Honeywell programmable thermostat battery replacement

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.

Battery replacement.................................. 17 Customer assistance ................................ 18 In case of difficulty .............................. 19–20 Limited warranty........................................ 21. This thermostat is ready to go! Your new thermostat is pre-programmed and ready to go. See page 10 to check settings.Introduction to the Honeywell Home RTH2300 Thermostat. Modal 1. How to enter and navigate advanced programming on the Honeywell Home RTH2300 thermostat. Modal 1. How to install a sub base for the Honeywell Home RTH2300 thermostat. Modal 1. How to properly remove an old thermostat for replacement. Modal 1. Show all.With the cover securely in place, you are now ready to proceed to the final step of the battery replacement process, bringing your Honeywell thermostat back to full functionality. With the thermostat cover securely reattached, you have effectively safeguarded the internal components of the device, ensuring that the newly installed batteries are ...This video tutorial guides you through the process of changing the batteries in your Honeywell Thermostat. 🔧 Subscribe to our channel: https://www.youtube....Google Home is a tough contender for the Amazon Echo, but it launched with much less third-party support. Now, the company’s added Belkin WeMo and Honeywell to the list of supporte...

Honeywell 'The Round' CT87K battery question. During a bit of home renovation, one of the thermostats got removed for painting, then dropped and flew apart.... After realizing it wasn't the mercury model I thought it was, I relaxed a bit - I plan to replace it 'just because', but it does seem to work after snapping all the bits back together.Low Voltage, High Performance. Program comfort for your low voltage HVAC system with the Honeywell Home 5-2 Day Programmable Thermostat. It's compatible with several types of low volt heating/cooling systems. Plus, it comes with weekday/weekend programming and up to four presets like: wake, leave, arrive and sleep. Precise Comfort.To replace the batteries in your Honeywell thermostat, follow these steps: 1) Turn off the thermostat. 2) Remove the thermostat cover. 3) Take out the old batteries and dispose of them properly. 4) Insert the new batteries, ensuring the positive and negative terminals align correctly.Operating Manual 69-2727ES—01 8. Select the fan setting. Set the FANswitch to Auto or On. In "Auto" mode (the most commonly used setting), the fan runs only when the heating or cooling system is on. Ifsetto"On,"thefanrunscontinuously. Set FANswitch to choose whether the fan runs continuously or only as needed.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.View and Download Honeywell T10 Pro Smart user manual online. with RedLINK. T10 Pro Smart thermostat pdf manual download. ... Pro series non-programmable thermostat (24 pages) ... Page 28: Replace Sensor Batteries Battery Replacement (indoor sensor) The T10 thermostat does not use any batteries. It is powered by 24 volts from the HVAC ...

Shop Honeywell Home Electronic Non-Programmable Thermostat in the Non-Programmable Thermostats department at Lowe's.com. The RTH111B Non-Programmable Thermostat offers simple and reliable temperature control. It features an easy-to-use digital display with soft-touch buttons that ... Easy-access battery compartment and change battery reminder.Heat and Cool Non-Programmable Thermostat. The Honeywell CT31A1003/E Heat and Cool Non-Programmable Thermostat features low voltage controls and a convenient snap-action switch that allows users to adjust freely between heating and cooling systems. ... Direct replacement for one the stopped woking. Brian Moore March 7, 2014. Verified …The Wi-Fi 7-Day Programmable Touchscreen Thermostat is Wi-Fi enabled for remote access from anywhere in the home. With the free app, you can control the thermostat with your smartphone or tablet from anywhere in the world. ... Auto change from heating to cooling ; One-year limited warranty; ... Honeywell Wi-Fi 7-Day Programmable …Honeywell Home CT87K1004 Round Heat Only Non-Programmable Manual Thermostat. Video. Availability: In Stock. Price: $37.95 $53.95. You Save: $16.00 (29% Off) - 5 Customer Reviews. Add to Cart. Mercury free thermostat with simple worry-free operation. Honeywell Classic Round design, world's most popular thermostat.

