How to Detect a Faulty Thermostat

How to Detect a Faulty Thermostat

A thermostat is the backbone of your home's cooling and heating system. After setting, it triggers, monitors, and regulates the whole climate control process in your house. Without it, you wouldn't be enjoying comfort.

When your system isn't blowing cold air, we assume that the AC is broken most of the time. However, that might not even be a problem and could be the result of a faulty thermostat.

What Signs Show That the Thermostat is Faulty?

A thermostat that has problems portrays several signs that show when it's time for a change. Here are some of the signs to look out for:

  • The thermostat fails to turn on. Such a thermostat won't display anything even after being connected to fresh batteries.
  • It fails to respond when even after adjusting. It may not be turning on the HVAC system or fails to display the changes after you press buttons.
  • The HVAC system fails to turn on. Disconnections in the wiring system mainly cause this.
  • The HVAC system doesn't go off. This can be caused by miscalibrations or the defects in the thermostat's ability to send the message when proper temperatures are attained.
  • The temperature is varying in different rooms of the house. This might be because the reading that the device has doesn't match the actual temperature.

How to Troubleshoot Your Thermostat

1. Ensure your thermostat is set correctly

It sounds obvious, yes, but this is an essential step too. The number of people that leave it in the off mode may surprise you. If it is not set right, the AC or heat will turn up, but it will either cut out before reaching the appropriate temperature or stay on nonstop. Check the mode that the thermostat is set in. If you want the AC to be turned on, set it on 'cool,' and set it on' Heat' if you want to warm it.

2. Check the temperature setting

Check that the temperature is not setting itself. Most people using digital thermostats tend to forget, hitting the 'enter' button after changing the temperature. The best setting if you are home is 72° Fahrenheit and 62° Fahrenheit when no one is around.

3. Check whether the calibration of the thermostat is well placed

The system might be running, but you still feel like the right temperature isn't being reached. This can be due to an issue with the thermostat being wrongly calibrated or placed.

To check the calibration of a thermostat, tape an accurate thermometer next to the thermostat. After ten minutes, check whether the readings are similar on both.

4. If it is electronic, replace the batteries

Batteries of a thermostat are supposed to be replaced annually. They might already be worn out, so you can replace them.

When replacing, you have to first pull at the bottom of it and remove it from the wall plate. Turn it over and replace the two old batteries with new ones. You can now reinstall it back on the wall plate.

5. See to it that wires and connections are firmly connected

Remove the cover and check whether there are any disconnections. Ensure that every connection is firm. To check the wires, you have first to take off their cover. To do so, you must have a screwdriver. Once you have removed the thermostat from the wall, unscrew the top and bottom screws and lift the cover off.

In case you follow all these steps, but there is still no change to your thermostat, contact an HVAC technician who has all the professional ability needed to solve your problem. The team at TDI Air Conditioning will be more than happy to help you.