Homeβ€ΊServicesβ€ΊThermostat Upgrade

Thermostat Upgrade in Los Angeles

Upgrade your old thermostat to a modern, energy-saving model.

(323) 970-3113Free estimate
CSLB #1073586
CA Licensed
5.0 Stars
300+ Reviews
20+ Years
Serving LA since 2004
Same Day
Service available
24/7
Emergency calls
About this service

What to expect from LC Heating & Air

### When to Upgrade Your Thermostat If you're still using a mercury dial thermostat, a basic non-programmable digital thermostat, or a programmable model you've never actually programmed, a thermostat upgrade is one of the quickest and most cost-effective HVAC improvements available. A properly configured smart or programmable thermostat that matches your schedule eliminates the energy waste of conditioning an empty house β€” in Los Angeles, where summer cooling runs heavily, this saving is real and recurring every year.

Overview

### Mercury Thermostats: Time to Replace Mercury bulb thermostats β€” the classic round white Honeywell dial type β€” are still functioning in many older Los Angeles homes. They work, but they contain mercury (a hazardous material requiring special disposal), have no programming capability, and often have temperature sensing accuracy of Β±3–5Β°F. Modern thermostats have Β±0.5Β°F accuracy and programmable scheduling. The upgrade cost is minimal and the improvement is immediate.

### What a Thermostat Upgrade Can Accomplish Beyond the obvious remote access and scheduling benefits of smart thermostats, an upgrade often resolves comfort complaints that have been attributed to the HVAC equipment. A thermostat with inaccurate temperature sensing causes the system to over-run or under-run. A thermostat with a placement problem (in direct sunlight, near a heat source, or in a poorly representative location) reads incorrectly regardless of how good its sensor is. Ecobee's remote room sensors address placement issues by allowing the system to respond to temperature in occupied rooms rather than the thermostat wall location.

### We Handle Everything LC Heating & Air handles the full thermostat upgrade process: compatibility verification, C-wire installation if needed, device installation and wiring, Wi-Fi and app setup, schedule programming, and testing both heating and cooling modes before we leave. You don't touch a wire.

Our Service Benefits

Immediate energy savings
A properly programmed thermostat with occupied/unoccupied setpoints typically saves 10–15% of HVAC energy β€” real savings at LA cooling costs.
Better comfort accuracy
Modern thermostats with Β±0.5Β°F accuracy maintain setpoint more precisely than older models with Β±3–5Β°F swing.
Remote access
Control your HVAC from anywhere, check status, and receive alerts about system problems before they become emergencies.
Complete installation service
We handle everything β€” compatibility check, C-wire, installation, setup, and training β€” in a single visit.

Thermostat Upgrade Cost in Los Angeles

Pricing ranges for common thermostat upgrade services. Your actual cost depends on equipment, complexity, and home configuration. We provide an exact written estimate before any work begins.

Thermostat diagnostic
$125–$175
Thermostat installation
$175–$350
Smart thermostat upgrade
Includes device and programming
$250–$500

Service calls start at $125. Prices include parts and labor unless noted. Financing available on equipment installations. Learn about financing β†’

What Los Angeles Homeowners Say

β€œHad LC install a mini split in our 1940s bungalow. The work was clean, the unit is incredibly quiet. Highly recommend.”

J
Jennifer L.Hollywood, CA

β€œFurnace was making a loud noise. LC diagnosed it quickly, cleaned and tuned the whole system, tested CO levels, explained everything clearly.”

K
Kevin A.Burbank, CA

β€œWe converted our garage into an ADU and needed HVAC. LC installed a mini split β€” permits, electrical, everything. Our tenant loves it.”

C
Carlos M.Silver Lake, CA

Book Thermostat Upgrade today.

Get a fast, accurate estimate from our certified local technicians right now.

CSLB #1073586
Same-day service
5.0β˜… Google Β· 300+ reviews
Warning signs

Signs you need thermostat upgrade

Still using a mercury dial thermostat or basic non-programmable digital model
No setback scheduling β€” cooling an empty house during peak daytime hours
Want to reduce energy use and earn possible utility rebates
Getting a new HVAC system and want to upgrade the thermostat too
Comfort complaints that may be related to thermostat placement or accuracy
Current thermostat is becoming unreliable β€” display issues or intermittent operation

Not sure if you need service? Call us β€” we'll give you an honest answer.

