Thermostat

A thermostat is the control center for your home's heating and cooling system, letting you set comfortable temperatures and manage energy costs. Whether you're upgrading to a smart model, troubleshooting inconsistent readings, or need help with installation, understanding your options makes all the difference. Angi connects you with pros who handle thermostat services and provides guides to help you make informed decisions.

Related to Thermostat Service

Thermostat Service Articles and Advice
Paige Bennett  •  Apr 10, 2026
How Does a Thermostat Work to Keep Your Home Comfortable?
Summer sun or winter snow, a thermostat keeps your home comfortable year-round. But how does a thermostat work? Read this guide to learn more.
Paige Bennett  •  Apr 10, 2026
How Long Do Thermostats Last? Is It Time for a New One, Stat?
Have you ever wondered how long thermostats last and whether it’s time to replace yours? Review this guide to find out if you need a replacement.
Audrey Bruno  •  Apr 10, 2026
How to Read a Thermostat: A Complete Guide
Reading a thermostat may seem easy, but it’s essential to maintaining the temperature of your home. Learn more about each thermostat setting.
Paige Bennett  •  Apr 10, 2026
What Is a Smart Thermostat, and Is It Smart Enough for Your Home?
What is a smart thermostat, and should you install one in your home? Find out whether this handy tech is right for your household with this guide.
Jenna Jonaitis  •  Apr 10, 2026
What Temperature to Set Your Thermostat to When on Vacation in Winter to Save on Heating Bills
Save on your heating costs while you’re away from home by learning the best temperature to set your thermostat when on vacation in the winter.
Emma Diehl  •  Apr 10, 2026
What Is the C-Wire on a Thermostat? Everything You Should Know Before Installation or Repairs
What is the C-wire? This important wire can connect a smart thermostat to your HVAC system for power and WiFi. Learn all you need to know here.
Paige Bennett  •  Apr 10, 2026
7 Symptoms of a Bad Thermostat
Having issues with your HVAC system? A faulty thermostat could be to blame. Blank screens, temperature discrepancies, and a lack of responsiveness can all mean your thermostat has gone bad. Find out the major symptoms of a bad thermostat here.
Taylor Freitas  •  Apr 10, 2026
Discover 3 Different Types of Thermostats and Pick the Right One for Your Home
Not sure which kind of thermostat is best for your home? Here’s an overview of three types of thermostats so that you can choose the right one for you.
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Common Thermostat Service Questions

Yes, depending on the type of thermostat you buy. Both smart and programmable thermostats make it easy to adjust your home's temperature so you're not blasting the heat or air conditioning when you don't need it. 

While these thermostat types cost more upfront than manual and non-programmable thermostats, they can save you as much as $180 per year on your energy bills. 

Additionally, some states, like California and Florida, have pilot programs that allow smart thermostats to receive wireless signals from utility companies. These signals allow the thermostat to adjust the temperature according to the price of electricity at various times per day, which can make the long-term savings of smart thermostats worth the initial cost.

No, not all thermostats require a C-wire. Older manual and programmable thermostats typically do not need one. While many smart thermostats do require a C-wire to function correctly, some models can operate without one, often at the expense of certain features. A C-wire provides a constant source of power, which enables the thermostat to stay connected to Wi-Fi and keep its display screen lit on-demand. If you are upgrading from an older thermostat to a smart model that requires a C-wire, you may need to install one first for it to work as intended.

Yes, HVAC zoning is generally considered worth the investment by both experts and homeowners. Zoned systems offer significant benefits in convenience, efficiency, and comfort by allowing you to set different temperatures for various rooms or 'zones' in your house. This ability to heat and cool only the spaces you're using leads to energy savings and lower utility bills. Zoned systems are especially effective in multi-level homes that experience temperature fluctuations, but even smaller homes can benefit from the ability to adjust temperatures more quickly. While the up-front installation cost can be high, many find it's a worthwhile long-term investment, particularly for those who plan to stay in their home for a while.

The first indicator that your thermostat is malfunctioning is if it just doesn't turn on at all. If the AC, heating, or fan functions won't turn on or off no matter how often you try through the device or app, that's also an indicator that the culprit for your cooling problems is the thermostat. If the thermostat forgets the settings you programmed or the display doesn't match the real temperature in the room, those are signs that the thermostat is broken.

There are many reasons a thermostat might go on the fritz, including faulty wiring, a dead battery, an error in programming the settings, or even a buildup of dirt in the physical thermostat itself. Fortunately, it’s relatively easy to troubleshoot many common thermostat issues yourself, so you can get back to the easy-to-set, even indoor climate control you’re used to.