Honeywell programmable thermostat battery replacement

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Get free shipping on qualified Low Battery Indicator, Honeywell Thermostats products or Buy Online Pick Up in Store today in the Heating, Venting & Cooling Department. ... T4 PRO 5-Day to 2-Day Programmable Thermostat 1/Heat 1/Cool - (2-Pack) Add to Cart. Compare $ 174. 59 (2605)Smart Response Learning. The T6 Pro 7-Day Programmable Thermostat learns your heating and cooling cycle times to deliver the right temperature when you want it. With precise temperature control, the thermostat can automatically change from heating to cooling to help maintain the temperature you like most. Intuitive Design.POPULAR VIDEOS. How to Install A Honeywell Home T3, T4, T5, T6, and T9 Thermostat (Video) Modal 1. How to set up your Honeywell Home T5 or T6 Pro Thermostat. Modal 1. How to program schedules on the T6 Pro thermostat. Modal 1. How to enter and navigate advanced programming on the T6 Pro thermostat. Modal 1.How to Fix a Honeywell Thermostat that Stops Working After Battery Change. To get your Honeywell thermostat to work again after changing the batteries, here is how to go about it: 1. Check that You're Using the Required Batteries. Honeywell thermostats use regular AA/AAA alkaline batteries (non-rechargeable batteries).Find a pro. T5 SMART THERMOSTAT. $99.99. $99.99. (45) More options available. Add to cart. Shop WiFi Thermostats to help manage energy costs while maintaining ideal indoor temperature with smart home products like the Honeywell Home T9 Smart Thermostat.WiFi Smart Thermostat Manual & Support. RTH9580WF1005/U1. Download Manual Download Installation Guide. Download Service Datasheet. WiFi Smart Thermostat Product Page.

About This Product. Keep your home at just the right temperature with the Honeywell Home 7-Day Programmable Touchscreen Thermostat. Choose battery-powered or hard-wired operation. Your settings stay safe with the permanent day and time backup. The advanced design provides maximum comfort by sensing whether your home needs heating or cooling.Jul 28, 2022 ... Subscribe. Honeywell Thermostat AA Battery Replacement. 30. Dislike. 3. Share.Take It All With You. Gain further control over your home from anywhere, anytime when you access the WiFi Smart Color Thermostat through the Total Connect Comfort App. Monitor and adjust heating and cooling usage, stay on top of indoor humidity levels, even automatically receive email alerts related to safety, comfort and energy.A 5-1-1 thermostat features five day programming for Monday to Friday. You'll also be able to program Saturday and Sunday to meet your schedule. A 5-2 thermostat is the same, but with the weekend being lumped together instead of individually. A 7 day programmable thermostat allows for absolute customization. You'll be able to program each day ...Page 19: Battery Replacement RTH2310 Programmable Thermostat Battery replacement Set the System switch to Off before removing the batteries. Otherwise, the heating/cooling system might remain activated even when batteries are removed. Install two fresh AA batteries when the low-battery icon flashes on the screen.2 Thermostat Controls. 3 Programmable Thermostat. 4 To Adjust Program Schedules. 5 Adjusting Keypad Lockout. 6 Battery Replacement. 7 Troubleshooting. Download this manual. See also: Instruction and Installation Manual. T6 Pro.

The simplicity of the Honeywell Home PRO 2000 vertical thermostat from Resideo makes it an easy upgrade from basic up-down temperature controls without committing to a WiFi-connected thermostat. The PRO 2000 vertical thermostat has a large, backlit screen that is easy-to-read and features a real-time clock, with simple push-button controls.Your old Apple Watch will probably still get the job done, if you give it the juice. Apple Watches are impressive little computers, but they don’t last forever. After enough time, ...Here are the steps to calibrate your thermostat: Take out the battery compartment from your Honeywell thermostat. Insert 1st pair of batteries inside the thermostat and wait for 10-15 seconds. Now, take out the batteries again and put them in reverse polarity. Put the battery compartment inside the thermostat and wait for 10-15 seconds.Once you have identified the model of your Honeywell thermostat, you can proceed to purchase the correct replacement battery. The most common types of batteries required for the Honeywell thermostat are AA alkaline batteries, but some models may require AAA or lithium-ion batteries.Carefully read the user manual or online specifications to determine which type of battery is recommended for ...