(323) 970-3113 β€” Free diagnosis
How it works

Our thermostat upgrade process

01

System and compatibility assessment

We identify your HVAC system type, check existing wiring, and recommend appropriate thermostat options.

02

C-wire and wiring preparation

We run a C-wire if required and verify all wiring is in good condition before installation.

03

Thermostat installation

We install the new thermostat, connect all wiring per manufacturer specifications, and mount it level.

04

Full setup and training

Wi-Fi connection, app setup, schedule programming, and a walkthrough of the interface before we leave.

Customer Reviews

300+ verified reviews

5.0
Google Reviews196 reviews on Google
SM
Sharon Meoded
Los Angeles, CA

β€œLior and his team installed an AC unit in my room that doesn’t have central AC and it works amazing! They were so professional and cleaned up fully after themselves. He kept me in the loop the entire process and when he came out prior to installing showed me step by step what they would be doing! Highly recommend ! Super professional”

Google Review
PW
Patricia Williams
Los Angeles, CA

β€œLC Heating and Air is a reliable, affordable solution for all your central air and heating needs. I am an out of town landlord and it can be difficult to find the assistance I need. LC Heating and Air took care of my tenants issues quickly and explained all issues before making necessary repairs. I will def use them again if need be!”

Google Review
NE
Naomi Eagleson
Los Angeles, CA

β€œI hired LC Heating & AC to replace the drain pumps in our Mitsubishi Mini Splits and clean the condenser and was pleased with the service. Leo was responsive, thorough, and professional. I chose this company based on the glowing reviews I read online and wasn't disappointed. My husband and I look forward to using our AC this summer!”

Google Review
OI
Osher Itzhaki
Los Angeles, CA

β€œAmazing service!! I called LC heating and air and was fortunate enough to have scheduled them for a same day appointment . Leo arrived on time and was super friendly, polite and fixed my ax in no time . The price was fair and he explained what further steps I shouted take to keep my ac unit running for more years Thank you LC!!!”

Google Review
JS
Justin Shapiro
West Hollywood, CA

β€œGreat experience!!’ Leo came to my house in West Hollywood at 9pm !! I had an emergency, my ac stopped working out of no where i called LC heating and air from the phone call with the office to the time the tech came the service was just amazing. Leo came and had my ac running in no time. Thank you so much !! Highly recommended”

Google Review
GH
Greg Haroutunian
Los Angeles, CA

β€œSunday morning discovered AC in the unit is not working, called everywhere, no one wanted to come the same day. LC Heating came the same day, fixed the problem which apparently wasn't easy to figure out. Very professional, calm and confident, pleasant to work with. Leo was the lead guy. Great experience, highly recommend it!”

Google Review
AV
Adam Valdies
Los Angeles, CA

β€œLeo and his team were amazing! I am so glad we called them to handle our AC/Heating issue. The problem was not clear at first and required substantial troubleshooting but Leo was extremely communicative and very professional throughout! He figured out the problem and we cannot thank him enough! Highly recommend!”

Google Review
LO
Leeyam Ohayon
Los Angeles, CA

β€œI called LC Heating & Air when my heating unit stopped working. He came quickly and fixed the problem fast. The technician was very kind and experienced. He explained the problem to me and gave me maintenance tips for the future. I definitely recommend LC Heating and Air if you're in need of these services.”

Google Review
AY
ariel. yona.
Los Angeles, CA

β€œAmazingly service me heater broke down and I was looking for a local company in my neighborhood. I found LC heating and air I can’t express in words how pleased I was with this company the owner Leo came out was very professional friendly and fixed my heater in no time !!! Highly recommended”

Google Review
KB
kevin benoit
Los Angeles, CA

β€œI cannot recommend this company more. They came, assess my issue and then ordered the right parts from the company and made an amazing install and transform my AC unit into a smart controlled AC unit which no Other HVAC company was able to do, or wanted to take the time that it took to do it”

Google Review
TY
Todd Yasuda
Los Angeles, CA

β€œAsher (LC Heating & Air) is the best, he kept me informed throughout the whole process. Everything he told me is exactly how things were done. I couldn’t have asked for a better person to work with. If you want to work with a reliable person and company, I would highly recommend him.”

