Top-rated thermostat installers and replacers.

Get matched with top thermostat installers and replacers in Simi Valley, 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 Simi Valley

Avatar for Southwest Heating and Air Conditioning

Southwest Heating and Air Conditioning

5.00(
11
)
Approved Pro

Southwest Heating and Air Conditioning

5.00(
11
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
7 years of experience

With years of experience, Southwest Heating and Air Conditioning 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.

"This company was great! Very professional. The price they quoted was the price I paid, no hidden fees."

Herman S on December 2022

With years of experience, Southwest Heating and Air Conditioning 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.

"This company was great! Very professional. The price they quoted was the price I paid, no hidden fees."

Herman S on December 2022


Avatar for Pennies Air Conditioning, Solar & Construction

Pennies Air Conditioning, Solar & Construction

4.84(
19
)
Approved Pro

Pennies Air Conditioning, Solar & Construction

4.84(
19
)
Approved Pro
Customers say: Quick response
36 years of experience
Free onsite estimate

Pennies Air Conditioning-Heating repair- Solar Installation and mechanical contractor providing repairs & installation in the Lancaster Ca, Palmdale Ca, and Santa Clarita Ca, Area since 1999. We specialize HVAC repairs and installations residential and commercial.

"Good price and great work!"

Roger O on November 2025

Pennies Air Conditioning-Heating repair- Solar Installation and mechanical contractor providing repairs & installation in the Lancaster Ca, Palmdale Ca, and Santa Clarita Ca, Area since 1999. We specialize HVAC repairs and installations residential and commercial.

"Good price and great work!"

Roger O on November 2025


Avatar for RELY HVAC LLC

RELY HVAC LLC

5.00(
4
)
Approved Pro

RELY HVAC LLC

5.00(
4
)
Approved Pro
1 years of experience
Free onsite estimate

We have a single mission: Complete Customer Satisfaction! We have consistently focused on the needs of our customers, providing personalized attention and a stress-free experience. You will find us to be competitively priced with close attention to the details. Our reputation is based on service, safety, and quality, regardless of how large or small the job. We look forward to building a lasting relationship and guarantee your satisfaction!

"patient, thorough, knowledgeable and prompt. respectful and responsive when scheduling and during the job. reasonable rates! each one of those traits are hard to find these days, but all together is a treasure. Thanks a bunch!"

ben s on November 2025

We have a single mission: Complete Customer Satisfaction! We have consistently focused on the needs of our customers, providing personalized attention and a stress-free experience. You will find us to be competitively priced with close attention to the details. Our reputation is based on service, safety, and quality, regardless of how large or small the job. We look forward to building a lasting relationship and guarantee your satisfaction!

"patient, thorough, knowledgeable and prompt. respectful and responsive when scheduling and during the job. reasonable rates! each one of those traits are hard to find these days, but all together is a treasure. Thanks a bunch!"

ben s on November 2025


Avatar for Platinum Handyman

Platinum Handyman

5.00(
9
)
Approved Pro

Platinum Handyman

5.00(
9
)
Approved Pro
Customers say: Quick response
24 local quotes requested
6 years of experience

Replacing light switches and outlets, broken garbage disposals, repairing a leaky faucet, replacing a thermostat, or even hanging a picture. Painting Lawn Sprinklers Electrical Door Hanging Trim Bathrooms Flooring Flower boxes

"Great job replacing the door. "

Olga D on November 2025

Replacing light switches and outlets, broken garbage disposals, repairing a leaky faucet, replacing a thermostat, or even hanging a picture. Painting Lawn Sprinklers Electrical Door Hanging Trim Bathrooms Flooring Flower boxes

"Great job replacing the door. "

Olga D on November 2025


Avatar for Kings Comfort & Climate Solutions Inc.

Kings Comfort & Climate Solutions Inc.

5.00(
1
)
Approved Pro

Kings Comfort & Climate Solutions Inc.

5.00(
1
)
Approved Pro
1 years of experience
Free onsite estimate

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"He put in all the mini split systemes in my house, he is a great worker and I would hire him again."

Nick D on September 2025

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"He put in all the mini split systemes in my house, he is a great worker and I would hire him again."

Nick D on September 2025


Vasquez Construction

5.00(
4
)
Approved Pro

Vasquez Construction

5.00(
4
)
Approved Pro
Customers say: Quality work
156 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.

