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Thermostat installers and replacers in San Marcos

Avatar for PR Wave Mechanical Contractors
PR Wave Mechanical Contractors
1515 S Melrose Dr, Unit 172
5.00(
4
)
Approved Pro
PR Wave Mechanical Contractors
1515 S Melrose Dr, Unit 172
5.00(
4
)
Approved Pro
Customers say: Quick response
3 years of experience
Emergency services offered

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! Book with us online or feel free to give us a call today!

"Had them fix up a heat pump installation done poorly by a different vendor. Everything looks amazing now and I'm really glad I went with them, their work is top notch. I really appreciate how their quote was itemized so you know what you're paying for rather than a single lump sum quote. They not only addressed all the problems I had identified, but also suggested several other improvements that could be done to the system and other maintenance on the roof. No pressure, but they were things I was happy to have them take care of too."

Joseph P on March 2025

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! Book with us online or feel free to give us a call today!

"Had them fix up a heat pump installation done poorly by a different vendor. Everything looks amazing now and I'm really glad I went with them, their work is top notch. I really appreciate how their quote was itemized so you know what you're paying for rather than a single lump sum quote. They not only addressed all the problems I had identified, but also suggested several other improvements that could be done to the system and other maintenance on the roof. No pressure, but they were things I was happy to have them take care of too."

Joseph P on March 2025


Cool Air for You
1536 Fayette Street
4.64(
50
)
Approved Pro
Cool Air for You
1536 Fayette Street
4.64(
50
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
25 years of experience

Quality Mechanical Professionals, Inc. is here to serve you!

"All of these 5 star reviews are fake!!! Look at yelp where Vadim cannot use his Ukrainian scammer contacts to creat fake reviews. Do not hire this company. This man will take your money and do no work. "

Ethan S on January 2025

Quality Mechanical Professionals, Inc. is here to serve you!

"All of these 5 star reviews are fake!!! Look at yelp where Vadim cannot use his Ukrainian scammer contacts to creat fake reviews. Do not hire this company. This man will take your money and do no work. "

Ethan S on January 2025


Avatar for Airtime Heating and Air
Airtime Heating and Air
North County
4.87(
15
)
Approved Pro
Airtime Heating and Air
North County
4.87(
15
)
Approved Pro
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
374 local quotes requested

AirTime Heating and Air Conditioning Company prides ourselves in quality work. We are The best business to call for your Heating And Cooling needs at 951-541-0151. We service and repair all brands of central air conditioning units, furnace and heating systems throughout the San Marcos area, including the towns of Vista, Escondido, Fallbrook, Rancho Bernado, as Well as the Temecula Valley, Murrieta, Menifee and surrounding areas. With an A+ rating from the Better Business Bureau you can rest assured that our HVAC contractor services are second to none in terms of pricing, quality of work and customer service. Our job is to keep your home cool in the hot summer weather, and warm during those chilly winter months. Additional email: wayne@airtime-socal.com

"It went well. I wrote a 5 star review on google.com/review. I would recommend them to anyone needing HVAC services."

John H on April 2025

AirTime Heating and Air Conditioning Company prides ourselves in quality work. We are The best business to call for your Heating And Cooling needs at 951-541-0151. We service and repair all brands of central air conditioning units, furnace and heating systems throughout the San Marcos area, including the towns of Vista, Escondido, Fallbrook, Rancho Bernado, as Well as the Temecula Valley, Murrieta, Menifee and surrounding areas. With an A+ rating from the Better Business Bureau you can rest assured that our HVAC contractor services are second to none in terms of pricing, quality of work and customer service. Our job is to keep your home cool in the hot summer weather, and warm during those chilly winter months. Additional email: wayne@airtime-socal.com

"It went well. I wrote a 5 star review on google.com/review. I would recommend them to anyone needing HVAC services."