Google Review
CK
claudia kleinschmidt
Los Angeles, CA

β€œOur AC was broken and had been dripping for a couple days. Once we called LC heating and air they sent out Asher to fix it immediately. He checked out the AC and fixed the problem on the spot. He was super professional and informative. Highly recommend Asher and the company!”

Google Review
DF
D Fan
Los Angeles, CA

β€œLeo is the absolute best! Had an emergency call and he came out right away in the early evening. Showed me how my units work and what the problem was. A few minutes later, it was fixed and working again! I cannot recommend this guy more highly. Call him and you'll be happy!”

Google Review
JM
Jamie Morgan
Los Angeles, CA

β€œLC Heating and AC is the best! I couldn’t recommend enough. It was a 100/10 experience. Helped me get to the bottom of repairing my AC that was very complicated and messed up by someone else. They are very professional and kind on top be being super knowledgeable.”

Google Review
DA
dan amiel
Los Angeles, CA

β€œGreat service my heater stopped working out of the blue and we just had a new born I called lc heating and air they were the only ones that answered they came out and a hour my heater was up and running I couldn’t thank them enough . Highly recommended”

Google Review
YG
Yane G.
Los Angeles, CA

β€œVery helpful and very respectful. I called for a repair and was answered immediately, they were great in explaining what was going wrong and how they would fix it i was glad with there work and would definitely be calling them for any future repairs.”

Google Review
LA
Leetal Adelle Cohen
Los Angeles, CA

β€œWe reached out to Leo and had a new HVAC system installed by him and his crew. Very happy with the results! Very professional, knowledgeable and patient. The whole process was very smooth, quick and clean. System works perfectly. Highly recommend”

Google Review
AM
Agam Mashiah
Los Angeles, CA

β€œI called lc heating to fix my heater in my house . We decided to replace the heater throughout the whole out process the customer service was great they were very communicative, professional and were very clean . Thank you again for the great job”

Google Review
CR
Charles Raffini
Los Angeles, CA

β€œHVAC system was leaking in the attic. Leo took my call late at night and came immediately. He stopped the leak and came back to make sure the system was working properly. Very responsive, good work and great value. Highly recommend them.”

Google Review
YY
yoav yerushalmi
Los Angeles, CA

β€œScheduled an appointment very quickly for our HVAC unit that was having trouble cooling. Were very meticulous and clean. Helped idenitfy the issue and did a great job explaining what needs to be done and doing it. Highly recommended...”

Google Review
SM
Sharon Meoded
Los Angeles, CA

β€œLior and his team installed an AC unit in my room that doesn’t have central AC and it works amazing! They were so professional and cleaned up fully after themselves. He kept me in the loop the entire process and when he came out prior to installing showed me step by step what they would be doing! Highly recommend ! Super professional”

Google Review
PW
Patricia Williams
Los Angeles, CA

β€œLC Heating and Air is a reliable, affordable solution for all your central air and heating needs. I am an out of town landlord and it can be difficult to find the assistance I need. LC Heating and Air took care of my tenants issues quickly and explained all issues before making necessary repairs. I will def use them again if need be!”

Google Review
NE
Naomi Eagleson
Los Angeles, CA

β€œI hired LC Heating & AC to replace the drain pumps in our Mitsubishi Mini Splits and clean the condenser and was pleased with the service. Leo was responsive, thorough, and professional. I chose this company based on the glowing reviews I read online and wasn't disappointed. My husband and I look forward to using our AC this summer!”

Google Review
OI
Osher Itzhaki
Los Angeles, CA

β€œAmazing service!! I called LC heating and air and was fortunate enough to have scheduled them for a same day appointment . Leo arrived on time and was super friendly, polite and fixed my ax in no time . The price was fair and he explained what further steps I shouted take to keep my ac unit running for more years Thank you LC!!!”

