Top-rated thermostat installers and replacers.

Get matched with top thermostat installers and replacers in Los Angeles, CA

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Thermostat installers and replacers in Los Angeles

Avatar for Just Be Cool Supply, LLC

Just Be Cool Supply, LLC

4.97(
29
)
Approved Pro

Just Be Cool Supply, LLC

4.97(
29
)
Approved Pro
Super Service Award
Customers say: Quick response
20 local quotes requested
3 years of experience

is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"evryhting went as agreed. thank you."

TY T on November 2025

is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"evryhting went as agreed. thank you."

TY T on November 2025


Avatar for QNZ Mechanical

QNZ Mechanical

5.00(
5
)
Approved Pro

QNZ Mechanical

5.00(
5
)
Approved Pro
25 years of experience
Free onsite estimate

At QNZ Mechanical, we provide expert heating, cooling, and electrical solutions for both residential and commercial clients. We understand that comfort, safety, and efficiency are essential which is why our team is dedicated to delivering reliable, high-quality service for every project. From central AC and mini-split installations to advanced zoning systems, air purification, and emergency repairs, we handle it all. We also offer routine maintenance and flexible financing options, ensuring your systems run smoothly year round. With QNZ Mechanical, you can trust our experience, professionalism, and commitment to keeping your home or business comfortable and safe.

"Mike was very knowledgeable and his team was fast. I had my entire ac system replaced the following day with no issues. If you need an AC guy Mike with Qnz is the guy to call."

roberto c on November 2025

At QNZ Mechanical, we provide expert heating, cooling, and electrical solutions for both residential and commercial clients. We understand that comfort, safety, and efficiency are essential which is why our team is dedicated to delivering reliable, high-quality service for every project. From central AC and mini-split installations to advanced zoning systems, air purification, and emergency repairs, we handle it all. We also offer routine maintenance and flexible financing options, ensuring your systems run smoothly year round. With QNZ Mechanical, you can trust our experience, professionalism, and commitment to keeping your home or business comfortable and safe.

"Mike was very knowledgeable and his team was fast. I had my entire ac system replaced the following day with no issues. If you need an AC guy Mike with Qnz is the guy to call."

roberto c on November 2025


Avatar for Tropical Heating & Air, Inc.

Tropical Heating & Air, Inc.

4.92(
59
)
Approved Pro

Tropical Heating & Air, Inc.

4.92(
59
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
47 local quotes requested

Tropical Heating & Air, Inc. is a locally owned and operated company proudly serving Santa Ana and the surrounding community. With years of hands-on experience in plumbing, heating, and cooling, we handle everything from new system installations to repairs and maintenance plans. Our mission has always been simple: deliver top-quality service and reliable products at a fair price. Customers count on us to be prompt, professional, and thorough—and we don’t leave until you’re 100% satisfied.

"The repairman was on time and got to work immediately. He knew what he was doing and in a fairly short time he had my swamp cooler working like new. Very professional. I recommend Tropical Heating and Repair to anyone with air condition or swamp cooler problems. "

Judy C on October 2025

Tropical Heating & Air, Inc. is a locally owned and operated company proudly serving Santa Ana and the surrounding community. With years of hands-on experience in plumbing, heating, and cooling, we handle everything from new system installations to repairs and maintenance plans. Our mission has always been simple: deliver top-quality service and reliable products at a fair price. Customers count on us to be prompt, professional, and thorough—and we don’t leave until you’re 100% satisfied.

"The repairman was on time and got to work immediately. He knew what he was doing and in a fairly short time he had my swamp cooler working like new. Very professional. I recommend Tropical Heating and Repair to anyone with air condition or swamp cooler problems. "

Judy C on October 2025


Avatar for Progressive Air, Inc.

Progressive Air, Inc.

5.00(
7
)
Approved Pro

Progressive Air, Inc.

5.00(
7
)
Approved Pro
15 years of experience
Emergency services offered

At Progressive Air Inc we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"I called this company for my AC and from phone call to solving my ac problem was excellent. Greg spoke with me on phone and what he told me by phone he kept every word and did his job 100%. Thanks Greg jan I advise everyone to use your service."