John H on April 2025


Avatar for Anderson Plumbing Heating & Air
Anderson Plumbing Heating & Air
1830 John Towers Ave
4.40(
993
)
Approved Pro
Anderson Plumbing Heating & Air
1830 John Towers Ave
4.40(
993
)
Approved Pro
Customers say: Super punctual
2287 local quotes requested
47 years of experience

Need a licensed and efficient plumbing, drain, heating or air conditioning professional? San Diegans have trusted their homes to us for over 40 years! We have the experience, training and tools to expertly detect and fix leaks, clear drains, repair sewer lines, and to repair, service and install all brands of heating and AC systems. We stand behind our 100% Satisfaction Guarantee, and "Nobody wows clients like we do!" Before you decide who gets your business, there are a few more things you should know about us: - We are Licensed and Insured - We are a woman-owned, family business. We take pride in our policies and procedures that ensure you get the extra care your family deserves. - We want you to be safe in your home. We conduct some of the strictest background checks in our industry. We even do a personality profile test on every employee... making sure we have the right person for the job. - We offer the strongest guarantees in the industry ... always in writing! - We believe in paying it forward. We support a number of local non-profits such as Susan G. Komen - San Diego, the USO, Girl Scouts and many more. How can we make you smile today?

"I can't say enough good things about Anderson Plumbing Heating & Air. Due to an illness in the family, my daughter was bringing her 6 year old and two year old to visit. Two days before her arrival, in the evening, we had a massive water leak in the kitchen sink. Imaging a non-working kitchen sink with 2 small boys! Not only did they come first thing the next morning, they discovered that the spray hose was broken off from the faucet: it needed replacing. Within a couple of hours, they sent a truck loaded with parts and had the faucet to match our sink exactly and had the job done by that afternoon. They saved the day! The on July 2 in the evening our kitchen sink clogged. We were having people over on the 4th. Once again, they showed up early on July 3, and found that the line needed to be cleared with a snake, which they did. They also sent over a guy who crawled under our house and discovered that the pipes were in bad shape (we had been having water back up from our washing machine from time to time for a few years). They came and replaced an extensive amount of 70 year old cast iron drain pipes for a very reasonable price. After this, we were still having some backup with our washer, and a couple of other minor problems, so the next day they came out and spent a few hours doing additional work AT NO CHARGE to get everything working properly. They have the most customer service oriented policies of any contractor I have ever used. If they do any work without a signed bid, then the work is free. They are a bit more expensive than average, but their guarantees and first class service make them my number 1 choice in San Diego County."

Danton S on August 2019

Need a licensed and efficient plumbing, drain, heating or air conditioning professional? San Diegans have trusted their homes to us for over 40 years! We have the experience, training and tools to expertly detect and fix leaks, clear drains, repair sewer lines, and to repair, service and install all brands of heating and AC systems. We stand behind our 100% Satisfaction Guarantee, and "Nobody wows clients like we do!" Before you decide who gets your business, there are a few more things you should know about us: - We are Licensed and Insured - We are a woman-owned, family business. We take pride in our policies and procedures that ensure you get the extra care your family deserves. - We want you to be safe in your home. We conduct some of the strictest background checks in our industry. We even do a personality profile test on every employee... making sure we have the right person for the job. - We offer the strongest guarantees in the industry ... always in writing! - We believe in paying it forward. We support a number of local non-profits such as Susan G. Komen - San Diego, the USO, Girl Scouts and many more. How can we make you smile today?

"I can't say enough good things about Anderson Plumbing Heating & Air. Due to an illness in the family, my daughter was bringing her 6 year old and two year old to visit. Two days before her arrival, in the evening, we had a massive water leak in the kitchen sink. Imaging a non-working kitchen sink with 2 small boys! Not only did they come first thing the next morning, they discovered that the spray hose was broken off from the faucet: it needed replacing. Within a couple of hours, they sent a truck loaded with parts and had the faucet to match our sink exactly and had the job done by that afternoon. They saved the day! The on July 2 in the evening our kitchen sink clogged. We were having people over on the 4th. Once again, they showed up early on July 3, and found that the line needed to be cleared with a snake, which they did. They also sent over a guy who crawled under our house and discovered that the pipes were in bad shape (we had been having water back up from our washing machine from time to time for a few years). They came and replaced an extensive amount of 70 year old cast iron drain pipes for a very reasonable price. After this, we were still having some backup with our washer, and a couple of other minor problems, so the next day they came out and spent a few hours doing additional work AT NO CHARGE to get everything working properly. They have the most customer service oriented policies of any contractor I have ever used. If they do any work without a signed bid, then the work is free. They are a bit more expensive than average, but their guarantees and first class service make them my number 1 choice in San Diego County."