Google Review
JS
Justin Shapiro
West Hollywood, CA

β€œGreat experience!!’ Leo came to my house in West Hollywood at 9pm !! I had an emergency, my ac stopped working out of no where i called LC heating and air from the phone call with the office to the time the tech came the service was just amazing. Leo came and had my ac running in no time. Thank you so much !! Highly recommended”

Google Review
GH
Greg Haroutunian
Los Angeles, CA

β€œSunday morning discovered AC in the unit is not working, called everywhere, no one wanted to come the same day. LC Heating came the same day, fixed the problem which apparently wasn't easy to figure out. Very professional, calm and confident, pleasant to work with. Leo was the lead guy. Great experience, highly recommend it!”

Google Review
AV
Adam Valdies
Los Angeles, CA

β€œLeo and his team were amazing! I am so glad we called them to handle our AC/Heating issue. The problem was not clear at first and required substantial troubleshooting but Leo was extremely communicative and very professional throughout! He figured out the problem and we cannot thank him enough! Highly recommend!”

Google Review
LO
Leeyam Ohayon
Los Angeles, CA

β€œI called LC Heating & Air when my heating unit stopped working. He came quickly and fixed the problem fast. The technician was very kind and experienced. He explained the problem to me and gave me maintenance tips for the future. I definitely recommend LC Heating and Air if you're in need of these services.”

Google Review
AY
ariel. yona.
Los Angeles, CA

β€œAmazingly service me heater broke down and I was looking for a local company in my neighborhood. I found LC heating and air I can’t express in words how pleased I was with this company the owner Leo came out was very professional friendly and fixed my heater in no time !!! Highly recommended”

Google Review
KB
kevin benoit
Los Angeles, CA

β€œI cannot recommend this company more. They came, assess my issue and then ordered the right parts from the company and made an amazing install and transform my AC unit into a smart controlled AC unit which no Other HVAC company was able to do, or wanted to take the time that it took to do it”

Google Review
TY
Todd Yasuda
Los Angeles, CA

β€œAsher (LC Heating & Air) is the best, he kept me informed throughout the whole process. Everything he told me is exactly how things were done. I couldn’t have asked for a better person to work with. If you want to work with a reliable person and company, I would highly recommend him.”

Google Review
CK
claudia kleinschmidt
Los Angeles, CA

β€œOur AC was broken and had been dripping for a couple days. Once we called LC heating and air they sent out Asher to fix it immediately. He checked out the AC and fixed the problem on the spot. He was super professional and informative. Highly recommend Asher and the company!”

Google Review
DF
D Fan
Los Angeles, CA

β€œLeo is the absolute best! Had an emergency call and he came out right away in the early evening. Showed me how my units work and what the problem was. A few minutes later, it was fixed and working again! I cannot recommend this guy more highly. Call him and you'll be happy!”

Google Review
JM
Jamie Morgan
Los Angeles, CA

β€œLC Heating and AC is the best! I couldn’t recommend enough. It was a 100/10 experience. Helped me get to the bottom of repairing my AC that was very complicated and messed up by someone else. They are very professional and kind on top be being super knowledgeable.”

Google Review
DA
dan amiel
Los Angeles, CA

β€œGreat service my heater stopped working out of the blue and we just had a new born I called lc heating and air they were the only ones that answered they came out and a hour my heater was up and running I couldn’t thank them enough . Highly recommended”

Google Review
YG
Yane G.
Los Angeles, CA

β€œVery helpful and very respectful. I called for a repair and was answered immediately, they were great in explaining what was going wrong and how they would fix it i was glad with there work and would definitely be calling them for any future repairs.”

Google Review
LA
Leetal Adelle Cohen
Los Angeles, CA

β€œWe reached out to Leo and had a new HVAC system installed by him and his crew. Very happy with the results! Very professional, knowledgeable and patient. The whole process was very smooth, quick and clean. System works perfectly. Highly recommend”

Google Review
AM
Agam Mashiah
Los Angeles, CA

β€œI called lc heating to fix my heater in my house . We decided to replace the heater throughout the whole out process the customer service was great they were very communicative, professional and were very clean . Thank you again for the great job”

Google Review
CR
Charles Raffini
Los Angeles, CA

β€œHVAC system was leaking in the attic. Leo took my call late at night and came immediately. He stopped the leak and came back to make sure the system was working properly. Very responsive, good work and great value. Highly recommend them.”

Google Review
YY
yoav yerushalmi
Los Angeles, CA

β€œScheduled an appointment very quickly for our HVAC unit that was having trouble cooling. Were very meticulous and clean. Helped idenitfy the issue and did a great job explaining what needs to be done and doing it. Highly recommended...”

