. Logo

John Stevenson Plumbing, Heating & Air Conditioning

Based on 2,384 customer reviews.

Services Offered

FiltrationInspectionFurnace InstallationMaintenanceDuctlessAc InstallationEmergency ServicesAc RepairIndoor Air Quality


  • Prompt service delivery
  • Free quote
  • Informative resources
2748 Loker Ave W, Carlsbad, CA 760-276-6690 johnstevensonplumbing.com
Cool Air Solutions Heating and Air Conditioning Inc. Logo

Cool Air Solutions Heating and Air Conditioning

Based on 290 customer reviews.

Services Offered

Furnace InstallationMaintenanceEmergency ServicesIndoor Air QualityAc RepairAc InstallationBoiler InstallationVentilationFiltration


  • Free quote
  • Clear pricing policy
  • Informative resources
450 S Melrose Dr Box 53, Vista, CA 760-205-3756 coolairsolutions.com
Five Star Service Company Logo

Five Star Service Company

Based on 234 customer reviews.

Services Offered

Ac InstallationIndoor Air QualityAc RepairFurnace InstallationMaintenance


  • Reliable customer support
  • Clear pricing policy
  • Free quote
1948 Don Lee Pl #1, Escondido, CA 619-977-8261 fivestarsvc.com

More Local Hvac Companies

Alanis Air

User Reviews: 4.7/5 

1937 Julie Dawn Pl
Escondido, CA 92026

Free Air Mechanical Inc.

User Reviews: 4.7/5 

1157 W Mission Ave
Escondido, CA 92025

My Guy Heating & Air

User Reviews: 4.6/5 

934 S Andreasen Dr Suite H
Escondido, CA 92029

Airmerica Air Conditioning & Heating Inc.

User Reviews: 4.6/5 

750 Breeze Hill Rd
Vista, CA 92081

Major League Comfort Systems

User Reviews: 4.6/5 

4055 Oceanside Blvd space u
Oceanside, CA 92056

Reliable Standard Heating & Air

User Reviews: 4.6/5 

11315 Rancho Bernardo Rd #138
San Diego, CA 92127

Champion Air Conditioning & Heating

User Reviews: 4.5/5 

120 N Pacific St STE A9
San Marcos, CA 92069

Jims Heating and Air Conditioning

User Reviews: 4.2/5 

10112 Vista Montanoso
Escondido, CA 92026


User Reviews: 4.5/5 

13543 Zinnia Hills Pl
San Diego, CA 92130

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

AC units after being repaired by a local pro

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Facts about San Marcos
Average Max Temp Percentile:87.4%
August Average Max Temp:86.5°F
Climate Zone:Hot-Dry
Average Energy Cost:$0.26/kWh
Median Year Houses Built:1987
Average Heat Waves per Year:2.77

Expert Tips By

This Old House empowers homeowners with the knowledge and tools they need to tackle various projects and navigate the complexities of homeownership.

Common Types of Air Conditioners

There are a few different types of HVAC models on the San Marcos market. While HVAC professionals can work with most types, knowing which one you have will simplify your company hunt.

  • Ductless mini-split: Ductless mini-split air conditioner systems have an exterior unit and multiple interior units, with no ductwork required. They offer flexible installation options, individual room temperature control, and higher energy efficiency.
  • Split ACs: Split ACs have two main elements: one indoors and one outdoors. They offer silent operation, greater energy efficiency, ductwork options, and more cooling capability versus mini-splits.
  • Central AC: These are the most common home air conditioners, offering precise, consistent temperature control. They feature a central unit that cools and purifies outside air and sends it through ducts to various rooms in your home.
  • Portable air conditioners: As the name implies, portable air conditioners don't require permanent installation or ductwork. Instead, they remove hot air through an exhaust hose connected to a window or nearby vent. They're a common choice for apartments, condos, or individual rooms.
  • Window ACs: Window air conditioners are a popular choice for San Marcos condos, apartments, and townhomes. These budget-friendly, convenient units are designed for cooling small spaces and single rooms, and they fit snugly in a window frame or dedicated wall slot. Many window AC users deploy their units without professional assistance, though technicians can still help with maintenance and repairs.

How to Choose Your San Marcos AC Repair Service

While you might want to resolve your AC issue quickly, you should carefully investigate what's out there before signing a contract with a repair service. Take the following steps to ensure you find the top-rated company for your home.

Confirm the Company Is Properly Licensed and Insured

California HVAC contractors need a C-20 (Warm-Air Heating, Ventilation, and Air-Conditioning) license from the Department of Consumer Affairs. The application process involves comprehensive exams on business law and practical skills.

Many states and cities also require companies to carry liability insurance. Even if your community doesn't require it, we still recommend choosing an insured company. This will protect you if an accident happens or something gets damaged.

Read Customer Reviews

Read customer reviews on the Better Business Bureau (BBB) website for each company you're interested in. The BBB recognizes businesses that handle complaints effectively and honor their warranties.

It's common for even the best AC repair providers to have both positive and negative reviews. Read each one carefully, and avoid a company if most reviewers had subpar experiences.

Compare Estimates

Obtain at least three detailed, written estimates from different providers for the best price. A good estimate should factor in additional fees such as permitting costs. You should also ask about manufacturer warranties, the emergency repair process, and installer guarantees.

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Frequently Asked Questions About AC Repair in San Marcos

What's the cost of an AC repair job in San Marcos?

Your AC unit repair costs will hinge on the type of unit you have and the malfunctioning part. A basic repair job like sorting out a thermostat might cost $150–$250, whereas a more intricate fix like switching out the compressor will be more expensive.

See the average costs for common AC repairs below.

Common RepairAverage Cost
Clogged air filter$64–$171
Electrical circuits$200–$250
Drainage problems$100–$150
Refrigerant leak$400–$1500
Frozen condenser coils$1,285–$3,855
Fan or air blower issues$150–$200
Compressor replacement$600–$1,628

Does my air conditioner need routine maintenance? If so, how often?

Homeowners should have their AC systems serviced a minimum of once a year to ensure optimal performance. This usually involves cleaning the outdoor unit of brush and debris. Regular servicing can help to maintain the system's efficiency and prolong its lifespan.

Why is my AC running but not cooling?

If your AC is running but not cooling, a blocked condenser coil could be the culprit. Normally, the AC’s condenser fan pulls air into the outdoor unit through the condenser coil to remove heat energy from your home. A technician can help by clearing the clog or replacing a defective coil.

Why should I hire an HVAC professional? Couldn't I repair my air conditioner myself?

You can most likely position a window AC unit on your own. However, installing other air conditioners should almost always be done by an HVAC contractor who knows the intricate piping, tubing and wiring. We also advise getting professional installation due to the risk of refrigerant spills.

Should my HVAC company have a private accreditation?

Private accreditations aren't always necessary, but companies that seek them are typically more trustworthy. The two largest HVAC trade bodies that issue certifications are the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) and Air Conditioning Contractors of America (ACCA).

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.