Danton S on August 2019


Avatar for Airmerica Air Conditioning & Heating
Airmerica Air Conditioning & Heating
Based In
5.00(
8
)
Approved Pro
Airmerica Air Conditioning & Heating
Based In
5.00(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
524 local quotes requested

Let Airmerica Air Conditioning & Heating keep your home or business at the perfect temperature with our top-notch HVAC services. As a qualified HVAC contractor in Vista, CA, we have the years of experience needed to provide prompt installation or repair work. We have your HVAC needs covered, from air conditioner installation to heating installation, repair, and maintenance. Our team installs the finest products from YORK® to ensure that your home or business always stays at the right temperature. With our 24-hour emergency services, responsiveness, and flexible schedule, you'll never have to worry about not having heating or cooling! Contact us today to learn more about our services or book an appointment. We look forward to serving you.

"The heating system has been fixed and running."

Kawther H on April 2025

Let Airmerica Air Conditioning & Heating keep your home or business at the perfect temperature with our top-notch HVAC services. As a qualified HVAC contractor in Vista, CA, we have the years of experience needed to provide prompt installation or repair work. We have your HVAC needs covered, from air conditioner installation to heating installation, repair, and maintenance. Our team installs the finest products from YORK® to ensure that your home or business always stays at the right temperature. With our 24-hour emergency services, responsiveness, and flexible schedule, you'll never have to worry about not having heating or cooling! Contact us today to learn more about our services or book an appointment. We look forward to serving you.

"The heating system has been fixed and running."

Kawther H on April 2025


Avatar for On Time Home Services
On Time Home Services
43397 Business Park Dr
4.94(
18
)
Approved Pro
On Time Home Services
43397 Business Park Dr
4.94(
18
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
337 local quotes requested

On Time Home Services is an HVAC company that has been putting our customers first since opening in 2005. We offer expert heating, cooling, and indoor air quality services to homes throughout Temecula and surrounding areas. To make your repair, replacement, installation, or maintenance service as convenient as possible we provide flexible scheduling, same-day appointments, and emergency after-hours and weekend repairs. With free, in-person estimates, friendly and honest customer service, and workmanship that is second to none, you can trust On Time Home Services to be your partner in comfort. Our licensed and insured technicians will go above and beyond to ensure our customers’ complete satisfaction.

"Fantastic service. Ryan and Carlos were very knowledgeable and courteous. Even had same day service. Would recommend to all family and friends! Called on when to expect them so I wasn’t waiting around."

Debbie S on April 2024

On Time Home Services is an HVAC company that has been putting our customers first since opening in 2005. We offer expert heating, cooling, and indoor air quality services to homes throughout Temecula and surrounding areas. To make your repair, replacement, installation, or maintenance service as convenient as possible we provide flexible scheduling, same-day appointments, and emergency after-hours and weekend repairs. With free, in-person estimates, friendly and honest customer service, and workmanship that is second to none, you can trust On Time Home Services to be your partner in comfort. Our licensed and insured technicians will go above and beyond to ensure our customers’ complete satisfaction.

"Fantastic service. Ryan and Carlos were very knowledgeable and courteous. Even had same day service. Would recommend to all family and friends! Called on when to expect them so I wasn’t waiting around."

Debbie S on April 2024


Avatar for G&G Indoor Services Inc
G&G Indoor Services Inc
14781 POMERADO RD
5.00(
16
)
Approved Pro
G&G Indoor Services Inc
14781 POMERADO RD
5.00(
16
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
900 local quotes requested

G&G Indoor Services has been serving the greater San Diego and Palm Springs areas for years using only the well trained and experienced technicians and the best materials and equipment. We are committed to customer satisfaction, a safe and healthy work/living environment, and the best results. As a one stop solution source we offer the full gamut of home air quality services: Attic cleaning, crawl space dry-out, cleaning, sanitization, rodent proofing, and humidity control. We clean, repair, replace and re-rout air ducts, and install air purification systems. We remove and replace insulation in attics, crawl spaces and walls. We install vapor barriers and radiant barriers. We also offer a full range of heating and cooling and energy savings services, including heating and cooling appliances installation, replacement, repair and enhancement, and annual heating and cooling service. We are CDC compliant.