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Battery Replacement In Honeywell Thermostats: All Models Guide | Water Heater Hub. Note: This post may contain affiliate links. This means that at no cost to you, we may …If you own a Honeywell Pro Series thermostat, it’s essential to familiarize yourself with the user manual. The Honeywell Pro Series manual is a comprehensive guide that provides de...Replace the battery: Remove the old battery and replace it with a new one. Be sure to follow the manufacturer’s instructions for inserting the battery correctly. Reattach the thermostat cover: Once the new battery is inserted, snap the thermostat cover back into place. Turn the power back on: Finally, turn the power back on to the thermostat ...The 5-1-1 Day Programmable Thermostat is designed to provide the perfect combination of comfort and function. Its large backlit display simultaneously shows the current room temperature and your set point temperature. User-friendly controls and change reminders for filters and batteries are built in for a complete solution.

Honeywell Home RTH221B1021 Programmable Thermostat, 1 Week / 4 Time Periods Per Day, ... This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. You may receive a partial or no refund on used, damaged or materially different returns. ... Average Battery Life ‎8760 Hours : Warranty ...BATTERY REPLACEMENT. An icon appears when the batteries must be replaced. The icon remains on the display for 60 days. Afterwards, the thermostat will cut power to the heating system. The time and programming are saved for the first 15 seconds when the batteries are removed. SPECIFICATIONS. Max. resistive load: 5 A @ 24 VDC / 120 …TH6220D1002/U - Upgraded Replacement for Honeywell FocusPro 6000 Programmable 2H/2C Thermostat ... Honeywell TH5110D1006/U Non-Programmable Thermostat, Premier White. dummy. ... Battery Powered. Battery Powered. Battery Powered. specification met ...REPLACE BATTERY warning begins flashing. The ... *Use to cover marks left by old thermostats. Operating Manual 69-1923EFS—01 14 ENGLISH 5-year limited warranty ... Honeywell shall repair or replace it (at Honeywell's option). If the product is defective, (i) return it, with a bill of sale or other dated proof of purchase, to the place from ...The Round Non-Programmable Thermostat has a classic design and offers single-stage, non-programmable temperature control for 24V systems. This model has been a Honeywell Home staple for years and has an easy-to-read display, while the temperature reading is easily seen from a distance. Moreover, the on-demand backlighting makes it easy to read ...Each different Honeywell model will have a slightly different factory reset method, however, as a general rule most thermostats will be reset to factory settings by taking the following action: Switch off the power and remove the thermostat battery. Replace the thermostat battery but in reverse polarity. SKU: RTH2510B1018/E1. 2.0. |. 38 Reviews. 8 out of 35 (23%) reviewers recommend this product. Write a Review. Single-stage Programmable Thermostat. SELECT A MODEL: 7-Day Programmable Thermostat. Shop programmable thermostats to help manage energy costs and maintain comfort. Set a daily heating/cooling schedule with thermostats such as the T5 7-Day Programmable Thermostat for low-maintenance control of your home's temperature. Shop online or contact a pro for installation. Home. Shop All Products. Air.Installation Guide for TH4110B Programmable Thermostat (Spanish) - Legacy Product Document View Resource: Installation Guide for TH4110B Programmable Thermostat (Spanish) - Legacy Product Document PRO 4000 Series Programmable Digital Thermostat Installation Instructions (English, French, Spanish) - Legacy Product Document SKU: RTH2510B1018/E1. 2.0. |. 38 Reviews. 8 out of 35 (23%) reviewers recommend this product. Write a Review. Single-stage Programmable Thermostat. SELECT A MODEL: 7-Day Programmable Thermostat. The T4 Pro Programmable Thermostat is easy to install, with on screen menus to display installation steps and a universal mounting system. ... Auto Changeover, Battery Back-Up, Daylight Savings Time Ready, Filter Indicator, Low Battery Indicator, Touch Screen. ... Can this T4 replace Honeywell model TH8321WE1001? Thank you. by AnnD | Jan 23 ...The TH83201008 thermostats provide temperature control for gas, oil, electric and heat pumps for up to 3 stage heat, 2 stage cool systems, including dual fuel operation. Features: Large, clear display with backlighting shows the current and set temperatures and time - even in the dark. Menu driven programming makes set up effortless.

