Thermostat is known to carry out a tremendous job in lowering and raising house temperatures during different times of the day. Typically, thermostats use AAA or AA alkaline batteries. Also, you can find some thermostats that use 3V button-style lithium batteries.  As it is the case, you will need to change the thermostat battery once per year or when you get to see a blinking warning signal on the screen. You don’t need a technician to help you on this.  Here is how you do it.

Noting the Model

  • Honeywell sells numerous models that have a specific way of changing battery. You can always find the procedure of changing the battery.
  • Look out the model of thermostat on the instructional guide. Do not begin the process of removing the battery without having an idea of the model of your thermostat.
  • Under these guide we are going to give you step by step approach on how to change a battery in Honeywell 2000 Series, Honeywell 4000 Series, Honeywell 5000 and 6000 Series, and Honeywell 8000 Series.
  • All these models have a different approach of removing battery.
  • Keep your new battery ready and in some models you may need the help of a screw driver.

Changing a Battery in a Honeywell 2000 Series

Under the Honeywell 2000 series you find model numbers such as TH2110D and TH2210D. It is easy to know whether your Honeywell thermostat falls under this category.  This is because these models have a LED screen and push-button.  Battery is there to provide back up when the thermostat is connected to 24-VAC power. You should change the battery after one year. Here is how you should do it.

  • Begin by switching off the system. You don’t want to operate when the system is on this can be catastrophic.
  • Pull the cover plate to disengage it with the wall plate. Be extra cautious when doing this. This is because if you do it carelessly you may end up damaging the cover plate or the wall plate. Do it gently.
  • Once you have removed the cover plate, turn the thermostat over. Spot and remove the two old AA batteries.
  • Replace the old AA batteries with new batteries.
  • Snap back the cover plate back to wall plate and turn the system on.
  • Keep enjoying the incredible job done by thermostat in your house or office.

Changing a Battery in a Honeywell 4000 Series

Under this series, you find H4110D and TH4210D models. Unlike the Honeywell 2000 series, the 4000 series models are specifically programmed and designed to operate cooling and heating system without the need of a heat pump. When the replace bat icon beguns to blink you should know that you have at least two months to replace the battery. You don’t have to wait until the lapse of those two months. Change the battery. The earlier the better. Here is you should do it, under this model.

  • Turn of the system.
  • Remove the thermostat from the wall plate. To do so, pull at the bottom of the thermostat of the face plate.
  • Turn the thermostat over and remove the two AA alkaline batteries and replace them with new ones.
  • Snap the thermostat back to the wall plate.
  • Turn on the system.

Changing a Battery in Honeywell 5000 And 6000 Series

Under Honeywell 5000 series also known as FocusPRO 5000 you find three models; the TH5110D, the TH5320U and the TH5220D. Unlike the TH5110D model that uses AAA alkaline batteries, the TH5320U and the TH5220D uses AA batteries. The Honeywell 6000 series uses AA batteries. However, the process of changing its battery is pretty the same with 5000 series. That’s why we have placed the same under the same category. The battery compartment on both series is found on the side of the battery.  Here is how you do it.

  • Turn of the system.
  • On the top right corner of the thermostat press and pull to open the battery compartment.
  • Be sure that you can see the batteries.
  • Remove the old batteries and replace with new ones.
  • Swing the compartment back. You should have the new batteries ready to minimize the delay time. This is because is the batteries are changed within two minutes you will not have to reset time and date again.

Changing a Battery in a Honeywell 8000 Series

Currently, this is one of the versatile equipment made by the company. Under this series you find models such as the TH8110U, TH8320U and TH8321U.  It can comfortably control three heating system and 2 cooling system at the same time. The three AAA are optional. You only need them if the thermostat is wired directly to AC power. Let’s now get into how you should do to replace the batteries.

  • Gently grasp the thermostat and pull it from the wall plate.
  • Pull out the 3 old batteries and replace them with new ones.
  • Install the thermostat back to the wall plate once again. It is highly recommended that you change the battery after one year.

NB: do not replace the thermostat with batteries that are leaking. This is because it might corrode and end up damaging the electrical components of the equipment.