"Very friendly and knowledgeable"

Andre C on December 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.

"Very friendly and knowledgeable"

Andre C on December 2025


"He showed up to assess the job. We agreed on a price. He told me he was busy for a month so I waited. The day before the job he messaged me to send him more than half up front or he wasn?t coming. He never mentioned advanced payment. I said I wasn?t comfortable but would certainly pay him as agreed for the job. He told me he wasn?t coming if I didn?t send him money first. For a handyman? Leave me waiting for a month then demand payment up front before doing one minute of work? Totally unprofessional!!! Time waster!"

John J on November 2025

2 employees. Occasionally uses subs for hardwood floors. Cost is determined by the job. No travel charges. No service charges. No extra charge for after hours service.

"He showed up to assess the job. We agreed on a price. He told me he was busy for a month so I waited. The day before the job he messaged me to send him more than half up front or he wasn?t coming. He never mentioned advanced payment. I said I wasn?t comfortable but would certainly pay him as agreed for the job. He told me he wasn?t coming if I didn?t send him money first. For a handyman? Leave me waiting for a month then demand payment up front before doing one minute of work? Totally unprofessional!!! Time waster!"

John J on November 2025


California mechanical solutions

No reviews yet

California mechanical solutions

No reviews yet
33 years of experience

Service,repair,install,sales all hvacr from residential,commercial,industrial to earthlink systems, refrigeration low temps,ice machines,walk ins ,high rises ,chillers,boilers,cooling towers,heat pumps ,geothermal technology.

Service,repair,install,sales all hvacr from residential,commercial,industrial to earthlink systems, refrigeration low temps,ice machines,walk ins ,high rises ,chillers,boilers,cooling towers,heat pumps ,geothermal technology.


Avatar for Angel Construction

Angel Construction

5.00(
4
)

Angel Construction

5.00(
4
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Angel Construction is a trustworthy and hardworking company started by Luis Angel and his father Juan who have been working in this field for many years. Striving to deliver excellent services with the best pricing available, Angel Construction is your solution to home foundation needs and other repairs.

"Hired Luis for a complete foundation replacement for a home on a hill in Angelino Heights. Luis was very easy to work with from coordinating plans/permits, keeping to schedule, and scope changes along the way (LA City was a PITA). Luis was easy to talk to and his pricing was the best out of 5+ bids we got. Work involved replacing the entire footing/foundation, leveling interior floors, adding a few posts and support beams under the raised foundation, and replacing front patio cement area. Luis was always looking out for our bottom line and very efficient. Normally the type of foundation replacement we did requires multiple inspector visits but Luis knew the process well and only required one inspection after work was done, saving us a lot of money. Change orders were always handled professionally and very fair to both sides. Everything turned out great (I'm writing this review a year later). I highly recommend Angel Construction and wouldn't hesitate to hire them again."

James S on May 2025

Angel Construction is a trustworthy and hardworking company started by Luis Angel and his father Juan who have been working in this field for many years. Striving to deliver excellent services with the best pricing available, Angel Construction is your solution to home foundation needs and other repairs.

"Hired Luis for a complete foundation replacement for a home on a hill in Angelino Heights. Luis was very easy to work with from coordinating plans/permits, keeping to schedule, and scope changes along the way (LA City was a PITA). Luis was easy to talk to and his pricing was the best out of 5+ bids we got. Work involved replacing the entire footing/foundation, leveling interior floors, adding a few posts and support beams under the raised foundation, and replacing front patio cement area. Luis was always looking out for our bottom line and very efficient. Normally the type of foundation replacement we did requires multiple inspector visits but Luis knew the process well and only required one inspection after work was done, saving us a lot of money. Change orders were always handled professionally and very fair to both sides. Everything turned out great (I'm writing this review a year later). I highly recommend Angel Construction and wouldn't hesitate to hire them again."

James S on May 2025


Thermo Cooling

No reviews yet

Thermo Cooling

No reviews yet
36 years of experience

Founded in 1990, Thermo Cooling services the greater Los Angeles area for all your commercial and residential heating and air condition needs.

Founded in 1990, Thermo Cooling services the greater Los Angeles area for all your commercial and residential heating and air condition needs.

...
Showing 1-10 of 1013
FAQs for thermostat installation and replacement projects in Simi Valley, 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 Simi Valley, 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.