Honeywell Home RTH221B 1 Week Programmable Thermostat. Video. Availability: In Stock. Price: $31.95 $44.95. You Save: $13.00 (28% Off) - 1 Customer Review. Add to Cart. Simply Programming - one program for the entire week, up to 4 periods per day. Set desired temps for 4 periods - wake, leave, return, and sleep.

Changing the battery on your Honeywell Thermostat is a relatively straightforward process. Here are the steps you should take: Step #1: Turn off the power to your thermostat by either disconnecting the power source or shutting off the breaker in your circuit box. Step #2: Carefully remove the cover of your thermostat by pressing in the …The Honeywell Home Horizontal Digital Non-Programmable Thermostat provides simple control over your heating and cooling system. Simply set your preferred temperature on an easily accessible and user-friendly interface. Advanced temperature monitoring minimizes temperature swings and ensures absolute comfort. In the event of a power outage, the RTH111B will also remember your previous ...yourhome.honeywell.com RTH2300/RTH221 Series Programmable Thermostat Identify System Type This thermostat is compatible with the following systems: • Gas, oil or electric furnace • Central air conditioner • Hot water system with or without pump • Millivolt system • Central heating and cooling system • Heat pump without auxiliary ...Product Description. "HONEYWELL" DIGITAL THERMOSTAT Digital Heat/Cool Thermostat 5/2 Programming With 4 Periods Per Day, For Use With Central Gas,Oil, Or Electric Furnaces & Air Conditioning For Single Stage Heating & Cooling Or Milli Volt Systems Large,Easy To Read Display Program memory in the event of power outage Precise temperature control ...Honeywell TH5110D1022 FocusPRO 5000 Digital Non-Programmable Thermostat Power Method: Hardwired or Battery Stages Heat/Cool: 1/1 Heat/Cool/Heat Pump 4.1 out of 5 stars 40 13 offers from $64.45The simplicity of the Honeywell Home PRO 2000 Horizontal thermostat from Resideo makes it an easy upgrade from basic up-down temperature controls without committing to a WiFi-connected thermostat. The PRO 2000 thermostat has a large, backlit screen that is easy-to-read and features a real-time clock, with simple push-button controls.Foreign companies don’t quite know what to make of China’s leadership transition. Maybe that’s why Honeywell CEO David M. Cote’s simple advice tonight—telling businesses not to ove...The Adept Wireless Programmable Thermostat will replace the following Honeywell CM Series products: CM921, CMS921, CMS921B1042. CM927, CMS927, CMS927B1049. CM727, CMS727, CMS727E1016. CM721, CMS721. The Wireless Programmable Thermostat works with the following Honeywell Wireless Relay Boxes: BDR91.

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1/31/22. Honeywell offers a variety of thermostats that are capable of working with 750 MV heating systems such as fireplaces. Typically these models are battery powered. Thermostats you find at the retail store will indicate on their packaging whether or not it will work with these type of systems. If you've already purchased a thermostat and ...1-Week Programmable Thermostat Support; 5-2 Day Programmable Thermostat Support; Single-stage Programmable Thermostat Support; Pro 2000 Horizontal Programmable Thermostat Support; T6 Pro Smart Thermostat Support; T5/T5+ Smart Thermostat SupportFor a non-programmable Honeywell thermostat, such as the RTH5100B, look for a battery-compartment latch on the upper-right portion of the thermostat. … Buy Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, C-Wire Required, Not Compatible with Line Volt Heating Gray: Paintings - Amazon.com FREE DELIVERY possible on eligible purchases INTRODUCTION. The CM707 thermostat is designed to provide automatic time and temperature control of heating systems in villas and apartments. It can be used as part of a system in conjunction with combiboilers, oil-burners and gas fired boilers, circulation pumps, thermal actuators, zone valves and electric heat systems ( <5A ). T5 SMART THERMOSTAT Manual & Support. RCHT8612WF2015/U, SMHOM8610KIT, RCHT8612WF2015/W, RTH8800WF2022/U, RCHT8610WF2006/U. Download Manual Download Installation Guide. Download Service Datasheet. T5 SMART THERMOSTAT Product Page. Step 2: Gathering the Necessary Tools and Supplies. Before embarking on the battery replacement process, ensure you have the following tools and supplies at hand:. 1. Appropriate Battery: Refer to your thermostat's user manual or the battery compartment cover to determine the correct battery type and size.. 2. Small Screwdriver: A Phillips head or flathead screwdriver, depending on the type ...3.7 Battery Replacement Indicator. An icon appears when the batteries need replacement. This icon will flash for 120 days, then the thermostat. will cut power to the heating/cooling unit. The icon disappears. once the batteries are replaced. After replacing the batteries, readjust the time and day (see section. 5.1).La boîte comprend : Thermostat T4 Pro. Système de montage UWPTM. Adaptateur d'installation standard Honeywell (adaptateur boîtier de raccordement) Plaque de couvercle décorative Honeywell - Petite; dimension 4-49/64 po x 4-49/64 po x 11/32 po (121 mm x 121 mm x 9 mm) Vis et chevilles. 2 piles AA. ….

