how to replace battery in Honeywell thermostat

how to replace battery in honeywell thermostat

Thinking how to replace battery in honeywell thermostat?

Replacing batteries in the Honeywell thermostat is not that complicated.

Anyone can replace the batteries with little understating of the thermostats battery unit, battery covers, and which type of cell you should use with your thermostat.

One wrong move, and you will end up breaking the locking mechanics use to hold the battery cover of your thermostat.

If your thermostat blinking “Low Battery” warning or your screen go blank to the point that you can barely see anything on your screen, maybe your air conditioning fan is blowing air.

Still, it’s not heating and cooling as it supposes to, then you need to change the battery.

Find out why your batteries in thermostat keep dying. Fix it now, go through this article for step by step guide.

Be careful before any battery replacement always checks your battery and manufacturer instruction manual before any change to the parts and batteries.

Honeywell Thermostat Model and Battery Type

Honeywell has a wide range of thermostat that uses a battery as a power source to the thermostat.

Different models use a different type of thermostat battery from AA batteries to AAA alkaline batteries.

Here is a simplified version of Honeywell thermostat models with their Batteries type.


You can use Any alkaline or lithium type battery in your thermostat. Alkaline type batteries are suitable for your thermostat as a manufacturer, but lithium batteries are the best as compare to alkaline batteries.

The price of the lithium battery may be more, but the efficiency and reliability are worth the price.

Lithium batteries last longer as compared to alkaline batteries.

The working temperature of lithium batteries is more than alkaline batteries, as lithium batteries can withstand extremely high heat for a more extended period.

And lithium batteries weigh less as compare to alkaline batteries.

If you are not sure about the problem you are facing with your thermostat, you can check out the most common issues in the thermostat, or you can contact the customer support.


Honeywell Thermostat Battery Replacement

Battery placements in Honeywell thermostat are different from model to model.

Some models have battery panel in the front, and some models have it on the back off the faceplate of the thermostat.

Step by step guide to change thermostat battery.

Step 1:- Remove the faceplate of your thermostat by pulling the faceplate out.

Step 2:- Unplug the faceplate from your wall panel carefully.

Step 3:- Remove the battery to replace it with a new battery.

Step 4:- Match the old battery to the new battery for Output and Input voltage value.

Step 5:- Replace the old battery to the new cells.

Step 6:- Be careful with the positive terminal, and the negative terminal of the battery is in line with thermostat terminals.

Step 7:- Plug the faceplate back to the wall panel carefully.


It takes 10-30 seconds to restart the thermostat. Check all your temperature settings and your schedule.

Sometimes battery replacement results in formating your set schedule.

The above steps for battery replacement is an easy task for any person.

If you struggle with any levels above mention, please contact Honeywell’s customer service staff immediately.

Before you carry out any replacement in your Honeywell thermostat, always refer to the manufacturer manual.

If you get tired o replacing the batteries and thinking of upgrading your thermostat, then choose a smart thermostat with remote sensor.


Now you know how to replace battery in honeywell thermostat.

battery replacement is a simple step, but it will save you some bucks. You can do it by yourself or call customer support.

You can follow my step by step guide to replacing the battery very quickly. Always choose the right type of cell for your thermostat.

If your thermostat is damaged and not working i suggest you to upgrade your thermostat with new smart thermostat.


How do you take the cover off a Honeywell thermostat?

Grab the faceplate of your thermostat and pull it towards you. Make sure to hold the thermostat faceplate only. Don’t grab the wall plate; otherwise, your wall plate will come out.

How do you change the battery in a Honeywell touchscreen thermostat?

Hold the thermostat from each side and pull out the faceplate gently. You can access the battery from the backside of your faceplate. Look for the same type of cell and replace it.

Will a Honeywell thermostat work without a battery?

If you are using a thermostat that has a C-wire power input, Yes, the thermostat will work without a battery if you are using only battery-operated thermostat without a C-wire connection. Then you can’t use the thermostat without the charged batteries.

Does a Honeywell thermostat have batteries?

Most of the Honeywell thermostat use battery as an only source for operation or as a backup to its C-wire power source.
It depends on the models you have in your home.

Is there a reset button on a Honeywell thermostat?

A programmable thermostat has a reset button for any quick reset and to schedule any new temperature setting in your thermostat. You can program your thermostat for auto Shut OFF and ON as per your needs.

What happens if my thermostat batteries die?

If your thermostat battery dies, your heating and cooling system will shut off automatically. And it might be possible that your saved schedule will erase automatically. Immediately replace the battery.

How long should thermostat batteries last?

Thermostat battery lasts from six months to two years according to the usage and thermostat function. Problems in thermostat also result in battery drain rapidly.

Leave a Comment

Your email address will not be published. Required fields are marked *