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Solid Signs That Your Thermostat is Broken

Have you been noticing temperature fluctuations lately? Searching far and wide for reliable thermostat repair? A broken thermostat is one of the most commonly searched topics by homeowners with air conditioners, and rightfully so.

The role of the thermostat in a home is crucial because it allows easy control of the in-house temperatures, regardless of the weather outside. But what are some of the most common bad thermostat symptoms? The first sign that the thermostat is no longer working is a lack of cool air, regardless of how much you try to adjust it. It is important to note that sometimes the problem could be with the AC, not the thermostat, so jotting down these signs is essential to get to the root of the issue.

Learn how to ensure your thermostat is in perfect working condition with our easy-to-follow guide. This guide will help you understand how to test and troubleshoot a potentially broken thermostat. Anticipating problems before they become costlier to fix can pay you in dividends for the long haul. After all, you can keep your HVAC system running optimally for years with the right maintenance.

Our HVAC contractor in Toronto will start by explaining how to determine if your thermostat is malfunctioning as well as. We’ll then provide step-by-step instructions on testing and troubleshooting a thermostat properly. Last but not least, we’ll discuss some common causes of thermostat failure and offer tips for keeping your thermostat working optimally.

Signs of a Bad Thermostat and Common Thermostat Problems

Room temperature not changing

A direct energy thermostat not working despite being turned on is another problem that can quickly get out of hand. It may be hard to notice this if you rarely adjust the unit, but paying attention to the room temperature when the air conditioning unit seems to be working fine can help you identify the issue.

The 15-minute 5-degree test can also be helpful. Reduce the thermostat by 5 degrees and wait 15 minutes. If the air from the vent does not change, expert help will be necessary. Either the thermostat or heating system could be broken.

Not turning on

A thermostat that does not turn on will remain blank or black, but this problem is common with digital thermostats only. A professional inspection of the unit will determine the problem and show whether it can be replaced or repaired.

Difference between the room temperature and thermostat reading

Sometimes the air conditioner and the thermostat could be operating, but the temperature in the room differs from the one on the unit. You can use a room thermometer to show the difference in temperatures.

Although this is usually an indication of a thermostat problem, the change could be because the unit is mounted at the wrong place in the house. For example, if  placed just above the stove, it will read higher temperatures than the actual temperature in the room. On the other hand, if it is too high, the unit will not signal the furnace to turn on.

Causes of thermostat problems


Dirt, dust, and other debris are not good for the thermostat and air conditioner functionality. These elements can interfere with the mechanical aspects of the units, thus causing them to malfunction.

The remedy is  first to determine if they are the actual cause by uncovering the thermostat after turning it off. A small brush, a dry piece of cloth, or compressed air can all be used to clean the unit, but water should never come in contact with the appliances.

Power supply issues

One of the first steps to figuring out how to fix a broken thermostat is determining a sufficient power supply, especially if it is not turning on or communicating with the air conditioner. Some factors to consider include:

Failing batteries: Thermostats use batteries that need to be changed regularly; otherwise, they start to malfunction before the warning pops up. A fresh set of batteries might  be the solution to the problem.

Wiring issue: Another step in how to know if your thermostat is bad is checking the wiring. Corroded, loose, and defective wires can also cause the thermostat to fail. The switches on the AC and thermostat units can also cause the same problem.

Flipped breaker: Only wired thermostats can have this problem because they have a wired electrical panel. Check the panel and flip the one for the thermostat. It should be labelled.

If everything seems to be in place, but the thermostat is still not working as it should call Air Makers. The professionals will do an inspection and determine the root cause of the problem.

Problematic anticipator

Modern thermostat models don’t have anticipators, which means that this problem can only occur in older models. It is a metal tab that is under the unit cover. It has a longer and shorter cycle that is labelled, and you can adjust it accordingly.

This solution may provide reprieve, but it is not permanent. Professional maintenance routines can prevent the problem and provide long-lasting solutions.

Longevity of the thermostat

Every thermostat has a lifespan that, when it nears, it starts exhibiting problems. The average longevity is  ten years, which means that if it has served you for that duration or close, replacing it will be better than repairing.

The Display on the Digital Screen is Faded or Incomplete: What Does This Mean?

If the display on your digital screen is faded or incomplete, it could indicate a malfunctioning thermostat. The digital screen on your thermostat displays critical information about your heating and cooling system, such as the current and desired temperatures. If the information displayed is blurred or incomplete, it could mean a problem with the thermostat.

In most cases, the issue is related to the thermostat’s battery. A low or failing battery can cause the display to fade or become incomplete. Replacing the battery should resolve the issue. If the problem persists, it could be due to a faulty connection.

Steps to knowing if the thermostat is working

The following tips are the answers to the question, “how do I know if my thermostat is broken”? They can help uncover the real problem and provide permanent solutions.

Check if the thermostat is ON and confirm that it is cooling or heating the air as it should. The settings will indicate whether it is supposed to be heating or cooling without any delays in execution, especially if it is a programmable one.

Increasing the temperature gradually and waiting to see a different outcome is another great troubleshooting option. Both the furnace and thermostat should make clicking sounds when it is being adjusted, failure of which indicates that the two are not communicating as they should.

Another sign to look for is how the furnace turns on and off. If it is inconsistent, there could be several reasons, including being dirty or installed in the wrong  location.

