Santa Rosa's Top Automotive Air Conditioning Service

Tristar Automotive provides expert heating and AC repair to keep vehicles comfortable across Santa Rosa and Sonoma County.

Why Choose Tristar Automotive for Heating & AC Repair?

From refrigerant leaks to heater core replacements, our ASE-certified technicians handle all climate control issues. Since 1991, we’ve served Santa Rosa and the North Bay with reliable, transparent service. As a BBB A+ business licensed by the California Bureau of Automotive Repair (BAR), we ensure comfort and dependability in every season.

AC Recharge & Leak Detection

If your air conditioning system blows warm air, it may be due to low refrigerant or leaks. We perform leak tests, recharge refrigerant, and inspect compressors and condensers to restore cooling power. Drivers in Santa Rosa and Sonoma County rely on Tristar Automotive for fast, accurate AC repairs that beat the summer heat.

Heater Core & Blower Motor Repair

A malfunctioning heater can make winter driving unbearable. We replace heater cores, thermostats, and blower motors to restore warmth and defrost capability. By using OEM-quality parts, we ensure long-term performance for drivers in Santa Rosa, Rohnert Park, and the North Bay.

HVAC System Diagnostics

Modern vehicles use complex HVAC systems with sensors, actuators, and climate control modules. We run complete diagnostics to identify electrical or mechanical issues, ensuring your system performs properly year-round. Our reputation in Sonoma County is built on accurate solutions and dependable service.

Cooling Fan
Condenser
Receiver/Dryer
Expansion Valve
Evaporator
Blower Fan
Compressor
Supply & Return Lines

Call your friendly ASE Certified mechanics at Tristar Automotive 707-571-8866

More Auto Repair Services

Be sure to read more about how our Factory Scheduled Maintenance services can save you money. And, be sure to view our complete line-up of Automotive Repair and Services available at Tristar Automotive in Santa Rosa, CA!

Why Drivers Trust Us for Heating & AC Repair

With ASE-certified expertise, BBB A+ recognition, and BAR licensing, Tristar Automotive is a trusted source for heating and cooling repair throughout Santa Rosa and Sonoma County.

Harold Duncan

29 August 2026

Very efficient and professional work…Staff is very kind and friendly as well…l had a Smog check…

James Fitzgerald

22 August 2026

Great service and communication, thank you Team TriStar! Reliable and always stand behind their work and dedication, delivered with kindness and customer satisfaction!

julie berman

19 August 2026

Left the dealership where I purchased my car and became a new customer of TriStar. They could not have been nicer, and their fees were very reasonable. Color me very pleased with my overall experience.

H P Mechanical

14 August 2026

We have used tri star for many years, for service for our service fleet. We have found them to be honest, fair, efficient and they always keep you in the loop of your repair.

Mark Jones

29 July 2026

There good and fast!

Stephen Riedel

28 July 2026

I have had a couple recent repairs here including the catalytic converter and brake booster on my ‘98 Tacoma. I’ve been impressed by how responsive, timely, knowledgeable and professional the shop owners are! Thank you for all the high quality work you guys have done! It is much appreciated even though the issues have been unanticipated. It’s been a pricey last six months for me with all the vehicle repairs, but I’m trying to keep it running well for at least another 100K miles. 👍🏻 I hope I don’t have to come in anytime soon… 🙂

MaryLou Herrera

26 July 2026

I received good service. I felt comfortable and confident with the service I received.

Diane Castro

15 July 2026

My first experience was great! Ken was professional and fast. I needed a new catalytic converter in my 2014 Kia so it could pass the smog test - Ken was communicative and friendly. I love that they have a company Uber account so I could be taken home after I dropped my car off.

Chip Smith

11 July 2026

Ken & Zac got me in quickly, diagnosed my issues, and got me back on the road tootsweet - pardon my french. (They even laughed at my corny jokes! Thanks, guys...😇) My problem turned out to be much less serious than I thought, and they were in contact with me the through the entire process. AND they got me a rideshare to and from! If you want a shop with friendly, reliable folks, you won't go wrong with TriStar!

