Your thermostat controls when and how your heating and air conditioning system operates, making proper installation essential for consistent comfort and efficient performance. If your current thermostat is outdated, inaccurate, or no longer responding correctly, professional thermostat installation helps ensure your HVAC system operates as intended and responds accurately to your temperature settings.

At Harris Plumbing, Heating, Air, & Electric, our technicians install conventional, programmable, and smart thermostats for a wide range of residential HVAC systems. We verify compatibility with your equipment, complete all wiring and setup correctly, and test the system to confirm accurate temperature control, reliable communication, and proper heating and cooling operation before the job is complete.

Upgrade your home’s comfort with a professionally installed thermostat from Harris Plumbing, Heating, Air, & Electric. Schedule your thermostat installation today.

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Types Of Thermostats We Install

Choosing the right thermostat depends on your HVAC system, comfort preferences, and the features you want. At Harris Plumbing, Heating, Air, & Electric, our technicians install a variety of residential thermostats and help you select a model that’s compatible with your equipment and designed to deliver reliable, accurate temperature control.

  • Digital Thermostats. A dependable upgrade from older manual models that provides accurate temperature control and simple operation.

  • Programmable Thermostats. Automatically adjust your home’s temperature based on a customized daily or weekly schedule to improve comfort and efficiency.

  • Smart Thermostats. Control your HVAC system remotely, receive energy usage insights, and integrate with many smart home platforms through a compatible mobile app.

  • Wi-Fi Enabled Thermostats. Monitor and adjust your home’s temperature from virtually anywhere using an internet connection.

  • Multi-Stage HVAC Thermostats. Designed for systems with multiple heating and cooling stages to help maintain consistent indoor comfort and efficient operation.

  • Heat Pump Thermostats. Compatible with heat pump systems and equipped to manage heating, cooling, and auxiliary heat functions for reliable year-round performance.

Thermostat Replacement

If your thermostat is outdated, inaccurate, or no longer functioning properly, replacing it can improve system performance and restore reliable temperature control. Our technicians remove the existing thermostat, install the new unit, and verify it’s communicating correctly with your HVAC system.

Smart Thermostat Installation

Upgrade your home with a smart thermostat that offers remote access, programmable schedules, energy usage insights, and smart home integration. We install compatible models, complete the setup, and show you how to use the available features before we leave.

Thermostat Wiring & Compatibility

Not every thermostat works with every HVAC system. Before installation, we verify compatibility with your heating and cooling equipment, complete all necessary wiring, and confirm every function operates as intended.

Thermostat Calibration & System Testing

After installation, we test the thermostat in both heating and cooling modes to verify accurate temperature readings, proper system communication, and reliable operation. We also make any necessary adjustments to help your system respond consistently to your temperature settings.

Signs It’s Time To Replace Your Thermostat

A thermostat doesn’t have to stop working completely before it should be replaced. If your HVAC system struggles to maintain the temperature you set, frequently turns on and off, fails to respond to thermostat adjustments, or the display is blank or unresponsive, the thermostat may no longer be communicating properly with your equipment. Older manual thermostats and aging programmable models can also lose accuracy over time, making it difficult to maintain consistent indoor comfort.

During your thermostat installation, our technicians verify that the issue is truly the thermostat and not another HVAC component. If we identify a problem with your furnace or heat pump, we’ll explain our findings and recommend the appropriate repair before completing the installation.

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Why Homeowners Choose Harris For Thermostat Installation

Installing a thermostat correctly is essential for accurate temperature control and dependable HVAC performance. At Harris Plumbing, Heating, Air, & Electric, our technicians verify system compatibility, complete every installation according to manufacturer specifications, and test your equipment before the job is finished.

  • Experienced HVAC Technicians. We install thermostats for a wide range of residential heating and cooling systems.

  • Proper System Compatibility. We verify your new thermostat is compatible with your HVAC equipment before installation begins.

  • Complete Installation & Testing. Every thermostat is wired, configured, and tested to confirm accurate operation in both heating and cooling modes.

  • Smart Thermostat Expertise. Our technicians install and configure conventional, programmable, Wi-Fi enabled, and smart thermostats.

  • Clear Recommendations. We’ll help you choose a thermostat that fits your equipment, comfort preferences, and desired features without recommending options you don’t need.

Upgrade Your Comfort With A New Thermostat

Take control of your home’s comfort with a professionally installed thermostat from Harris Plumbing, Heating, Air, & Electric. Schedule your thermostat installation today.

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Hear From Our Happy Customers

Great service from Harris Plumbing and Electrical on repair of my electrical panel, Jared Rodriquez and crew were very friendly knowledgeable and professional. They did an excellent job.
I also had Chris B install fire detectors. He was prompt and professional. Harris has been my go to company for my electrical work.
Dedra Stover
23 hours ago
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They are the fastest service company I've ever used. My technician, Andrew, was amazing! Took his time and explained everything! Id recommend for any electrical, heating, air and plumbing. They do it all!
Mary Ann Moebius
1 day ago
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Had Harris out to do an assessment on my heater and the technician Chris found a dangerous situation with my heater exchanger that could have slowly put carbon monoxide into my house. I’m grateful that Lee was able to come to the house right away and provide me selections and options. I was able to get a new HVAC system the next day and my family can safely sleep in our home. Everyone from Mathew and Chris M to Lee and the install guys, Louis, Mike and Jhar were amazing and genuinely great people I would have in my home any time.
Valerie Clay
1 day ago
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He told me things I never knew about plumbing. He gave good estimates.
James Gill
2 days ago
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Tyleek was extremely knowledgeable, professional, and kind. He was prompt and provided useful recommendations to ensure our units continue operating optimally. Anyone who has Tyleek come out to service their units is in good hands
Matt Steen
2 days ago
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Tyleek was amazing today in helping with my furnace tune up. He provided valuable information and choices on what needs to be done and best next steps. 10/10 service.
Jasmine Mosley
2 days ago
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Our technician, Michael was excellent, he was very professional, friendly, and fast. He was able to fix our AC system, and install our new thermostat, he went above and beyond.
Eathan Kempf
2 days ago
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I was quite satisfied with meeting with Josh, yesterday. While I didn't care for the price, I had to expect things would be that high of a cost. Still, Josh's professional conduct while he was inspecting my tank made it that much easier to say, "yes," and go ahead with the installation request. I am not concerned, at this point, about the job itself. The heater installation, earlier this year was very nicely done and the unit is working great.
Lee Bacon
2 days ago
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The technician first of all was polite, he put his booties on. And I appreciate that because I have hardwood floors original. The technician looked at the situation was able to fix the issue and showed me what can be another possible problem if not addressed.
Kevin Highsmith
2 days ago
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Requested same day service in the AM and Scott was at the house by 3:00. He was very knowledgeable and professional, making sure that he understood what I wanted regarding the outdoor outlet and the line to it. He worked quickly and left the patio cleaner than when he arrived. I would highly recommend Harris for electrical work.
Rick Greenwood
3 days ago
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    4.8

    Google Rating

    Based on 1,954+ reviews

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    Our Service Area

    Serving Delaware Statewide With Local Technicians in Your Community

    Harris Plumbing, Heating, Air, & Electric has been serving the communities in Delaware for over 40 Years. Even if you don’t see your county listed, give us a call to find out if we can make it out to your home.
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      New Castle County
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    From routine maintenance to emergency repairs and complete system replacements, Harris Plumbing, Heating, Air, & Electric is here to keep your home safe, comfortable, and running smoothly. Schedule your service today or give our friendly team a call to get started.
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