Tips: Always pay attention to low battery alerts especially the digital thermostats that are capable of displaying a warning sign two or month prior. This gives you ample time to buy and install new batteries.

How do I change the battery in my Honeywell non programmable thermostat?

To change the batteries on a Honeywell thermostat:
  1. Turn the power off at the circuit breakers.
  2. Remove the battery compartment from the baseplate.
  3. Remove the old batteries.
  4. Replace the batteries.
  5. Replace the battery compartment to the baseplate.
  6. Turn the power on at the circuit breakers.

How do you take the cover off a Honeywell thermostat?

How do I get my Honeywell thermostat to work after changing the battery?

Honeywell thermostat not working after battery change – FAQs

First, check if you have installed the batteries the right way. If not, take the batteries out and re-insert them in the correct orientation. Next, try to put a different set of batteries– it could be that your new replacement batteries are not strong enough.

Do all Honeywell thermostats have batteries?

Not all Honeywell thermostats require batteries. But some do, usually the ones with an LED display. All the thermostats that require batteries need 2 or more alkaline AA or AAA types.

Will a Honeywell thermostat work without batteries?

If that thermostat is designed to operate off power supplied by the furnace,it will need no batteries. Honeywell is the name of an equipment manufacturer, not a style of thermostat, and they do make both programmable and non-programmable thermostats.

How do I know if my thermostat needs a new battery?

Tips that it’s time to replace batteries in a thermostat:
  1. Low battery indicator light on your thermostat that may also include a beep from your thermostat unit.
  2. Your air conditioning or furnace isn’t operating quite reliably.
  3. You get a blank screen and can’t set your thermostat or turn your HVAC system on.

Can I replace my thermostat myself?

It is possible to save some money by installing or replacing your thermostat yourself, but you will need: Basic electrical knowledge. A general understanding of the type of equipment being used.

What happens when battery dies in thermostat?

When your thermostat batteries die, you will see a black screen, the thermostat will stop working, and the heating or cooling units will not work. If, after the change of batteries, the thermostat and the heating and cooling systems start working, then everything should be back to working as normal.

How often should you change the batteries in your thermostat?

Know How Often to Replace Them

This warning typically provides one to two months notice before the battery goes fully dead. As a general rule of thumb and to prevent the heating/cooling system from shutting off, you should replace the batteries at least once a year.

Will low batteries affect thermostat?

When low batteries eventually die, you’ll see a black display screen, the thermostat will stop working and your heating or cooling units won’t function. The heating and cooling system cannot respond to nonexistent temperature commands.

How do I change my thermostat battery?

Do I need to change thermostat battery?

When the batteries are nearly depleted, a low battery indicator will appear on your thermostat’s display. Some thermostats feature a light in lieu of an on-display indicator. At this point, your batteries may have another month or two of life remaining, making it a good time to change your batteries.

How do I know if my thermostat battery is bad?

A blank or unlighted screen could indicate a thermostat failure. Check the batteries: Many modern thermostats rely on battery power to operate. If the screen is blank or unlighted, a battery change could solve the problem. Other thermostat malfunctions could also be the result of bad batteries.

How long do batteries last in Honeywell thermostat?

Generally , thermostat batteries last 8-12 months & help retain settings during power outages. Low batteries in digital thermostats are a common cause of issues preventing the heating and cooling system in your home from running.

Do Bryant thermostats have batteries?

thermostat. one bar level with two AA alkaline batteries. They’re in the back of the thermostat, so you’ll have to remove it from the wall.

What would cause a thermostat to stop working?

Look for and address simple reasons why the thermostat isn’t getting power, such as dead batteries or a tripped breaker or blown fuse in your main electrical service panel. If you’re certain it’s receiving power, shut off the thermostat breaker in order to safely take off the cover and examine the inner components.

How do I change the battery in my Bryant thermostat?

Can thermostat work without battery?

If the power fails and the digital thermostat goes out, your energy-saving settings will be lost, unless your thermostat has battery backup. Without that battery backup, many homeowners who experience power outages regularly could get frustrated and stop reprogramming their thermostat.