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Thermostat installers and replacers in Selden

QWI ELECTRONICS AND ELECTRICAL APPLICATION
85 Arlignton Ave
4.75(
4
)
Approved Pro
QWI ELECTRONICS AND ELECTRICAL APPLICATION
85 Arlignton Ave
4.75(
4
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

QWI ELECTRONICS AND ELECTRICAL APPLICATION is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations.

"Was not an easy job but Techniction stuck with it for over 10 hours until the job was done that day and I was satisfied. Would recommend particularly for those tech projects that cross over to electric."

Ronald C on October 2024

QWI ELECTRONICS AND ELECTRICAL APPLICATION is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations.

"Was not an easy job but Techniction stuck with it for over 10 hours until the job was done that day and I was satisfied. Would recommend particularly for those tech projects that cross over to electric."

Ronald C on October 2024


Avatar for Mr. Big Plumbing & Heating
Mr. Big Plumbing & Heating
38 Brefni Street
4.88(
13
)
Approved Pro
Mr. Big Plumbing & Heating
38 Brefni Street
4.88(
13
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
3 years of experience

Big Plumbing and Heating, Inc., is your local contractor with over 20 years experience in taking care of all your needs. We do installs and service work for Suffolk and Nassau Counties. Call Today!

"Andre is very knowledgeable about the job. He not only fix the problem but also advise the necessary preventative action."

Victor P on April 2024

Big Plumbing and Heating, Inc., is your local contractor with over 20 years experience in taking care of all your needs. We do installs and service work for Suffolk and Nassau Counties. Call Today!

"Andre is very knowledgeable about the job. He not only fix the problem but also advise the necessary preventative action."

Victor P on April 2024


Avatar for Carlos Home Improvement
Carlos Home Improvement
40 Ponder Lane
New on HomeAdvisorNew on Angi
Approved Pro
Carlos Home Improvement
40 Ponder Lane
New on AngiNew on HomeAdvisor
Approved Pro
15 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.

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.


Avatar for Just Chillin HVACR, LLC
Just Chillin HVACR, LLC
1227 Hyman Ave
4.93(
15
)
Approved Pro
Just Chillin HVACR, LLC
1227 Hyman Ave
4.93(
15
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' 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.

"Not only done right but done more expeditiously than expected"

William W on May 2024

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' 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.

"Not only done right but done more expeditiously than expected"

William W on May 2024


Abreu’s A/C & Refrigeration
38 E Chestnut Street
New on HomeAdvisorNew on Angi
Approved Pro
Abreu’s A/C & Refrigeration
38 E Chestnut Street
New on AngiNew on HomeAdvisor
Approved Pro
5 years of experience

Abreu’s A/C & Heating Company 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.

Abreu’s A/C & Heating Company 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.


Avatar for Pop Audio
Pop Audio
2 Park Lane
5.00(
18
)
Approved Pro
Pop Audio
2 Park Lane
5.00(
18
)
Approved Pro
Customers say: Quality work
10 local quotes requested
2 years of experience

At POP Audio, we believe in keeping things real and straightforward. When it comes to your Residential A/V needs, we've got you covered with a no-nonsense approach. We take the time to understand your unique requirements and budget, ensuring you get the perfect audio and visual setup without any unnecessary frills. We're not about flashy sales pitches; we're about delivering top-notch products and services that fit seamlessly into your home, elevating your entertainment experience. With our reliable solutions, personalized guidance, and genuine passion for A/V, you can trust us to bring your home entertainment dreams to life without the hassle. Choose POP Audio and experience residential A/V done right.

"Pop Video did everything to correct our Nest He is Smart concerned and very responsible! Use him!"

brenda s on March 2025

At POP Audio, we believe in keeping things real and straightforward. When it comes to your Residential A/V needs, we've got you covered with a no-nonsense approach. We take the time to understand your unique requirements and budget, ensuring you get the perfect audio and visual setup without any unnecessary frills. We're not about flashy sales pitches; we're about delivering top-notch products and services that fit seamlessly into your home, elevating your entertainment experience. With our reliable solutions, personalized guidance, and genuine passion for A/V, you can trust us to bring your home entertainment dreams to life without the hassle. Choose POP Audio and experience residential A/V done right.