"What a great team! Fast, professional, knowledgeable, and did it at a fair price. I will recommend them to friends."

Doreen M on March 2025

G&G Indoor Services has been serving the greater San Diego and Palm Springs areas for years using only the well trained and experienced technicians and the best materials and equipment. We are committed to customer satisfaction, a safe and healthy work/living environment, and the best results. As a one stop solution source we offer the full gamut of home air quality services: Attic cleaning, crawl space dry-out, cleaning, sanitization, rodent proofing, and humidity control. We clean, repair, replace and re-rout air ducts, and install air purification systems. We remove and replace insulation in attics, crawl spaces and walls. We install vapor barriers and radiant barriers. We also offer a full range of heating and cooling and energy savings services, including heating and cooling appliances installation, replacement, repair and enhancement, and annual heating and cooling service. We are CDC compliant.

"What a great team! Fast, professional, knowledgeable, and did it at a fair price. I will recommend them to friends."

Doreen M on March 2025


Avatar for Same Day Heating, Cooling, Plumbing
Same Day Heating, Cooling, Plumbing
9771 Clairemont Mesa Blvd
4.75(
28
)
Approved Pro
Same Day Heating, Cooling, Plumbing
9771 Clairemont Mesa Blvd
4.75(
28
)
Approved Pro
Customers say: Super punctual
838 local quotes requested
5 years of experience

Family-owned Same Day Heating, Cooling, Plumbing offers fast, reliable AC repair and installation services, heater repair & installation, and now plumbing services, in San Diego County. Our promise to you is always that if we do not fix your system the SAME DAY we arrive… you DON’T pay the service fee. Our home service experts are licensed and insured with more than 100 years of leadership experience. Additionally, we back all of our installation and replacement services with a 24-month, 100% satisfaction guarantee.

"Quick, efficient, affordable, and professional."

Veronica F on September 2024

Family-owned Same Day Heating, Cooling, Plumbing offers fast, reliable AC repair and installation services, heater repair & installation, and now plumbing services, in San Diego County. Our promise to you is always that if we do not fix your system the SAME DAY we arrive… you DON’T pay the service fee. Our home service experts are licensed and insured with more than 100 years of leadership experience. Additionally, we back all of our installation and replacement services with a 24-month, 100% satisfaction guarantee.

"Quick, efficient, affordable, and professional."

Veronica F on September 2024


Avatar for Personal Plumbing, Heating & Cooling
Personal Plumbing, Heating & Cooling
110 Copperwood Way
4.48(
341
)
Approved Pro
Personal Plumbing, Heating & Cooling
110 Copperwood Way
4.48(
341
)
Approved Pro
Customers say: Super punctual
1582 local quotes requested
25 years of experience

We are your local plumbing and hvac experts. We specialize in service and repair while offering a unique approach to your individual plumbing needs. We offer a free in home inspection and registration of all your plumbing fixtures as well as hvac systems to ensure a good working condition. We provide a no hassle repair for future services of these products. Call to set up your free in home consultation today!

"Your guys CJ & Andrew were awesome! They did such a nice clean looking job! Super professional and very informative. They walked me through setting up the app for the whole house water shut off valve they installed and now I get a reduced rate on my homeowners insurance. They also found that my water pressure reducing valve had failed and replaced that at the same time. Couldn’t be more happy with the job they did."

Erick K on April 2024

We are your local plumbing and hvac experts. We specialize in service and repair while offering a unique approach to your individual plumbing needs. We offer a free in home inspection and registration of all your plumbing fixtures as well as hvac systems to ensure a good working condition. We provide a no hassle repair for future services of these products. Call to set up your free in home consultation today!