Inspecting the breaker and increasing the temperature while professionals are checking out the air conditioner can also help save a lot of money and keep the appliances working perfectly for longer. While checking the breaker, look at the wiring, and report or fix any that seems loose or out of place.

How to Prevent Thermostat Malfunction

In addition to the question of how to fix a broken thermostat, there are also steps that can be taken to prevent it from malfunctioning. Some preventive measures include:

Maintaining consistent temperature settings

Thermostats should be set at the same temperatures during all times and days for optimal performance. This will also help save energy and money.

Vacuuming the vents

Dust, dirt, and debris can clog the vents of air conditioners and thermostats. Regularly vacuuming them can help keep them clear and free from obstructions.

Changing the batteries

Checking and changing the batteries regularly is essential for maintaining a working thermostat. Batteries should be changed at least once a year or more if needed.

Annual maintenance

Having an annual check-up for air conditioners and thermostats can help prevent any potential problems that could arise in the future. A professional technician will evaluate all components of the system and fix any issues that may cause malfunctioning.

Using a surge protector

Surges in power can damage thermostats and other components of air conditioners. Installing a surge protector will help protect the system from any potential dangers.

Following these steps can help ensure that your thermostat remains functioning properly for years to come.

High Energy Bills: Could It Be Your Faulty Thermostat?

A faulty thermostat can cause your energy bills to skyrocket. The thermostat regulates the temperature in your home by communicating with your HVAC system. If it fails to function correctly, your HVAC system can continue to run, even when it is not necessary, leading to increased energy consumption. Older thermostats that use traditional mercury switches are more likely to fail than modern digital thermostats.

Why You Should Consider Upgrading to a Programmable Thermostat

A programmable thermostat, like one from Air Makers, can help you keep your home at the perfect temperature for any time and day. With a programmable thermostat, you can set it to adjust the temperature in your house as needed automatically. This means that no matter how busy life gets or what season it is, you can always be confident that your home will be comfortable and energy-efficient.

Not only that, but programmable thermostats come with additional features such as vacation settings, touch screens, Wi-Fi capabilities and more. All these extra features make them an attractive option for those looking to upgrade their heating and cooling systems.

At Air Makers, we have a wide range of programmable thermostats that are designed to meet your specific needs. We also offer installation and repair services at competitive prices so you can be sure your home is always running at its best. Contact us today to learn more about how our programmable thermostats can help make your life easier and save you money.

How to Tell if Your AC is The Problem

If your thermostat seems to be functioning properly, but the AC still isn’t working as it should, then the issue could lie with the air conditioner itself. Since air conditioners can have many different components and potential problems, there are some common signs to look for that indicate your AC may be the issue.

Strange Noises From Your Unit

First, listen for any strange noises coming from the unit. If it is making odd humming, buzzing, or clicking sounds, then this can indicate a problem.

AC Blowing Warm Air

Additionally, if there’s not enough cool air being produced by the system or if it’s blowing warm air, then this can be a sign of an issue. Make sure to check your thermostat settings and filter first before considering other issues with the unit itself.

Strange Odors

If you notice any strange odors coming from the AC, it could be a sign that something is wrong. An electrical issue, mold buildup, or other problems could cause this.

Short Cycling

Short cycling is when your AC turns on and off rapidly, which can be a sign of an underlying issue. It can also cause the compressor to overwork and eventually break down.

Leaking Around the Unit

Another common issue is when you notice leaking around the unit. This could be caused by a variety of issues, ranging from clogged condensate lines to damaged evaporator coils, and an HVAC technician should be called to address the problem.

AC Freezing Up

Lastly, if the coils of your unit become frozen over or you notice significant ice buildup around the AC, these can indicate a refrigerant leak. If this happens, it’s important to contact an HVAC professional who can diagnose and repair the issue.

If you notice any of these signs, it may be time to call in a professional for an inspection. A qualified technician can find out what’s causing the problem.


If you suspect that your thermostat is not performing as well as it used to, or you’re unsure whether it is the HVAC unit that is damaged, call Air Makers. You will get impressive services that will restore your units to their original efficient state. You can always buy a new thermostat if the current one is exhibiting a lot of problems that are proving to be too costly to fix.


A thermostat is an essential component of any air conditioner, and when it malfunctions, it can cause many problems. Knowing when a thermostat is broken and taking preventive measures can help ensure its longevity.

However, if the thermostat isn’t working as it should and you fail to diagnose the issue, hiring professional help is recommended to guarantee your system’s safety and get it functioning properly again. Are you ready to repair your thermostat once and for all?

It may be best to replace the thermostat if it has stopped working altogether, and a programmable thermostat from Air Makers can help make your home more energy efficient while keeping you and your loved ones comfortable at all times. It can also ensure that your air conditioner runs smoothly for years. We offer installation and repair services at competitive prices so you can be sure that your system is running at its best. Contact us today to learn how our programmable thermostats can help save you money.

Contact Air Makers For Thermostat Installation, Maintenance And Repair

If you suspect that your thermostat is not performing as well as it used to, or you’re unsure whether the HVAC unit is damaged, call Air Makers. You will get impressive services that restore your unit to its original efficiency. You can always buy a new thermostat if the current one exhibits many problems that are proving too costly to fix.

If you have any questions or want additional information about our products and services, contact Air Makers today at [phone]! We look forward to helping you maintain a comfortable and efficient home the way it’s always meant to be.

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