Fixing a house thermostat usually involves a few quick troubleshooting steps like checking the power, replacing batteries, or resetting the device. If those fail, you might need to clean the internal wiring or replace the unit entirely.
Replacing a thermostat is a project many homeowners can handle, but it's important to know your limits. With safety precautions, the right tools, and a clear set of instructions, you may feel confident tackling the job yourself.
Faulty wiring Loose, corroded, or chewed thermostat wiring can cause your thermostat to stop working, or work intermittently, which can result in incorrect temperature displays. You may be able to identify corroded or loose wiring by taking the faceplate off of the thermostat housing.
Fixing or replacing a home thermostat typically costs between $100 and $300 for the unit and professional installation. Simple repairs (like rewiring) cost $50 to $150, while full replacements with smart thermostats range from $150 to $500 depending on the model.
Whether a thermostat has a reset button depends entirely on its make and model. Many modern smart thermostats (like Nest or Ecobee) have a reset option in their on-screen settings, while some digital models have a recessed button you must press with a paperclip. Other models require a specific button combination, or a battery/circuit breaker flip.
Signs That You Should Reset Your Thermostat
First, check your thermostat for any operational lights and then check your boiler control panel for faults. If you have a boiler fault, check your manual to learn more about what to do. You may have to call a heating engineer. If the thermostat or boiler is non-responsive, then you may have a power issue.
Signs of a bad car thermostat include the engine overheating (stuck closed), slow engine warm-up or poor cabin heat (stuck open), erratic temperature gauge fluctuations, or a check engine light (code P0128). Other indicators are high coolant consumption or leaks around the thermostat housing.
Average Lifespan of a Thermostat
With a straightforward design and basic scheduling features, they are reliable workhorses that can last 10 to 15 years with proper care. Routine programming updates and occasional recalibrations go a long way toward keeping them accurate and extending their usefulness.
Thermostat Replacement starts at $99. To ensure the best service possible, we provide a complimentary 10-point system inspection. This includes: Installation and calibration of your new thermostat.
Many homeowners are curious whether they need an electrician to replace a thermostat or if they can install a home thermostat on their own. While some try the DIY route, professional thermostat installation is usually the smarter, safer choice—especially with the range of high-tech models available today.
One of the most common thermostat-related problems that homeowners run into involves incorrect temperature readings. A thermostat that displays incorrect temperature readings can cause significant heating issues. There are several potential causes of an incorrect temperature reading, starting with improper placement.
To quickly fix a broken thermostat, first verify the device has power by replacing the batteries and resetting the circuit breaker. Next, turn off the power, remove the cover, and tighten any loose wires. Clean away dust, or replace the entire unit if the issue persists.
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.
To test your home thermostat, perform a simple system check: set the temperature a few degrees above (for heat) or below (for cool) the room temperature. Listen for a "click" and wait to see if your HVAC system turns on. If nothing happens, you can troubleshoot the device yourself.
Thermostat problems are often fixable with basic troubleshooting, like checking settings, replacing batteries, inspecting wiring, and resetting the system. Cleaning and calibrating the thermostat can restore accurate performance, especially if dirt buildup or incorrect temperature readings are causing issues.
You likely need a thermostat replacement if your home temperature feels inconsistent, the display screen is unresponsive, or your heating and cooling system cycles on and off frequently. Upgrading is also recommended if you notice sudden spikes in energy bills without a change in usage.
Replacing a home thermostat costs between $115 and $300 on average, including the new unit and professional installation. For a basic, non-programmable model, you might pay as little as $75, while high-end smart thermostats can bring your total to $500+.
How can you tell if a thermostat is bad?
To test a thermostat without removing it, the method depends on whether you are checking a vehicle or a home HVAC unit.
A bad or broken thermostat may make your heating system work overtime. Imagine your heater running non-stop, even when your house feels like a sauna. This happens when the thermostat fails to detect the correct temperature, resulting in the heating system staying on longer than needed.
One of the most common causes of thermostat failure is also the easiest to fix. Batteries are not permanent and need to be regularly changed. If your thermostat is unresponsive, change the batteries and reset the system. This often resolves the problem right away.
To quickly fix a thermostat that isn't communicating with your furnace, first check the batteries and replace them if necessary. Next, ensure the thermostat is set to "Heat" and the target temperature is at least 5 degrees above the current room temperature.
7 Ways to Tell Your Thermostat Is Broken