William Keim

9 July 2026

TriStar Automotive began with an oil change. Most recently I received more service to my car. It needed the attention and TriStar Automotive provided exceptional service. I would highly recommend TriStar to anyone looking for quality, honesty, and integrity.

Theresa M.

6 July 2026

I needed to have my Exotic car's DMV exhaust certification renewed. The car is an 1988. I have quite a bit of angst when every two years the certification has to be renewed. I took the car to TRISTAR. They were WONDERFUL!! They felt my concern. The car passed with flying colors, twice at this time! The people who own/work at Tristar are master mechanics! They were kind enough to give me a referral for an excellent Exotic car repair shop. Since moving to Sonoma County eight years ago I have been in convulsions on where to take my car for engine repairs. Tristar's recommendation was another star on their rating. They should receive 10 stars!!!

Kathleen Austin

3 July 2026

Excellent service !!! As always, For years and years to come... Thank you 😊

Mollie Bruno

2 July 2026

Fast and friendly service. Very happy and have smog cert for DMV 🙂

Richard Deacon

23 June 2026

Staff and mechanics were all great and first class Nothing was a problem and so helpful Would highly recommended Tristan at anyone Thanks again for your help⭐️⭐️⭐️⭐️⭐️

Andrew 15

22 June 2026

I was searching for mobile mechanics to help me inspect a vehicle that I was purchasing out of state. The quotes were high, and the reviews were mixed, And I really wanted to get the vehicle up on a lift. The shop was right down from the dealership, and the dealership offered to drive it for the inspection. Boy did everything work out great. Tristar was very easy to work with. They were fair priced, and even stuck with a miss quote That was advantageous to me. The vehicle got dropped off late, and they were still able to accommodate once the inspection was done, we got on the phone and talked about the vehicle. Everything went as we had hoped. I wish this shop was in state for me. Highly recommend them

greg

21 June 2026

tristar did troubleshooting of my hard shifting transmission and faulty temp gauge. they fixed both problems. charges were fair and communication was great with ken, the service manager. definitely recommend this shop for their professionalism and knowledge. this is the shop my local mechanic recommends when he runs into a problem that he can't fix!

Trusted Heating & AC Service in Santa Rosa & Sonoma County

Since 1991, Tristar Automotive has kept vehicles comfortable with proven automotive HVAC repair and certified care.

For Automotive Heating & AC Service in Santa Rosa & the North Bay

Call (707) 571-8866

From AC recharges to system overhauls. Choose Tristar Automotive.

Automobile Air Conditioning Systems are comprised of many components, such as hoses, which transport the refrigerant throughout the air conditioning system, and seals which maintain the closed system. Unless periodiclly inspected and maintained on a routine basis, A/C system hoses and seals can become brittle, developing cracks and allowing the refrigerant/lubricant to escape – leading to efficiency loss (eg. air is not as cold as it used to be, component failure, increased noise, odors, etc.).

Advantages of a functioning AC system

Improved Air Quality Warm air passing over the evaporator coils produces condensation or moisture, which tends to collect dust & other particulates – removing them from the air you breathe.
Safer Driving During hot weather, a properly functioning A/C System will do its job by cooling the air inside your vehicle’s interior. Studies indicate a comfortable driver is less likely to be involved in an accident. During cooler weather, the A/C system can come into play again, by assisting in the defrost process of your vehicle’s windows. Cool air contains less moisture; therefore, windows can be defrosted quicker by using the air conditioning system.
Fuel Economy A car will tend to obtain better fuel economy ratings as its shape becomes more aerodynamic. Vehicles having more aerodynamic shapes tend to travel along with less resistance and thereby consume less power or fuel necessary as they are being “pushed” through the atmosphere around us. One way you can ensure your vehicle is at its optimum aerodynamic state, is simply by keeping the windows rolled-up. A properly functioning Air Conditioning System allows us to do this during hot weather by maintaining a cool and comfortable environment inside your vehicle.
Increased Resale Value “Does the A/C work?” Is a question you will likely hear when selling your automobile to a private party.

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Our Customer Reviews

These are just a few reviews from our valued car service & repair customers throughout Sonoma County.