The Honeywell thermostat requires a specific type of battery, so make sure you get the correct replacement. Insert the new battery into the compartment, following the manufacturer’s instructions. Once the new battery is in place, put the compartment cover back on and screw it in place.Installing your thermostat 9e Select your system type and touch Next. The system type determines other selections for completing initial setup. Use the checklist from Step 6A-d when making selections. 9f Touch Next after making selections on each screen. Next 9g Touch Done on the last screen.PRO 2000 VERTICAL PROGRAMMABLE THERMOSTAT Manual & Support. TH2110DV1008/U, TH2210DV1006/U. Download Manual Download Installation Guide.Honeywell TH6320WF1005 FocusPRO Universal Wi-Fi Thermostat - Programmable Household Thermostats - Amazon.com ... This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. Read full return policy . Returns .Replacing the battery in your Honeywell thermostat is an easy and essential part of keeping it running efficiently. To change the battery, first remove the front cover of your thermostat to access the old battery. Remove the old one and replace it with a fresh AAA or AA alkaline battery depending on which type your model uses.3 69-1631—1. Step 1. Prepare for Installation. 1. Carefully unpack your new thermostat. Save your receipt and make sure you have the following parts: • Thermostat and mounting plate • Labels • Screws and anchors • Installation and Programming Instructions. 2. Gather the needed tools and supplies listed below. 3.How To Replace/Change Honeywell T6 Pro Z-Wave Thermostat Batteries | Model: TH6320ZW2003Step by step instructions Do It Yourself DIY at homekeywords related ...The Breakdown Of Models, Battery Types, And Battery Locations. 1000 Series - 2 AAA batteries, located under the cover plate. 2000 Series - 2 AAA batteries, located under the cover plate. 3000 Series - 2 AA batteries, located under the cover plate. 4000 Series - 2 AA batteries, located under the cover plate. 5000 Series - 2 AA ...A Honeywell thermostat not working after battery change could be caused by misplaced batteries, programming that has been reset or a faulty thermostat. Fixing this problem may include checking if batteries were placed according to their respective terminals or reprogramming your thermostat. In the following chart lets take a quick look … Honeywell programmable thermostat battery replacement, Easy-access battery compartment; Set point retained in memory (in the event of power outage) ... Non-Programmable Thermostat. The Honeywell RTH111B1024 Digital Non-Programmable Thermostat is designed for low volt heating and cooling systems, including milivolt and single-stage heat pumps without auxiliary heat. ... Honeywell Humidifier ..., Honeywell Thermostat Battery Replacement: Step-by-step Process Change Batteries on Honeywell Thermostat 1000, 2000, and 3000 Series. Honeywell's 1000 and 2000 series is immensely popular among folks on a budget. These thermostats offer ultimate convenience and easy controls, thanks to the built-in LED screen., Honeywell thermostats are known for their reliability and user-friendly design. However, like any electronic device, they can sometimes encounter issues that require troubleshootin..., Yes, modern Honeywell thermostats (digital version) do require batteries. The majority of Honeywell thermostat models rely on batteries as a backup power source to maintain functionality and preserve your settings during power outages or when the system is not connected to a power source. While these thermostats are designed to run on battery ..., Price: $69.99 $89.99. You Save: $20.00 (22% Off) - 2 Customer Reviews. Large backlit display and soft-touch button interface. Precise temperature control of +/-1 Degree Fahrenheit with auto change from heat to cool. 7 day programming. Smart Response Technology with filter change reminder and low battery indicator., All Honeywell thermostats that require batteries store them within the control panel. Some models use battery compartments; others require removing the faceplate to access the batteries. Locate the batteries