Google Review
Review us on GoogleReview us on Yelp
Service areas

Thermostat Upgrade β€” by city

FAQ

Common questions about thermostat upgrade in Los Angeles

What is the best thermostat upgrade for an LA home?
For most LA homes: the Ecobee SmartThermostat or Nest Learning Thermostat are the top two options. The Ecobee's included room sensor is valuable in open-plan homes where the thermostat wall isn't representative of occupied space temperature. The Nest is simpler to use and integrates well with Google Home. Both are excellent for LA's cooling-dominated climate.
How much energy can I save by upgrading my thermostat?
The energy savings from a thermostat upgrade depend heavily on your current thermostat behavior. If you're currently running your AC at 72Β°F 24/7 and you upgrade to a thermostat that raises the setpoint to 82Β°F during unoccupied hours, you can save 20–30% of your cooling energy. More conservative setback provides proportionally less savings. The thermostat manufacturer apps show actual savings by month.
Will a smart thermostat work with my older HVAC system?
Usually yes. Smart thermostats are compatible with most residential HVAC systems manufactured in the last 30+ years that use standard 24VAC control wiring. Exceptions: communicating systems (Carrier Infinity, Lennox iComfort) require their own communicating thermostats. Very old systems with line-voltage thermostats (240V) require different thermostat types entirely. We verify compatibility before installation.
How much does a thermostat upgrade cost in Los Angeles?
Thermostat upgrade (including the device and full installation): $250–$450 for a smart Wi-Fi thermostat (Ecobee, Nest, Honeywell T6 Pro) with C-wire installation if needed. Basic programmable upgrade: $150–$250. We provide a written estimate.
Can I upgrade my thermostat myself?
Many homeowners successfully upgrade standard thermostats themselves. The process is more complex if: you have a heat pump (wiring differences can cause damage if done wrong), you need a C-wire (requires accessing the air handler), or you have a communicating system. When in doubt, professional installation ensures it's done correctly the first time.
Do I need to replace my thermostat when I get a new HVAC system?
Not necessarily β€” if your current thermostat is compatible with the new equipment, it can stay. However, if you're investing in a new system, upgrading to a smart thermostat at the same time is the most convenient and cost-effective moment to do it. Coordinating the thermostat upgrade with system installation means only one visit and one set of wiring work.
Are there rebates for thermostat upgrades in LA?
Some smart thermostat models qualify for SCE rebates under demand response programs β€” typically $50–$75. These programs allow the utility to slightly adjust your thermostat setpoint during peak demand events in exchange for the rebate. Participation is voluntary and you can override any utility adjustments. We identify applicable rebates for your thermostat model.
What should I do with my old mercury thermostat?
Mercury thermostats contain a mercury-filled glass bulb that is hazardous and cannot go in regular trash. Many HVAC contractors (including us), hardware stores, and household hazardous waste facilities accept mercury thermostats for proper disposal. The Thermostat Recycling Corporation also accepts them at participating retail locations. We take the old thermostat when we do the upgrade.
Verified Reviews

What customers say about thermostat upgrade

Verified reviews from Los Angeles homeowners who used our thermostat upgrade service.

5.0 β˜… Google
300+ verified reviews

β€œLC installed a Nest thermostat and programmed it for our schedule. They also found that our secondary heat exchanger had a small crack during the check-in β€” caught a potential CO issue before it became dangerous.”

S
Sandra K.
Brentwood, CA Β· Nov 2025

β€œOur AC stopped working during a heat wave and LC had a technician here within two hours. He diagnosed a bad capacitor, had the part on his truck, and fixed it on the spot. Fair price, no upsell. Will use again.”

M
Maria R.
Sherman Oaks, CA Β· Aug 2025

β€œLC replaced our entire HVAC system β€” new Carrier condenser, furnace, and coil. Leo walked us through every option without pressure. The install team was professional and clean. System runs perfectly and our electricity bill dropped about 30%.”

D
David K.
Pasadena, CA Β· Nov 2025
Read all 300+ Google reviews β†’
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Don't wait for it to break.
Same-day service, honest pricing, 20 years in LA.

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