Honeywell Thermostat Not Working After Battery Change (2022)

Honeywell WiFi Thermostat Connection Problems

After a hard day at work, installing a Honeywell thermostat has made my house a cozier place to return to. Using the Honeywell thermostat makes my heating systems equipment function more efficiently, which results in lower utility bills.

Best of everything, I only had to replace the thermostat’s batteries once a year! However, as soon as I swapped out the battery, the thermostat ceased to function. Without contacting for expert assistance, I repaired my thermostat after much uncertainty and poring through the instructions.

I’ll take you to step by step through the process of achieving the same result. We’ll start with the most basic fixes, such as replacing the thermostat’s battery, before moving on to more involved fixes like performing a factory reset.

For Honeywell thermostat problems after a battery replacement, ensure the batteries are of the right kind and placed correctly. Reset the thermostat to its factory settings if the problem persists.

Ensure You’re Using The Correct Type of Batteries

If your Honeywell thermostat still doesn’t function after changing the batteries, you may have the incorrect batteries in there. Your thermostat’s fresh batteries may be insufficient to keep it running. To find out what boost converter your batteries need, go inside the battery compartment. For the most part, they use 1.5V AA batteries.

Replace All Batteries In One Go

If you didn’t replace all of the batteries at once, the thermostat might no longer function properly. It’s best if you keep new and old things apart. Replace your Honeywell thermostat’s batteries at least once every year with brand new ones. Your thermostat may have troubles if the old and new batteries have different charge levels.

Ensure the Batteries Are Correctly Installed

Whether the thermostat does not function, check to see if the batteries are put correctly. Make sure the batteries are put correctly by checking the battery compartment again.

If the thermostat isn’t working, make sure the batteries are installed properly before attempting any fix. Check the battery compartment. One more step is to make sure the cells are properly installed.

Factory Reset the Thermostat

Resetting your thermostat to factory settings is an excellent approach to address any issues you’re having.

Warning: If you do a Factory Reset on your thermostat, you will lose all of your data and have to start again.

I’ll walk you through the process of resetting any Honeywell thermostat to its factory default settings. Later on, I’ll go through each of the models in detail with you.

Follow these steps to reset your thermostat:

  • Turn off the thermostat if necessary.
  • Unlock the battery compartment’s door. Place a penny or other small object in the slot and then slide the compartment door to release it.
  • Now, remove the batteries from the device.
  • Replacing the batteries is as simple as reversing the polarity of the battery holders’ markings.
  • The batteries should remain in this position for about five seconds.
  • Next, remove the batteries and reinstall them according to the manufacturer’s instructions.
  • The screen may now be lit, indicating that it is operating properly once again.
How To Reset Honeywell Thermostat

How to Factory Reset Honeywell T5+, T5, and T6 

Follow these procedures to restore the factory settings on the Honeywell thermostats listed above:

  • Check to see whether your gadget is on and ready to use.
  • Hold down the Menu button for a few seconds to bring up the menu
  • Select “Reset” from the menu on the left.
  • Click “Select” to select a factory.
  • When prompted, click “Are you sure?” and then click “Yes.”
  • As a result, your device has now been completely reset.

Resetting Honeywell Smart/Lyric Round Thermostat

Follow these simple steps to reset a Honeywell Thermostats model like the Smart/Lyric:

  • Press and hold the Weather button until you see the Navigation button appear on the screen.
  • Please make your way to Factory Reset by scrolling down till you see it. Decide on it
  • Once you’ve done that, click “Ok” and “Yes.”
  • The device you’re using has now been reset.

Contact Honeywell Support

If none of the suggestions above help, you may need to seek professional guidance. To repair your thermostat, speak with a local professional or perhaps the Honeywell Support team.

It’s possible that diagnosing the problem is too unsafe without the proper equipment and expertise, therefore hiring specialists is the best option.

Fixing Your Honeywell Thermostat is Pretty Easy

I’ve shown you how to get your thermostat working again after changing the batteries. Most of them have been do-it-yourself projects. You may have to hire specialists if none of these options work out for you.

