Have you ever wondered what would happen if you simply left your thermostat as is, without changing it for a prolonged period of time? You might assume that nothing much will happen, but unfortunately the reality is quite different. In fact, neglecting to adjust your thermostat regularly can lead to a number of issues that can not only cause discomfort but can also increase your energy bills. In this article, we will explore what happens if you don’t change the thermostat and how you can avoid the negative consequences. So, let’s get started!

1. The Importance of Changing Your Thermostat: Why It Matters

Your thermostat is an essential part of your HVAC system. It allows you to regulate the temperature in your home and ensures that you are comfortable year-round. However, many homeowners neglect to change their thermostats, thinking that it is not essential. This neglect could be costly in the long run.

Regulating Temperature

One of the primary functions of a thermostat is to regulate the temperature in your home. A malfunctioning thermostat will not be able to maintain a constant temperature, thereby affecting your comfort levels. You might end up feeling too hot or too cold, making it hard to relax in your own home. Additionally, if you have family members who have specific temperature needs or health issues, a faulty thermostat could significantly impact their well-being.

Saving Energy and Money

A properly functioning thermostat can help save energy and money. By maintaining a constant, comfortable temperature, you will not have to use as much energy to heat or cool your home. This can translate to lower energy bills, which is always a good thing. On the other hand, a faulty thermostat can cause your HVAC system to work harder than it needs to, leading to increased energy consumption and higher costs.

Ensuring System Longevity

An HVAC system is a significant investment, and you want it to last as long as possible. By changing your thermostat regularly, you are helping to ensure that your HVAC system stays in good condition. A malfunctioning thermostat can put undue strain on your system, leading to damage and the need for costly repairs. Regular replacement of your thermostat can prevent this from happening.

In summary, the thermostat plays an essential role in the performance and efficiency of your HVAC system. Changing it regularly is crucial in maintaining a comfortable living environment, keeping energy bills at bay, and ensuring prolonged system longevity.

2. The Risks of Neglecting Your Thermostat: How It Can Impact Your Comfort

Your thermostat plays a crucial role in regulating the temperature of your home. Ignoring it can lead to a range of unpleasant consequences impacting your comfort.

Firstly, your thermostat may become less accurate over time, depending on its age and usage. This can cause it to misread the temperature in the room, leading to wildly fluctuating temperatures. You may find yourself constantly fiddling with the thermostat, trying to reach a comfortable temperature.

Secondly, there is a risk that your HVAC system will have to work harder than it needs to, leading to increased wear and tear, higher energy bills, and ultimately, decreased efficiency. For example, if you forget to adjust your thermostat when you go to work, your system will continue to run as though you are still at home, wasting energy and resources.

Moreover, if you neglect your thermostat for too long, you could end up causing damage to your HVAC system. For example, if you set your thermostat too low in winter, your pipes could freeze and burst, leading to costly repairs and potential damage to your property.

All of these issues can impact your comfort levels, making your home an uncomfortable place to live. Regularly changing and maintaining your thermostat can help avoid these problems and keep you feeling cozy and comfortable in your home.

3. The Consequences of Ignoring Your Thermostat: Higher Energy Bills and Wasted Resources

Ignoring your thermostat can have significant consequences, including higher energy bills and wasted resources. When your thermostat is not functioning properly or has outdated settings, it can cause your HVAC system to work harder than necessary. This can lead to a significant increase in energy consumption, resulting in higher bills and wasted resources.

An inefficient thermostat can also cause your HVAC system to constantly turn on and off, which can wear down the system over time. This can lead to costly repairs or even a complete system breakdown, requiring a replacement.

Additionally, if your thermostat is not programmed correctly, you may be wasting energy by heating or cooling your home when no one is there. A programmable thermostat can help you save money and energy by adjusting the temperature when you are away.

To avoid these consequences, it’s important to regularly check your thermostat and ensure it is functioning correctly. If you notice any issues with your thermostat or significant changes in your energy bills, it may be time for a replacement or professional inspection. Addressing any issues promptly can help improve the energy efficiency of your home and save you money in the long run.

4. The Damage You Could Be Doing: How Your HVAC System Can Be Affected

Neglecting to change your thermostat can have a negative impact on your HVAC system. When your thermostat is not functioning properly, it can lead to problems with heating and cooling. This can result in damage to the internal components, including the compressor, evaporator coil, and blower motor. The longer you delay changing your thermostat, the worse the damage can become.

If your thermostat is not calibrated, it can cause your HVAC unit to turn on and off more frequently than it should. This constant cycling can put a strain on your system and make it work harder than necessary. This increased workload can cause your system to wear out faster and shorten its lifespan. Not only does this mean you’ll need to replace your system sooner, but it can also lead to costly repairs in the meantime.

Another issue that can arise from neglecting your thermostat is uneven heating and cooling throughout your home. This can lead to hot spots or cold spots, making some rooms uncomfortable to be in. It can also cause your system to work harder to maintain a consistent temperature, leading to unnecessary wear and tear.

In summary, neglecting to change your thermostat can have a detrimental effect on your HVAC system, leading to damage, inefficiency, and discomfort in your home. Make sure to stay on top of thermostat maintenance to avoid these issues.

5. Signs Your Thermostat Needs To Be Changed: When It’s Time To Replace It

If you’ve had the same thermostat for years, it may be time for a replacement. Here are some signs that your thermostat needs to be changed:

1. Inaccurate Temperature Reading: If your thermostat is showing temperatures that do not match the actual temperature in your home, it may be time for a replacement. An inaccurate thermostat can affect the performance of your HVAC system, leading to higher energy bills.

