How to replace battery in honeywell thermostat chronotherm iii

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Investing in a Honeywell thermostat has made my home extremely cozy after a long day of work.

I have also saved up on the power bill as the Honeywell thermostat helps my heating and cooling equipment run more effectively.

Best of all, I had to change the batteries on the thermostat only once a year!

But after changing the battery, I noticed that the thermostat stopped working.

After a lot of confusion and combing through the manuals, I was able to fix my thermostat without calling for professional help.

I will walk you through all the steps you need to do to achieve the same.

We will go through the simple steps you can do to get your thermostat to work after a battery change and then look into more detailed methods such as a factory reset.

To fix the Honeywell thermostat not working after a battery change, ensure that the batteries are the correct type and are properly installed. If the thermostat still doesn’t work, go for a factory reset.

Ensure You’re Using The Correct Type of Batteries

One of the common reasons for the Honeywell thermostat not working after a battery change is that you might have put in the wrong batteries.

The new batteries might not be enough to power your thermostat. 

Check the inside of the battery compartment to know what voltage your batteries need to be. They usually take 1.5V AA ones.

Replace All Batteries In One Go

If you haven’t replaced all the batteries in one go, the thermostat might not work after the battery change.

You should try to avoid mixing up new and old ones. Always do a battery replacement on your Honeywell thermostat with all new batteries.

The differences in charge levels between the old ones and the new ones can cause issues with your thermostat.

Ensure the Batteries Are Correctly Installed

Sometimes, the thermostat won’t work because you might have improperly installed the batteries.

Double-check the battery compartment to ensure that you have installed them in the correct orientation. 

If you see that you have made a mistake, realign the batteries to place them in the required orientation.

The markings inside the battery compartment can help you with orienting the batteries with the correct polarity.

Factory Reset the Thermostat

Factory resetting is a great way for you to fix any persistent problem with your thermostat.

Be warned, though, following through with a Factory reset will take your thermostat back to the default factory settings. 

I will give you a general guide on the steps needed to be taken to factory reset any Honeywell thermostat. Later on, I will talk you through each specific model.

To reset your thermostat, follow these steps:

1. Ensure that your thermostat is turned off
2. Open the door of the battery compartment. Insert a coin or something similar into the slot or by pushing it in and then sliding out the compartment door
3. Now take out the batteries 
4. Put the batteries back on in reverse to the indicated polarity by the markings in the battery holder
5. Allow the batteries to stay this way for about five seconds
6. Next, take out the batteries and reinsert them in the correct alignment
7. The display may now light up, which means it has become working once again

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

To factory reset the Honeywell thermostats of the above models, follow these steps:

1. Check and ensure your device is turned on.
2. Press down on the Menu button for sometime
3. Navigate to the left and select the “Reset” option 
4. Choose factory by clicking “Select.”
5. Click “Yes” when you are asked, “Are you sure?”
6. Your device has now reset

Resetting Honeywell Smart/Lyric Round Thermostat

To reset Honeywell Thermostat model like Smart/Lyric, follow these easy steps:

1. Press down on the Weather button for a few seconds till you see the Menu button
2. Navigate down till you find Factory Reset. Select it
3. Click “Ok” and then “Yes.”
4. Your device has now reset

Contact Honeywell Support

If none of the above fixes work, then you might have to seek professional help.

Contact your local technician or the Honeywell Support staff to get your thermostat fixed.

It might be an issue that is too risky to diagnose without the right equipment and know-how, and the best choice would be to get the professionals in to look at it for you.

Fixing Your Honeywell Thermostat Is Pretty Easy

I have walked you through the steps you can take to make your thermostat work again after a battery change.

Most of them are easy fixes that you can do by yourself. However, if none of those work out for you, you might have to bring in the professionals.

Do not forget to take care when factory resetting your thermostat. You will lose all settings, and you will have to go through the initial setup process again.

For this reason, try to remember what your settings were or note them down somewhere before going for a reset.

You May Also Enjoy Reading

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• Honeywell Thermostat Won’t Turn On Heat: How To Troubleshoot in Seconds

Frequently Asked Questions

Why is my thermostat in delay mode?

A delay mode is used for protecting your HVAC unit. This delay helps in regulating the equipment from restarting too quickly, thus preventing damage to the equipment. The delay mode can last up to 5 minutes.

Why Does My Honeywell thermostat say temporary?

A “temporary” message on your Honeywell thermostat is to let you know that all the scheduled temperature settings are currently on hold.

The current temperature will be the set temperature, which will persist until the hold period is complete or overridden.

After the hold period is over, the temperatures come back on schedule.

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

Honeywell thermostat offers a temporary hold feature that you can use for overriding an existing scheduled temperature.

These are useful when you want to change the schedule during a certain period. The hold can usually last up to 11 hours.

How do you reset a Honeywell Chronotherm 3?