A broken thermostat can cause several problems in your HVAC system, including HVAC system breakdown and high electrical bills. Unfortunately, many homeowners fail to read the signs of a bad thermostat. In this article, I’ll tell you about the signs of a bad thermostat and ways to repair it.


4 Signs of a Broken Thermostat

1.      Unresponsive Thermostat

When you change the temperature in your HVAC thermostat, your HVAC should react immediately. You’ll start to notice the change in temperature in your HVAC system. Also, when you turn on your thermostat, you’ll hear a click sound coming from it. This click sound indicates that your HVAC thermostat is working perfectly.

If you don’t hear any clicking sound coming out of your HVAC thermostat or the screen on your HVAC thermostat is blank, you probably have a bad thermostat. However, make sure that your HVAC thermostat’s battery isn’t dead. But if the batteries aren’t dead and your thermostat is still not working, there’s a high chance that your HVAC thermostat is broken and you’ll have to replace it.

2.      Frequent Temperature Change

One of the biggest benefits of using a programmable thermostat is that you can set the temperature according to your schedule and choice. But if you notice that your thermostat is changing temperature frequently and isn’t following the schedule then your HVAC thermostat may be broken. However, if your home is zoned then this temperature fluctuation is alright. But if it isn’t then you’ll have to repair your thermostat.

3.      Your HVAC System Isn’t Turning On

With a functional HVAC thermostat, you’ll be able to turn on your HVAC system. But when you have a bad thermostat, your HVAC system won’t start. It can happen because of the electrical wire problem, or the thermostat itself could be responsible for it. So, how to know whether you have an electrical problem or a bad thermostat.

To identify the root problem, go to your home’s main electric panel where the circuit breaker is and check all the electrical wires of your house connected to your HVAC system. If all the electrical wires are in good condition and your HVAC system is getting power from the circuit breaker then go to your HVAC thermostat. Check the settings of your HVAC thermostat. If you find out that there’s a problem in your HVAC thermostat settings, fix it with the instruction book's help. But if you don’t understand what’s the problem in your HVAC system, call an HVAC professional. HVAC professionals in Dallas are very helpful, and they’ll come to your house and set the thermostat settings to normal.

If your HVAC system still doesn’t turn on after making the changes in the HVAC thermostat settings then you have a broken thermostat. You’ll have to repair your HVAC thermostat to turn on your HVAC system.   

4.      Short Cycling

When an HVAC system turns on and off frequently, it is called short cycling. HVAC short-cycling causes serious damage to your HVAC system. In the beginning, you’ll notice a sharp rise in your heating and cooling bills. After that, your circuit breaker will start tripping frequently, your HVAC system will start to overheat, and so on. Eventually, your HVAC system will breakdown after a few days.

There can be a number of reasons for HVAC short cycling, including bad thermostat problems. When you have a bad thermostat, your HVAC thermostat won’t be able to detect the temperature accurately. As a result, your thermostat will frequently turn on and off your HVAC system. So, if your HVAC system is turning on and off frequently, there’s a high chance that you have a bad thermostat, and you may have to replace your HVAC thermostat.

Now, I’ll tell you how to repair your HVAC thermostat.


See the summary of this content here – 4 Signs of Broken Thermostat [Infographic]

4 Signs of Broken Thermostat

How to Repair Your HVAC Thermostat

In most cases, when you have a bad thermostat, you’ll have to replace it. However, before buying a new HVAC thermostat, you can do some easy troubleshooting, such as cleaning your HVAC thermostat, changing the battery of your thermostat, etc.

To clean the dust from your thermostat, turn off your HVAC system. Then remove the cover of the thermostat and use a brush to clean it. However, as it as an electrical appliance, you shouldn’t use water while cleaning the thermostat.

Again, all the electrical appliances have a certain lifetime, so does your HVAC thermostat. If your HVAC thermostat is more than 10 years old, it has surpassed its lifetime, and you should just replace it with a new one.



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