Gor S on November 2025

At Progressive Air Inc we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"I called this company for my AC and from phone call to solving my ac problem was excellent. Greg spoke with me on phone and what he told me by phone he kept every word and did his job 100%. Thanks Greg jan I advise everyone to use your service."

Gor S on November 2025


Avatar for Juan's Handyman

Juan's Handyman

5.00(
9
)
Approved Pro

Juan's Handyman

5.00(
9
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
172 local quotes requested

My mission is to be a provider that brings back the personal touch with our customers. I will build a relationship that will last a lifetime after you see my quality work. As a locally owned and operated business I feel invested in our clients and constantly strive for customer satisfaction. Call or message me to schedule an estimate today!

"Small family run business with the most integrity I have ever come across. Professional, communicative, friendly, on time, trust worthy. They were respectful of my time, my property and budget. There were a couple of hiccups but those were taken care of swiftly with no issues. The project was not done until I was 100% happy with the outcome. Trust and integrity go a long way with me. I wouldn't hesitate using them for any kind of project in the future."

Brian N on September 2025

My mission is to be a provider that brings back the personal touch with our customers. I will build a relationship that will last a lifetime after you see my quality work. As a locally owned and operated business I feel invested in our clients and constantly strive for customer satisfaction. Call or message me to schedule an estimate today!

"Small family run business with the most integrity I have ever come across. Professional, communicative, friendly, on time, trust worthy. They were respectful of my time, my property and budget. There were a couple of hiccups but those were taken care of swiftly with no issues. The project was not done until I was 100% happy with the outcome. Trust and integrity go a long way with me. I wouldn't hesitate using them for any kind of project in the future."

Brian N on September 2025


"Straight forward"

Matthew K on August 2024

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%. .

"Straight forward"

Matthew K on August 2024


Guilco Handyman

5.00(
38
)
Approved Pro

Guilco Handyman

5.00(
38
)
Approved Pro
Super Service Award
Customers say: True professional
169 local quotes requested
Emergency services offered

Guilco painting and handyman is a new name on the market, with operators with more than 20 years of experience in different jobs, we go to costumers from the smaller to biggest job in there house, will be happy to help.

"Best customer service! Personable, reliable, efficient, accommodating, and reasonably priced! Will use them again for many more projects. Thank you!!!"

Anna L on November 2025

Guilco painting and handyman is a new name on the market, with operators with more than 20 years of experience in different jobs, we go to costumers from the smaller to biggest job in there house, will be happy to help.

"Best customer service! Personable, reliable, efficient, accommodating, and reasonably priced! Will use them again for many more projects. Thank you!!!"

Anna L on November 2025


Avatar for SO CAL BOYS HEATING & AIR INC

SO CAL BOYS HEATING & AIR INC

4.96(
48
)
Approved Pro

SO CAL BOYS HEATING & AIR INC

4.96(
48
)
Approved Pro
Super Service Award
Customers say: True professional
13 local quotes requested
3 years of experience

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!

"This is my third time working with George from SoCal Boys Heating & Air, and once again he exceeded my expectations. He is consistently reliable, quick to respond, professional, kind, and communicates clearly and efficiently. My husband and I genuinely trust SoCal Boys with any HVAC or water heater issue?we never feel the need to look elsewhere. This time we reached out to George for a water heater issue, and as always, his pricing was honest and fair. Frankly, even if it wasn?t, we?d still call him first because the quality of his work and the peace of mind he gives us is unmatched. We?re always so happy with the service we receive. Highly recommend!"

Gladys C on November 2025

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!

"This is my third time working with George from SoCal Boys Heating & Air, and once again he exceeded my expectations. He is consistently reliable, quick to respond, professional, kind, and communicates clearly and efficiently. My husband and I genuinely trust SoCal Boys with any HVAC or water heater issue?we never feel the need to look elsewhere. This time we reached out to George for a water heater issue, and as always, his pricing was honest and fair. Frankly, even if it wasn?t, we?d still call him first because the quality of his work and the peace of mind he gives us is unmatched. We?re always so happy with the service we receive. Highly recommend!"

