Yes, you can, but it is highly discouraged because the low-voltage wires carry 24V of power. If your screwdriver accidentally touches the wrong terminals or the bare ends cross, you can easily short-circuit the system, blow the furnace's control board fuse, or damage expensive components.
The first step in how to install a thermostat is making sure the power is turned off to your existing thermostat. Turn off the power for your heating, ventilation and air conditioning (HVAC) system at the main service panel. Its circuit breaker should be clearly labeled.
Bryant systems require specific thermostats based on their equipment type. Standard (non-communicating) units are compatible with most 24V thermostats, while advanced systems require proprietary communicating controls. For the best compatibility, use Bryant’s partnered devices or widely tested third-party alternatives.
For most gas fireplaces, you need a millivolt thermostat. Because these fireplaces are typically self-powered (generating a tiny electrical current via the pilot light's thermocouple), standard 24-volt home thermostats won't work without a special relay.
Yes, you can absolutely change your thermostat! Replacing an old unit with a new programmable or smart model is a highly achievable, beginner-friendly DIY project that can usually be done in under an hour.
You usually do not need an electrician. If you are replacing a standard low-voltage thermostat with a similar model and are comfortable with basic DIY, you can typically do it yourself in under an hour. However, there are a few exceptions where calling a pro is required.
To determine if a thermostat is compatible, remove the current faceplate, take a clear photo of the labeled wiring terminals, and input your wire configuration into a manufacturer tool like the Ecobee Compatibility Checker or Google Nest Compatibility Checker.
The most common problem with a gas fireplace is pilot light failure or ignition issues, often leaving the unit unable to start. This is typically caused by a dirty pilot assembly, dead batteries in the remote/receiver system, or a faulty thermocouple/thermopile.
A plumber isn't usually needed for thermostat replacement unless your thermostat directly controls a water-based heating system, such as underfloor heating or a boiler with complex plumbing connections. Even then, an electrician is typically the right professional to handle the wiring.
A thermostat controls a gas fireplace by monitoring the room temperature and adjusting the fireplace's heat output accordingly. This process typically involves: An IPI (Intermittent Pilot Ignition) module that controls the fireplace's ignition system.
Westinghouse sold its remaining interests in Bryant Electric to Hubbell Incorporated in 1991 with the rebranded Distribution and Controls Business Unit going to Eaton in 1994.
The most common cause of thermostat failure is natural wear and tear from age, which causes mechanical or electronic components to degrade, stick, or lose calibration over time.
No, not all thermostats will work with all furnaces. Compatibility depends primarily on your system's voltage, wiring configuration, and the number of heating and cooling "stages" your system utilizes.
Electricians are your best bet for thermostat replacement, and they charge between $65 and $100 per hour for their labor. In most cases, replacing a thermostat will take 1 to 2 hours, which puts your total labor costs between $65 and $200.
A typical winter furnace cycle lasts 10 to 15 minutes, running 2 to 3 times per hour. On bitterly cold days, run times can extend to 20 minutes or longer. The system should run for a total of roughly 8 to 12 hours over the course of the day.
You should always turn off the power before you connect or disconnect any wires from your Google Nest thermostat, and you should test to make sure that the power is off. This helps protect you and your equipment during installation or troubleshooting.
Average Cost of Thermostat Replacement
Thermostat Replacement starts at $99.
Yes, you can absolutely replace an old thermostat with a new one as a DIY project. However, success depends heavily on your existing wiring. Most standard 24-volt systems (like forced-air gas furnaces and central AC) are highly compatible with modern thermostats, but complex systems require careful planning.
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The average lifespan of a gas fireplace is 15 to 25 years. With regular annual maintenance and moderate use, high-quality models can even exceed 30 years. However, the actual longevity of your unit heavily depends on a few key factors.
People are getting rid of traditional fireplaces primarily because they are terribly inefficient at heating homes, require constant maintenance and hauling of wood, and pose significant indoor air quality and insurance liability concerns.
The "2/10 rule" (often called the 3-2-10 rule) is a crucial building and fire safety standard that dictates how high a fireplace or wood-stove chimney must extend above your roofline to ensure proper draft and prevent smoke from back-drafting into your home.
Most gas fireplaces use a millivolt thermostat, which is a low-voltage system (750mV) that generates its own electricity via a pilot flame. Standard household 24V thermostats are incompatible. You can choose from wired wall-mounts, wireless remotes, or smart integrations.
How To Test Your Thermostat
When your thermostat is set to 73° but reads 78°, it generally means your air conditioner cannot keep up with the heat gain, is restricted by a clogged system, or the thermostat sensor itself is giving a false reading.