on the panel to replace them. Be sure to replace them carefully, in the correct orientation., Trying to install thermstat and there's no wire comlng from. Tamar D. Mechanic II. Vocational, Technical or Tra... 12,043 satisfied customers. Rth6580wf fan auto not working. Rth6580wf fan auto not. MarkB1247. Commercial Service Techni..., 5 days ago · The T10 Pro and T9 thermostats from Honeywell don't require battery replacements, as they use the C (standard) wire to draw power from the HVAC transformer, operating with a 24-volt supply. However, their wireless indoor sensors rely on AAA alkaline batteries. , T5 SMART THERMOSTAT Manual & Support. RCHT8612WF2015/U, SMHOM8610KIT, RCHT8612WF2015/W, RTH8800WF2022/U, RCHT8610WF2006/U. Download Manual Download Installation Guide. Download Service Datasheet. T5 SMART THERMOSTAT Product Page., Honeywell RTH6350 5-2 Programmable Thermostat - Programmable Household Thermostats ... ‎Battery Powered : Item Weight ‎0.55 Pounds : Voltage ‎240 Volts : Shape ... Just Installed, will watch for accuracy, replaced an older model Honeywell that seemed to become inaccurate for temperature reading after about 2 years. Easy to …, There are many great benefits to having a Honeywell Home programmable thermostat. Honeywell Home The most likely benefit is the cost savings. Turning Honeywell Home the Honeywell Home thermostat down by up to 10 degrees can save you as much as 10 percent a year when run 8 hours a day. You're also Honeywell Home able to create daily or weekly ..., Make a note of the old battery size. Then dispose of the batteries. #4 Replace the Batteries . Replace the old batteries with new ones. Most Honeywell thermostats take two AA batteries. But to be safe, replace your batteries with the same size that were in there before. #5 Replace the Battery Compartment to the Baseplate, Honeywell RTH2310B 5-2 Day Programmable Thermostat $109.00 Only 4 left in stock - order soon. Buy it with This item: Honeywell TH6110D1021 FocusPro Programmable Digital Thermostat, I used the 7-Day Universal Programmable Thermostat to replace my older unit, which is no longer available. This unit is designed to replace a large variety of other thermostats. Installation was straight forward and easy. I needed to call customer service twice for help with special questions. Customer service was easy to reach and knowledgeable., Honeywell DT90E1012 Digital Room Thermostat. Check Price. on Amazon. Thanks to the built-in ECO mode, you can significantly reduce energy costs: its activation keeps the room temperature comfortable for a stay. And the 'OFF' setting allows you to set a specific time for the thermostat to heat, acting as a timer., ‎Honeywell : Controller Type ‎Hand Control : Special Feature ‎Temperature Display : Color ‎White : Specific Uses For Product ‎Heat Pump : Included Components ‎Honeywell TH5220D1003 Electronic Low Voltage Wall Thermostat : Power Source ‎Battery Powered : Item Weight ‎0.45 Pounds : Voltage ‎24 Volts : Shape ‎Curved : Display ..., Product details. Is Discontinued By Manufacturer ‏ : ‎ No. Product Dimensions ‏ : ‎ 6.2 x 5.2 x 2.3 inches; 14.08 ounces. Item model number ‏ : ‎ TH4110U2005/U. Batteries ‏ : ‎ 2 AA batteries required. Date First Available ‏ : ‎ June 14, 2017. Manufacturer ‏ : ‎ Honeywell. ASIN ‏ : ‎ B071X9DGHZ. Best Sellers Rank ..., Installation Guide 4. Wiring. 1 Loosen screw terminals,insert wires into terminal block,then re-tighten screws. 2 Push excess wire back into the wall opening.Keep wires in shaded area as shown at left. 3 Plug the wall opening with non- flammable insulation to prevent drafts from affecting thermostat operation., View online or download Honeywell T8001C Owner's Manual. Sign In Upload. Manuals; Brands; Honeywell Manuals; Thermostat; T8001C; Honeywell T8001C Manuals. Manuals and User Guides for Honeywell T8001C. ... Honeywell OWNER'S GUIDE Programmable Thermostats T8000C, T8001C, T8011R, T8024C., Honeywell rec-ommends using Energizer® batteries. a. Make sure that the System switch is set in the OFF position. b. Using a coin, open the battery door as shown in Fig. 13. c. Install the batteries. Make sure that the