"Pop Video did everything to correct our Nest He is Smart concerned and very responsible! Use him!"

brenda s on March 2025


Avatar for 1-800-Plumber +Air of Central Long Island
1-800-Plumber +Air of Central Long Island
36 Gazza Boulevard
5.00(
5
)
Approved Pro
1-800-Plumber +Air of Central Long Island
36 Gazza Boulevard
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
109 local quotes requested

1-800-Plumber + Air of Central Long Island is focused on being the BEST! It's not about being better than everyone else, instead our focus is on providing you with the fast, dependable plumbing and emergency services when you need it most. Our goal is to give you the BEST experience you have ever received from a service based business.

"10/10"

Frank J on January 2025

1-800-Plumber + Air of Central Long Island is focused on being the BEST! It's not about being better than everyone else, instead our focus is on providing you with the fast, dependable plumbing and emergency services when you need it most. Our goal is to give you the BEST experience you have ever received from a service based business.

"10/10"

Frank J on January 2025


Sir's Electrical Contracting Corporation
169 Cranford Boulevard
4.91(
151
)
Approved Pro
Sir's Electrical Contracting Corporation
169 Cranford Boulevard
4.91(
151
)
Approved Pro
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
11 local quotes requested

With 45 years of experience Sir's Electric Contracting Corporation is the answer to your small electrical needs or repairs to your electrical system. I Take pride in the high quality expertise that I bring to all of our projects. Your satisfaction is our ultimate goal. Call on us today.

"Anthony was so helpful, knowledgeable, and kind. He hung my light fixture perfectly as well as replaced some switches that weren’t in the original job. I will have him back for any electrical work I need and highly recommend him."

Ellen N on April 2025

With 45 years of experience Sir's Electric Contracting Corporation is the answer to your small electrical needs or repairs to your electrical system. I Take pride in the high quality expertise that I bring to all of our projects. Your satisfaction is our ultimate goal. Call on us today.

"Anthony was so helpful, knowledgeable, and kind. He hung my light fixture perfectly as well as replaced some switches that weren’t in the original job. I will have him back for any electrical work I need and highly recommend him."

Ellen N on April 2025


Avatar for Varsity Home Service Company, Inc.
Varsity Home Service Company, Inc.
1610 Ocean Avenue
4.78(
185
)
Approved Pro
Varsity Home Service Company, Inc.
1610 Ocean Avenue
4.78(
185
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
251 local quotes requested

Practice makes perfect, and Varsity has been at it for over half a century! What began with a Navy veteran’s simple dream — to teach the value of honest, hands-on work to his children — has grown into one of Long Island’s most trusted resource for plumbing, heating and air conditioning services. Varsity’s mission has always been clear: to serve our neighbors with integrity, solve home service challenges with innovative solutions, and provide lasting results. Our dedicated crew is background-checked, rigorously trained in the latest technology, and excited to exceed your expectations. Above all Varsity is here to EARN your trust—not just for today, but for years to come. Let’s tackle your home service needs with the quality and care you deserve!

"Felt back into a corner because I had no choice. And I supplied the, the product And I felt like I got ripped off, spending $632.75 for somebody, being here,35 minutes will never use again."

Lori B on April 2025

Practice makes perfect, and Varsity has been at it for over half a century! What began with a Navy veteran’s simple dream — to teach the value of honest, hands-on work to his children — has grown into one of Long Island’s most trusted resource for plumbing, heating and air conditioning services. Varsity’s mission has always been clear: to serve our neighbors with integrity, solve home service challenges with innovative solutions, and provide lasting results. Our dedicated crew is background-checked, rigorously trained in the latest technology, and excited to exceed your expectations. Above all Varsity is here to EARN your trust—not just for today, but for years to come. Let’s tackle your home service needs with the quality and care you deserve!

"Felt back into a corner because I had no choice. And I supplied the, the product And I felt like I got ripped off, spending $632.75 for somebody, being here,35 minutes will never use again."

Lori B on April 2025


Avatar for The Electrical Wizard
The Electrical Wizard
PO Box 597
4.80(
513
)
Approved Pro
The Electrical Wizard
PO Box 597
4.80(
513
)
Approved Pro
Customers say: True professional
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
19 years of experience

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.

" Very happy with the job, very professional And honest. I would highly recommend this company."

Jackie W on January 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.

" Very happy with the job, very professional And honest. I would highly recommend this company."

Jackie W on January 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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