When you reset your thermostat to the manufacturer’s settings, remember to be cautious. All your settings will be wiped clean, and you’ll have to start from scratch. As a result, before doing a reset, make an effort to recall or write down your previous settings.

Best Seller List of Honeywell Thermostats:

SaleBestseller No. 1
Honeywell Home Wi-Fi 7-Day Programmable Thermostat (RTH6580WF), Requires C Wire, Works with Alexa
  • ENERGY STAR certified. Help save energy, track your heating and cooling with monthly energy reports and get personalized tips on reducing energy use.
  • C-WIRE POWER ADAPTER REQUIRED: Before purchasing, check to see if this thermostat is compatible with your home and to determine if your home needs a C-wire power adapter.
  • SMART HOME INTEGRATION. The Wi-Fi 7-Day is compatible with voice assistant devices like Amazon Alexa, Google Assistant, Microsoft Cortana, and more.
  • THERMOSTAT THAT FITS YOUR LIFE. 7-day, 4 periods per day, flexible programming lets you sync your comfort with your schedule.
  • EASY OPERATION AND INTUITIVE. Big, backlit digital display and easy controls make for a user-friendly experience.
SaleBestseller No. 2
Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy...
  • COMFORT COMES IN YOUR COLOR. Personalize your Wi-Fi Smart Color Programmable Thermostat to fit your décor.
  • YOUR SCHEDULE. YOUR WAY. Flexible programming options for your schedule or utility company’s peak rate pricing.
  • EASY OPERATION AND INTUITIVE. Bright, easy-to-read touchscreen makes for simple operation.
  • COMPATIBLE WITH: Forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup. Does NOT work with electric baseboard heat (120-240V). C-Wire required.
  • ENERGY STAR certified. Help save energy, track your heating and cooling with monthly energy reports and get personalized tips on reducing energy use.
SaleBestseller No. 3
ecobee EB-STATe3L-01 3 Lite Thermostat, Wi-Fi, Works with Amazon Alexa
  • This refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, and may arrive in a generic box
SaleBestseller No. 4
Honeywell Home RTH7600D 7-Day Programmable Touchscreen Thermostat
  • Large touchscreen display makes it easy to set your preferred temperature or set a weekly schedule for automated adjustments.
  • Set home and away temperatures to help save energy when you're not home. Temporary and permanent hold settings are also available for extended absences from home.
  • 7-Day menu-driven programming with 4 periods per day.
  • Backlit touchscreen display shows current room temperature and set point temperature simultaneously.
  • Simple and straight forward to install and use. The thermostat also has a real-time clock so it will automatically adjust for Daylight Savings Time.
SaleBestseller No. 5
Honeywell TH9320WF5003 Wi-Fi 9000 Color Touch Screen Programmable Thermostat, 3.5 x 4.5 Inch, White,...
  • Made in United States
  • Package length : 6.0"
  • Package width : 2.0"
  • Package height : 8.0"
  • Material Type: Plastic



1. Why is my thermostat in delay mode?

To keep your HVAC system safe, turn on the delay mode. To prevent the equipment from resuming too rapidly, this delay is used. The delay mode has a maximum duration of five minutes.

2. Why Does My Honeywell thermostat say temporary?

If your Honeywell thermostat displays a “temporary” notice, it means that all of your planned temperature settings are presently on pause while you wait for the problem to be resolved.

As long as the hold period is active or overridden, the current value will also be the set temperature. The temperatures will return to normal when the hold period has ended.

3. How long does a temporary hold last on a Honeywell thermostat?

You may temporarily override a preset temperature on a Honeywell thermostat by using the temporary hold option. Useful if you need to alter your schedule for a particular length of time. There is normally an 11-hour hold-time limit.

-our editorial board has reviewed this article and has been approved for publication according to our editorial policy.

Last update on 2022-08-11


Electronic devices are like an addiction to me. Years ago, I started my job at an audio/video installation co. Then I realized that I have a passion for home theaters. It is a perfect scope to share my different experiences about electronics and home theaters.

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