positive and nega-tive terminals are oriented correctly as marked inside the battery case. d. Replace the battery door. e., The WiFi 7-Day Programmable Thermostat has a large easy-to-read display and can be adjusted through your smartphone or tablet for convenience. Utility Rewards Available. SELECT A MODEL: WiFi 7-Day Programmable Thermostat. $99.99. $69.99. In Stock. or 4 interest-free payments of $25.00 with. Add To Cart., own battery replacement method. This video shows how to change the batteries in a Honeywell thermostat and which batteries they take. Step 1: Switch Off the Thermostat. Step 2: Remove the Cover. Step 3: Slide Out the Battery Compartment. Step 4: Replace the Batteries: Step 5: Reinsert the … All Honeywell thermostats that have batteries store ..., View and Download Honeywell RTH221B user manual online. Owner's Manual. RTH221B thermostat pdf manual download. Also for: Rth221, Rth221b1021. ... Programmable and non-programmable thermostat (9 pages) ... Page 2: Battery Replacement, Contents hide 1 Honeywell Home RTH2410B Programmable Thermostat 2 About your new thermostat 2.1 Features 2.2 This thermostat is ready to go 3 Quick reference to controls 3.1 A quick reference to display 4 Set the clock 4.1 System switch (Heat/Cool) 5 Fan switch (Auto/On) 6 Using the schedule 6.1 Energy Star® settings 6.2 Modifying […], Maintain Your Ideal Temperature This Honeywell Home T5 Touchscreen 7-Day Programmable Thermostat features a crisp, clear touchscreen for intuitive setup and use. You can schedule your heating and cooling by automatically heating or cooling your home to maintain your ideal temperature. Change it from day-to-day, just on weekends, or keep one ... , Flexible technology for optimal comfort. The T5 7-Day Programmable Thermostat's simple installation and setup puts personalized comfort in your hands. Customize it day-to-day or create a special weekend program based on your heating and cooling preferences. SELECT A MODEL: T5 7-Day Programmable Thermostat. or 4 interest-free payments …, View and Download Honeywell T3 user manual online. Programmable Thermostat. T3 thermostat pdf manual download. ... T3R, T3M Programmable Thermostat EN User Guide Programmable Thermostat Wireless Programmable ... Thermostat Interface Screen and Button Overview 1030 13 Middle button Programming Menu Optimisation Settings Menu Low battery 14 Left ..., Honeywell T8665A1002 - Chronotherm+ IV Communicating Thermostat (Premier White)- Chronotherm IV Plus RF Wireless Programmable Thermostat provides wireless control of 24 Vac heating and cooling systems. ... (Fan): AUTO-ON Power Method: Battery, Communicating Terminal Designations: Wireless Dimensions (in.): 3 3/4 in. high x 6 1/16 in. long x 1 9 ..., A Honeywell thermostat not working after a battery replacement could be due to not inserting the correct batteries, inserting them incorrectly, or following the wrong battery replacement procedures. For many Honeywell thermostats, for instance, resetting is a necessary first step. Thus, by checking a few aspects, you might find the problem easy ..., View step-by-step instructions of how to replace the batteries on your Honeywell T6 thermostat. SmartRent support can also walk you through how to change the..., The Honeywell Home 5-2 Day Programmable Thermostat with Backlight has a simple interface and offers separate weekday and weekend programming. ... Battery Back-Up, Filter Indicator, Lockable, Low Battery Indicator. Power Options ... The Honeywell Home 1-Week Programmable Thermostat has a simple interface and offers one basic program for the ..., How to change the AA batteries in a Honeywell Thermostat. It's easy on the right hand side top it says press Just press down and slide to the right then pull..., Step 2: Gathering the Necessary Tools and Supplies. Before embarking on the battery replacement process, ensure you have the following tools and supplies at hand:. 1. Appropriate Battery: Refer to your thermostat's user manual or the battery compartment cover to determine the correct battery type and size.. 2. Small Screwdriver: A Phillips head or flathead screwdriver, depending on the type ...