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Find Thermostat installers and replacers in Los Angeles

Avatar for Trinity Heating and AC
Trinity Heating and AC
5.0(
43
)
Thermostat - Install or Replace

Serving Los Angeles, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Warranties offered

"Trinity Heating installed a new thermostat in my house. The technician, Jimmy, was professional and courteous. After the installation he took the time to explain to me how to set up and use the new thermostat. I’m completely satisfied with their service and will use them again if needed."
Furnace Before
AC After
Furnace After
AC Before
Before - Furnace

+83

Response time3 hrs
Response rate98%
39 neighbors recently requested a quote
Avatar for Belle Air Services
Belle Air Services
4.7(
70
)
Thermostat - Install or Replace

Serving Los Angeles, CA and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"Service was great and pricing very competitive. Nick Knuth was very knowledgeable when he came to do an assessment of the work to be done, and answered all my questions I'm a very clear way. The techs worked pretty quickly and efficiently when installing the new unit. Deisy and Emma from the office always made sure that things were taken care of and went above and beyond with follow-ups and updates. I would definitely recommend them to anyone who needs this service."
VRV - Multizone Comfort
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+9

Response time1 day
Response rate100%
3 neighbors recently requested a quote
Avatar for DNA Heating & Cooling, Inc.
DNA Heating & Cooling, Inc.
4.8(
57
)
Thermostat - Install or Replace

Serving Los Angeles, CA and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Our experience with DNA was excellent. As soon as I contacted them, Andrew called and visited us. He quickly inpected our attic, which had had a major rat infestation and extremely old heater ducts. He gave us a reasonable estimate for cleaning and sanitizing the attic, replacing the old insulation, and installing new ducts. The crew of Ivan, Andrew, Amanda and Denicio worked quickly and were very personable, reliable and efficient. They kindly removed all the old boxes stored in the attic which was not part of the original work. We especially liked that Andrew followed up with us after the job was completed, to ensure we were satisfied, and offering to come and fix any problems we might have. We could not be happier with DNA and highly recommend them for any heating issues."
New Blown in insulation
New R-30 blown in insulation
Recessed Light cover
Foam Gun
Sealed Plumbing attic penetrations

+26

Response time5 hrs
4 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Penguin Heating and Air Inc
Penguin Heating and Air Inc
5.0(
15
)
Thermostat - Install or Replace

Serving Los Angeles, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"I highly recommend this company. Penguin heating & Air was very quick to respond to my request, fast text reply, sent them pics, they replied with a quote, which was way lower than anyone else on this site, or even our regular guy that we normally use, we scheduled an appointment for the very next day, which was today, he also finished the job the same day! David did a very good job, very professional. Despite a terrible rainy day, he got the job done. When he was done he walked me through with exactly what he did. He also quoted me for a service on an existing unit and his quote was almost $200 less than what our regular guy charges us... We will absolutely be using this company again."
Diamond Bar
Diamond Bar
Diamond Bar
Furnace Install
AC Condenser

+6

Response time2 hrs
Response rate100%
22 neighbors recently requested a quote
Avatar for Patagonia HVAC, LLC
Patagonia HVAC, LLC
5.0(
11
)
Thermostat - Install or Replace

Serving Los Angeles, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"I first used Patagonia HVAC when my home AC broke. Guillermo, the owner, responded promptly and provided a quote for the repair. He worked with me to find the best new system within my budget and completed the installation within days. He was incredibly professional, and my AC has been working wonderfully ever since! I later hired him when the AC went down at my grocery store, and Guillermo had it repaired the very same day we called. I couldn’t recommend Patagonia HVAC more highly!"
14 neighbors recently requested a quote
Avatar for Local Home Services Inc.
Local Home Services Inc.
4.9(
28
)
Thermostat - Install or Replace

Serving Los Angeles, CA and surrounding areas

Approved

In business since 2017

Credit card accepted

Customers say: True professional

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%. .

Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+27

Response time1 day
10 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for West Coast Chief Repair, Inc.
West Coast Chief Repair, Inc.
3.6(
1,830
)
Thermostat - Install or Replace

Serving Los Angeles, CA and surrounding areas

Approved

In business since 1996

Emergency services offered

Warranties offered

"There was just miscommunication in the beginning. I called to confirm my appointment as the technician was now late. They didnâ t have me down for that day or any record of my call. I then had to wait for parts to be ordered after diagnosing the broken freezer. I didnâ t know if he was going to order it. He said to call the office and tell them to order it which seemed weird. Then I couldnâ t pull out the refrigerator to unplug it myself in order to let it sit for 24 hours defrosting once the parts were in.. I was told on the phone that I had a circuit to the fridge that I could turn off. He had never seen my outdated box. Finally had it repaired which was quick at that point. Knowledgeable technician though."
All Major Appliance Repair
Sunset, West Hollywood
All Major Appliance Repair
All Major Appliance Repair
Response time4 hrs
Recommended by71%of homeowners
Avatar for Michael Howard Plumbing-Rooter-Heating-Air Conditioning
Michael Howard Plumbing-Rooter-Heating-Air Conditioning
4.5(
55
)
Thermostat - Install or Replace

Serving Los Angeles, CA and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"He serviced my air conditioning unit, took care of two leaks in the unit and replaced my old thermostat. The unit itself works better than it even did when it was first installed."
Response time8 hrs
6 neighbors recently requested a quote
Recommended by90%of homeowners
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Showing 1-10 of 374
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.