Gladys C on November 2025


Vasquez Construction

5.00(
2
)
Approved Pro

Vasquez Construction

5.00(
2
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
436 local quotes requested

I have been in the construction businesses for 20 plus years, and can do anything you want. I have worked in many areas of construction for example remodeling spaces, painting, building structures and so forth. I am independent owned.

"Easy communication. I needed a bathroom exhaust fan installed where there is no attic access. The project included wiring and ductwork to the exterior as well as drywall removal and repair, and then finishing everything beautifully. The two-man team of Vasquez did as instructed and also fixed some old shoddy work that was in the way of the new duct and wiring. They used good materials and did good work at a good price. They were also very respectful of my home, keeping the mess contained and cleaning up after. I would hire again."

Mark F on May 2025

I have been in the construction businesses for 20 plus years, and can do anything you want. I have worked in many areas of construction for example remodeling spaces, painting, building structures and so forth. I am independent owned.

"Easy communication. I needed a bathroom exhaust fan installed where there is no attic access. The project included wiring and ductwork to the exterior as well as drywall removal and repair, and then finishing everything beautifully. The two-man team of Vasquez did as instructed and also fixed some old shoddy work that was in the way of the new duct and wiring. They used good materials and did good work at a good price. They were also very respectful of my home, keeping the mess contained and cleaning up after. I would hire again."

Mark F on May 2025


Avatar for Brody Pennell Heating & Air Conditioning

Brody Pennell Heating & Air Conditioning

4.33(
6
)
Approved Pro

Brody Pennell Heating & Air Conditioning

4.33(
6
)
Approved Pro
142 local quotes requested
80 years of experience

In 1999, Pennell Air Conditioning and Brody Heating & Air Conditioning, both in West Los Angeles, merged and became Brody Pennell. Jack Pennell began serving Los Angeles area homeowners in 1945. Today, we carry on that great legacy of outstanding customer service as we continue to serve the next generation of our clientele. Our rapid response fleet is ready to serve you 24/7, when you need us the most. Our friendly technicians are knowledgeable and helpful, and we can fix most any problem you have. We look forward to adding you to the Brody Pennell family.

"great job "

Andrew F on November 2025

In 1999, Pennell Air Conditioning and Brody Heating & Air Conditioning, both in West Los Angeles, merged and became Brody Pennell. Jack Pennell began serving Los Angeles area homeowners in 1945. Today, we carry on that great legacy of outstanding customer service as we continue to serve the next generation of our clientele. Our rapid response fleet is ready to serve you 24/7, when you need us the most. Our friendly technicians are knowledgeable and helpful, and we can fix most any problem you have. We look forward to adding you to the Brody Pennell family.

"great job "

Andrew F on November 2025

...
Showing 1-10 of 1065
FAQs for thermostat installation and replacement projects in Los Angeles, CA

Smart thermostats may be worth it for many homeowners. They come with various features, including voice control and smartphone apps. Vacation mode can help lower energy usage when you’re out of town for an extended period. Alert warnings let you know about major spikes or drops in temperature. Smartphone apps can track energy usage, and smart thermostats can learn your routine over time to adjust your temperature and reduce wasted energy consumption automatically.

You typically do not need more than one smart thermostat. While it’s common to see multiple mechanical thermostats throughout a large home, multiple smart thermostats may try to override each other. This can lead to problems with the HVAC system. Ensure the unit you buy has the option for dual- or multi-zoned systems to avoid compatibility issues.

Installing a programmable or smart thermostat may save you $180 per year in utility costs. A big part of this comes from a smart thermostat’s ability to learn and adapt to your regular routines. With smartphone apps or web-based interfaces, you also have the option to control your thermostat when you’re not home.

The Los Angeles, CA homeowners’ guide to thermostat installations and replacements

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