2. Old Age: Just like any other household appliance, a thermostat has a lifespan. If your thermostat is more than ten years old, it may be time for a replacement, even if it still appears to be working properly.

3. Your HVAC System is Not Responding: If your HVAC system is not responding or turning on when it’s supposed to, the problem may lie with the thermostat. You may need to replace the thermostat to restore proper functionality to your HVAC system.

4. No Programming Features: If you have an older thermostat that doesn’t offer programming features, now may be a good time to upgrade. Programmable thermostats can save you money on your energy bills by automatically adjusting the temperature based on pre-set schedules.

5. Obsolete Technology: If you have an outdated thermostat that uses mercury, it may be time for a replacement. Not only is mercury harmful to the environment, but newer thermostats offer better accuracy and control over your HVAC system.

By paying attention to these signs, you can determine when it’s time to replace your thermostat. A new thermostat can improve your home’s comfort and energy efficiency, ultimately saving you money.

6. When To Call For A Professional: When DIY Fixes Won’t Cut It

If you’re experiencing problems with your thermostat even after trying to troubleshoot and fix it on your own, it may be time to call in a professional to take a look. While DIY fixes can sometimes solve the problem, there are certain issues that require the expertise and tools of an HVAC technician.

Common Problems That Require Professional Help

  • Wiring issues: If there are wiring issues with your thermostat, it can prevent it from communicating properly with your HVAC system. This can lead to inadequate heating or cooling, or even damage to your equipment if left unchecked.
  • Compatibility issues: If you’re trying to upgrade to a new thermostat or switch to a different type (such as a programmable thermostat), you may run into compatibility issues with your HVAC system. A professional HVAC technician can help you identify the right thermostat to use and install it correctly.
  • Equipment failure: If your HVAC system is experiencing other problems (such as a malfunctioning furnace or air conditioner), it can impact your thermostat’s performance. A professional can diagnose the problem and make any necessary repairs or replacements.

Why It’s Important To Call a Professional

Trying to fix certain problems on your own can do more harm than good, potentially causing further damage to your HVAC system or even putting your safety at risk. A professional technician has the training and experience to properly diagnose the issue and make the necessary repairs or replacements safely and efficiently.

In addition, if your thermostat is still under warranty, attempting to fix it yourself can void the warranty and cost you more money in the long run. It’s always better to err on the side of caution and call in a professional for any significant thermostat issues.

7. The Benefits of Maintaining Your Thermostat: Improving Your Home’s Efficiency And Comfort Levels


If you want to keep your HVAC system running efficiently, it’s important to maintain your thermostat. Regular upkeep will ensure that it’s able to accurately measure the temperature in your home and communicate with your HVAC system to maintain optimal comfort levels. Here are some of the benefits of maintaining your thermostat:

1. Increased Energy Efficiency

A well-maintained thermostat is one that is clean, calibrated, and operating correctly. This means it will accurately read the temperature in your home and signal your HVAC system to turn on and off as needed. When your thermostat is functioning correctly, it prevents your HVAC system from running unnecessarily and wasting energy. This translates to lower energy costs for you and a reduced carbon footprint.

2. Improved Comfort Levels

A properly functioning thermostat also means that your home will maintain a consistent temperature. When your thermostat is calibrated correctly, it can help keep all areas of your home at a constant temperature, regardless of the outside weather. This results in a more pleasant living environment for you and your family, and can also improve your overall health and well-being.

3. Longer Equipment Life

Maintaining your thermostat can also help extend the life of your HVAC system. When your system doesn’t have to work harder than necessary to maintain the temperature in your home, it doesn’t suffer as much wear and tear. By taking care of your thermostat, you’ll ensure that your HVAC system lasts longer and requires fewer repairs.

In conclusion, maintaining your thermostat isn’t just important for the smooth operation of your HVAC system, it’s also essential for your home’s efficiency and comfort levels. A properly functioning thermostat can improve your energy efficiency, comfort levels, and equipment lifespan, all while reducing your carbon footprint and keeping your home comfortable year-round.

People Also Ask

What happens if you don’t change the thermostat?

If you don’t change the thermostat, it can cause significant problems with your heating and cooling systems. The thermostat won’t work as efficiently, resulting in increased energy bills. It may also cause your heating or cooling system to break down entirely.

How often should you change your thermostat?

You should change your thermostat every few years or as needed. Some thermostats have a battery that needs to be changed, while others need to be replaced entirely. As a general rule, you should replace your thermostat when it starts to show signs of wear and tear, such as inaccurate temperature readings.

Can a bad thermostat cause overheating?

Yes, if your thermostat is not working correctly, it can cause your engine to overheat. The thermostat regulates the temperature of the engine coolant, and if it is not working correctly, the engine can overheat, causing damage and requiring expensive repairs.

What are the signs of a bad thermostat?

The signs of a bad thermostat include fluctuating temperatures, the engine taking a long time to warm up, the radiator hoses not warming up, and the check engine light coming on. You may also notice that your heater or air conditioner is not working correctly.

Why does the thermostat need to be changed?

The thermostat needs to be changed when it starts to show signs of wear and tear, such as inaccurate temperature readings or not functioning correctly. It can impact the efficiency of your heating and cooling system, and if left unaddressed, it may cause significant problems with your HVAC system.


Changing your thermostat is an essential part of maintaining your heating and cooling systems. If you don’t change your thermostat, it can cause problems with your system, leading to increased energy bills and expensive repairs. As a general rule, you should replace your thermostat every few years or as needed to ensure it is functioning correctly and efficiently.