"Your guys CJ & Andrew were awesome! They did such a nice clean looking job! Super professional and very informative. They walked me through setting up the app for the whole house water shut off valve they installed and now I get a reduced rate on my homeowners insurance. They also found that my water pressure reducing valve had failed and replaced that at the same time. Couldn’t be more happy with the job they did."

Erick K on April 2024


Avatar for Veterans Heating and Air Conditioning, Plumbing, and Electrical
Veterans Heating and Air Conditioning, Plumbing, and Electrical
1110 Morse St
5.00(
6
)
Approved Pro
Veterans Heating and Air Conditioning, Plumbing, and Electrical
1110 Morse St
5.00(
6
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
789 local quotes requested

Veterans Heating and Air Conditioning, Plumbing, and Electrical is a full service home services company in San Diego that delivers exceptional heating and air conditioning, plumbing, and electrical services to the community, and provides opportunities for employment and community building to Veterans. We are 100% Veteran owned.

"Steven, the owner, was very communicative, returning my calls even after business hours to make sure my questions were answered. When an issue arose he, himself arrived the next day to address the issue which was quickly resolved. Time and care was put into the work done."

Sonia B on March 2025

Veterans Heating and Air Conditioning, Plumbing, and Electrical is a full service home services company in San Diego that delivers exceptional heating and air conditioning, plumbing, and electrical services to the community, and provides opportunities for employment and community building to Veterans. We are 100% Veteran owned.

"Steven, the owner, was very communicative, returning my calls even after business hours to make sure my questions were answered. When an issue arose he, himself arrived the next day to address the issue which was quickly resolved. Time and care was put into the work done."

Sonia B on March 2025

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Thermostat installations and replacements FAQs

It's often worth replacing your old thermostat with a newer model that can enhance your home's comfort and energy efficiency. Upgrading to a programmable or smart thermostat can save you up to $200 per year on energy bills. Plus, smart thermostats offer convenient features like remote control and learning capabilities, making your home more comfortable and easier to manage.

Signs of a bad thermostat include your HVAC system not turning on when it's supposed to or failing to reach the desired temperature. If the thermostat's display is blank or not functioning properly, it could be malfunctioning. Another indicator is the HVAC system running continuously without shutting off or cycling on and off too frequently. You might also notice uneven temperatures throughout your home, with some rooms being too warm or too cold. These issues suggest that the thermostat is failing and may need repair or replacement to ensure your HVAC system operates efficiently.

A thermostat should last between 10 to 20 years, depending on its quality and how well it's maintained. Over time, dust, wiring issues, and general wear can affect its performance. Even if a thermostat is still functioning after 10 years, you might choose to replace it to take advantage of newer energy-saving technologies and smart home integrations. Upgrading to a modern thermostat can improve efficiency, offer more control over your home's climate, and potentially lower energy bills.

The number of thermostats you need depends on your home's size, layout, and heating and cooling zones. In a standard single-zone HVAC system, one thermostat controls the temperature for the entire home. However, larger homes or those with multiple floors might benefit from multiple thermostats linked to a multi-zone HVAC system. This setup can offer better comfort and energy efficiency: It lets you customize the temperature in different areas, so you're only heating or cooling the spaces you're using.

Replacing a thermostat typically takes a professional technician about one to two hours to complete. If you're swapping out an existing thermostat for a similar model with compatible wiring, the process can be done in less than an hour. However, installing a new thermostat that requires additional wiring, such as a smart thermostat, or moving the thermostat to a new location can extend the time to two hours or more. Complex installations may also involve cutting into drywall or integrating with other home systems, which can add to the duration.

There are a few things that can cause your home thermostat to fail. The most simple one is age and cleanliness. Dirt, grease, dust, and other small particles can clog sensors and cause malfunctions in readings. You may also have a failing power supply and loose connections, and the simplest cause is that it isn't installed in the right place in your home so it can't properly sense air temperature. Repairing a thermostat costs around $210.

The homeowners guide to thermostat installations and replacements
From average costs to expert advice, get all the answers you need to get your job done.
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