Cadet Thermostat Troubleshooting [7 Easy Solutions]

The Cadet thermostat troubleshooting guide will help you to fix the following thermostat issues:

  • The thermostat can’t reach the set temperature.
  • The thermostat fails to change temperature.
  • Display showing the wrong temperature.
  • The thermostat not turning on.
  • And thermostat’s short cycling.

So, keep reading and fix your thermostat’s troubles by yourself.

Cadet Thermostat Troubleshooting [7 Easy Solutions]

The digital cadet thermostat allows you to regulate the indoor temperature at your desired level. But sometimes, the following problems may arise. Let’s discuss these problems in detail, including the solutions.

Note: You can also read how to fix Cadet wall heater problems.

1. Fails To Reach The Set Temperature

The most common thermostat problem is that it fails to reach the programmed temperature. When it can’t get the set temperature, it starts malfunctioning. The following factors may cause this issue:

  • One or more damaged or broken sensors
  • Inappropriate thermostat location
  • Dirty equipment
  • Dirt, dust, and other lint particles build up in units inside
  • Damaged wire


Multiple sensors are the thermostat’s working source. Thus, the failure of any sensor ultimately hinders the thermostat from reaching the set temperature. You can solve this issue by following the solutions below:

  • Fix the damaged sensor either by repairing it or replacing it
  • Ensure proper thermostat location so that it can read the room temperature perfectly
  • Clean the unit’s inside and remove the dirt and dust build-up
  • Replace the damaged wires

2. Fails To Change Temperature

Another annoying thermostat issue is that sometimes it fails to change the indoor temperature.

Moreover, thermostats don’t allow you to set the temperature at your desired or chosen level. This issue may happen for the following reasons:

  • Locked thermostat unit
  • The thermostat is in “Auto” mode
  • No power in it
  • The thermostat stops working due to dirt build-up in it
  • Loose wiring


Your thermostat is not letting you change the temperature; it’s irritating. Solve this issue in the following ways:

  • Unlock the thermostat unit by pressing the minus ( – ) and ( + ) keys simultaneously for 3-4 seconds. Then adjust the room temperature again
  • Reset the thermostat
  • Check the damaged battery and change it.
  • Clean the unit’s accumulated grime
  • Tighten the loose wiring

3. The Room Temperature & Thermostat Setting Mismatch

The thermostat settings and room temperature mismatch is another significant problem.

Sometimes, the thermostat fails to match the room’s actual temperature. Thus, it can’t operate well. The common reasons behind this issue are the following:

  • Dirty thermostat
  • Faulty temperature reading system
  • Possible corrosion in older thermostat
  • Incorrectly installed or poor installation
  • Frozen anticipator


The thermostat can’t reach your desired temperature level because of its mismatch with the room temperature. Fix these issues in the following ways:

  • Use a soft brush to properly clean the thermostat and wipe the dirt and debris away
  • Check its reading system and replace it if required
  • Use an electronic contact cleaner to remove the corrosion
  • Install the thermostat in the proper place. Avoid installing it in a cold area, next to a fireplace, or near the floor.

4. HVAC System Stops Working

The thermostat’s functioning and HVAC system are closely related. Sometimes the thermostat’s HVAC system stops working suddenly because of various reasons. The reasons are the following:

  • Thermostat’s dark display
  • Tripped or blown fuse
  • Unresponsive thermostat
  • Grime accumulated inside of it
  • Loose or corroded wiring


If your thermostat’s  HVAC system quits working suddenly, you should go with the following solutions:

  • Check the thermostat’s power issue and replace the damaged battery
  • Replace the tripped breaker or blown fuse
  • Use a soft artist brush to clean and remove the inside’s accumulated grime
  • Tighten the loose wire and replace the corroded wire

5. Short Cycling

Non-stop HVAC operation causes the thermostat’s short cycling. The continuous operation causes energy efficiency erosion.

It’s another thermostat problem that you need to consider. The factors responsible for this issue are the following:

  • Dirty or Off-kilter thermostat
  • Improperly calibrated anticipator
  • Clogged air filter
  • Improper thermostat placement


You can prevent the thermostat’s short cycling issue by following the ways below. The solutions are:

  • Dirt or debris build-up affects the thermostat’s functionality. Thus, clean it properly
  • Ensure the anticipator’s proper calibration
  • Inspect the air filter and remove its clog
  • Proper thermostat placement is essential. Avoid placing it in a cool area, near a fireplace, or on the floor.

6. Thermostat Stops Turning On

Another thermostat problem is that it stops turning on. When it doesn’t turn on, you will see a black screen. The causes responsible for this problem are the following:

  • Thermostat’s dead batteries
  • Defective main power source
  • Malfunctioning circuit breaker
  • Faulty HVAC system


If you see your Cadet thermostat is not turning on, don’t worry, you could solve this problem in the following way:

7. Displaying the Wrong Temperature

Displaying the wrong temperature is another significant thermostat issue. If it shows false heat, you will fail to regulate it properly.

As a result, you will not get a favorable indoor temperature. The most commons reasons behind this issue are the following:

  • Installing a thermostat in an improper location
  • Dirty interior wiring
  • Tighten faceplate connections
  • Displays reappear and disappear frequently


If your Cadet thermostat displays the wrong temperature, first remove its screen’s sticker. The other solutions are the following:

  • Avoid installing the thermostat near the cool area or heat source
  • Turn off the heating system’s power and lose the faceplate’s connection or reinstall it if required
  • Expose the thermostat’s interior and clean it
  • Remove the curtains or furniture near the heater


How do I reset a Cadet heater?

The cadet heater has a manual limit switch. To reset the cadet heater, press the limit switch’s manual. This is the heater’s reset button. The heater can turn off because of blockage, dirt, and malfunctions. Turn it on again.

How do you adjust a baseboard thermostat?

If there is a knob in the baseboard heater, it’s easy to adjust. You can decrease the temperature by rotating the knob counterclockwise or at the lower setting. Again, you can increase the temperature by turning the knob clockwise.

What temperature should baseboards be?

180 degrees is the standard water temperature for the hot water baseboard systems. The water at 180 degrees circulates through the fin tube piping arrangement. And in this way, it creates heat in the room. It returns at 160 degrees.

Should your thermostat be on auto or on?

The thermostat’s “Auto” setting will keep your energy bill low as it saves energy. But if you set the thermostat at “ON,” it will ensure even heat distribution in your house. Thus, it’s better to put it in the “ON” position.

How do I reset my thermostat?

The thermostat resetting method depends on the heater’s model. The general resetting method is to install the backward battery for 5 seconds. Use a paper clip to push the reset button. Or, for 30 seconds, shut off the thermostat breaker.


Now all the thermostat’s problems are clear to you, for which you need the Cadet thermostat troubleshooting guide. We have sorted out all the troubles that are likely to arise and their solutions. 

Hopefully, now you can fix your thermostat issues by yourself. Still, if you have any more queries, let us know in the comment box. We will come to you with the possible solutions ASAP.

About William

William is the founder of He has real life practical skills in fixing smoker & heating appliance issues. He loves to share his knowledge & helps others in fixing their appliances & saving their money. William firmly believes that anyone can repair his or her unit with the correct guidance & knowledge. See more at about us.

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