Honeywell Thermostat Heat Not Working On Auto

Honeywell thermostat is a great smart device that helps to bring comfort and convenience in your home. Being a popular brand, Honeywell is well known to produce high quality smart home devices. Therefore, their thermostats give the most promising results in terms of reliability and energy efficiency.

Basically, this device is meant to help you control your house or room temperature for comfort and convenience. What’s amazing is that the device is inscribed with an auto feature that helps to control and maintain the temperature of a specific room.

Although the best, it’s possible to experience some drawbacks with Honeywell thermostat. From failing to turn on the AC, you are likely to experience a number of hiccups. Another common problem experienced by users is Honeywell thermostat heat not working on auto. Since this can cause panic among users, we decided to compile a detailed guide on why your smart home device heat is not working on auto and how to fix.

Why Is My Honeywell Thermostat Heat Not Working On Auto

If your Honeywell thermostat is not able to heat on auto mode, there are a myriad of causes. In most cases, your thermostat could be having power issues, perhaps your battery is running low or there is a loose connection. Let’s take a look at the most common causes of this problem.

  1. Setting problems: At times, you may think you correctly enabled your smart home device’s auto mode but in real sense you dint. Therefore, if your auto mode is disabled, your Honeywell thermostat will not heat on auto.
  2. Low battery: If your battery is dying or running out of power, it will hinder your Honeywell thermostat from heating on auto mode. If so, this will need you to change the battery or charge it.
  3. Corrupted data: Data problems can prevent your Honeywell thermostat heat from working on auto mode. In fact, corrupted data impacts your device’s firmware preventing it from using any other feature offered.
  4. Device overheating: More often than not, your device’s cooling system or blower can fail to turn on automatically due to some problems. As a result, your device will overheat and stop the heating on auto mode.
  5. Wiring issues: Lose connection or wiring problems can also hinder your Honeywell thermostat from heating on auto mode. In fact, wiring issues does not only cause problems with auto features but the overall device functionality.
  6. Sensor problem: If the above problems are sorted but still your Honeywell thermostat heat is not working on auto, there is a possible problem with the sensor. If the sensor has problems and not working well, it won’t relay the correct temperature. 

Honeywell Thermostat Heat Not Working On Auto And How To Fix

Now that you are aware of possible causes of your Honeywell thermostat heat not working on auto, time is ripe to fix it. Note that some problems may require an HVAC expert to conduct a professional check on the entire system. Better still, you might be prompted to replace your entire unit. However, fret not! This is because some problems are minor and simple to fix. In this article, we take you step by step on how to fix your Honeywell thermostat heat not working on auto.

1) Rewire your device

As mentioned, it’s possible that your Honeywell thermostat heat is not working on auto due to loose connection. To fix this, flip off your device’s power and look at its wiring. Unplug all the cables and rewire them to their right places. The good thing is that Honeywell thermostat terminals are well labelled and identified for easy connection.

For instance, the terminal labeled RC is the cooling system switch, RH is the heating system switch, and W is used for controlling heat, Y for controlling cooling and compressor while G helps to control the fan. 

To rewire, take a needle-nose pliers and straighten the wires before connecting them. Tightly connect one end of the cable to the thermostat and another to the wall terminal. Make sure to connect the wires to the thermostat with matching color codes.

2) Clean your system

Accumulation of dust and dirt on the fan blades or clogged filter can hinder the HVAC furnace from heating your room. Therefore, you can fix this by cleaning the fan blade, motor housing and blower assembly among other parts.

3) Program your device

This can also help to fix your Honeywell thermostat heat not working on auto. Programming your device correctly is setting it to work on heating mode at a specific time of the day. By doing this, your heat auto feature will work as intended. To program, 

  • Open your device’s settings
  • Open the auto menu and select “day configuration”
  • Set your specific time interval of that day and choose “ heating”
  • This will enable your device to automatically allow heating mode within your selected timing.

4) Reset your device

If other remedies failed, resetting your device can also help to troubleshoot Honeywell thermostat heat not working on auto. Although resetting your device can help, have in mind that the process will erase all the programmed routine. This will require you to re-enable all erased features for effectiveness. Note that resetting your Honeywell thermostat depends with its model. In our page here, we have outlined ways of resetting different models of Honeywell thermostat. Check out and reset your device. Once you are done, conduct a test to determine whether the problem has been fixed.

Final Say

Is your Honeywell thermostat heat not working on auto? There might be a number of causes as explained above. This can be loose wires, low battery or faulty blower. If so, try to fix these issues through our troubleshooting tips above. If none of the remedies work out, your thermostat might be faulty and need a replacement. Although painful and hard to accept, your Honeywell thermostat heat not working on auto might be an indication that it’s time to replace the device. Therefore, get a newer model of Honeywell thermostats and continue enjoying its fantastic features.

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