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PRO 2000 VERTICAL PROGRAMMABLE THERMOSTAT Manual & Support. TH2110DV1008/U, TH2210DV1006/U. Download Manual Download Installation Guide.The steps for replacing the battery on a Honeywell Home Pro Series thermostat are relatively simple. First, you need to locate the battery compartment on the thermostat. Then, you need to remove the cover plate and take out the old batteries. Finally, you can insert the new batteries and replace the cover plate.Mar 26, 2012 ... Changing the batteries on your Honeywell 8000 Thermostat. 30K views · 12 years ago ...more. campbellandcompany.Put the cover back on: After the new battery is in, snap the thermostat cover back into place. Turn the power back on: Finally, turn the power back on by flipping the circuit breaker back on. Wait a few minutes after changing the battery to see if the low battery warning goes away.Welcome to the world of comfort and energy savings with your new Honeywell Programmable Thermostat. Your new thermostat will automatically control the temperature in your home, keeping you comfortable while saving energy. Weekday/Weekend (5-day/2-day) Programmable Heat and/or Cool Low Voltage (20 to 30 Vac) Thermostat and Mounting Plate Model ...

LavaTap Pro Honeywell Wired Central Heating Programmer Boiler Plus Compliant. Made and supported by Honeywell. Easy replacement for the older versions of CM701 CMS701 CM707 CMS707 CM707A1029 CM907 CM901 CMS907 CMS907B1049 CMT901A1004 wired room thermostats. Built-in memory retains user program even following battery removal. Please note that this unit has 2 On/Off periods per day, compared to ...Wireless programmable room thermostat designed and made by Honeywell (Resideo) as a direct replacement for the following Honeywell models:- CM727 CMS727 CMT727 CM921 CMS921 CM927 CMS927. The receiver can be paired to Honeywell BDR91 relay boxes that came with latter Honeywell models, they are generally square in shape …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 …What are the hours for customer support? Last updated. 10/17/23. You can contact Homeowner Customer Support during the hours of: Mon-Fri: 9am - 8pm CDT. Sat-Sun: 9am - 5:30pm CDT. Phone: 1-800-633-3991. Chat: Live Chat Request. Social: Mention us or post directly to our profile/channel: Facebook, Twitter, LinkedIn, Instagram.Put the cover back on: After the new battery is in, snap the thermostat cover back into place. Turn the power back on: Finally, turn the power back on by flipping the circuit breaker back on. Wait a few minutes after changing the battery to see if the low battery warning goes away. View Replacement Model. Price: $49.99 $59.99. You Save: $10.00 (16% Off) - 2 Customer Reviews. Easy to use. Large backlit digital display. Display options include degree Celsius or Fahrenheit temperature. Easy-access battery replacement. Set point retained in memory (in the event of power outage) You have up to 2 months to use the TH6210U2001 thermostat after you see the low battery icon before the batteries are no longer usable. Alkaline batteries are recommended as perfect replacement for the batteries. The batteries should be replaced once a year and before going for trips longer than a month. My Honeywell T6 thermostat has a low ...Replace The Fuse. Not all Honeywell thermostats depend upon a connection to your house's wiring, but if yours does, you may need to replace the fuse after changing the batteries. A system overload can cause the fuse to blow or your circuit breaker to trip. Replacing batteries won't make the system work again if either of these things has ...Replacing the battery of a Honeywell thermostat is an easy process that requires a few simple steps. First, locate the battery compartment on the thermostat. Then, remove the cover of the compartment by gently pulling it off or using a screwdriver to pry it open. Next, remove the old batteries and replace them with new ones.5-2 Day Programmable Thermostat . This 5-2 Day programmable thermostat is in tune with the way you live. You can program it for weekday and weekends, plus up to four periods per day. Features such as the backlit display make it easy to use, while precise temperature control maximizes your home's comfort.

Honeywell 7-Day Programmable Line Volt Thermostat for Electric Heating - TH115-A-120S/U TH115-A-120S-c1 dummy Mysa Smart Thermostat for Electric in-Floor Heating | High Line Voltage Heating, Class A GFCI Temperature Sensor, Works with Smart Assistants, Control Remotely with Phone/Tablet, Quick & Easy Install

Honeywell Home Winter Watchman Non-Programmable Thermostat - CW200A . MPN: CW200A1032/E1 (13) $21.95 Save: $9.00 ... Contacted Honeywell customer service and they were extremely helpful. Sent them pics of both the defect and serial number, and they sent a replacement immediately. Will definitely be buying their products in the future. Great ...yourhome.honeywell.com RTHL2510/RTHL2410 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 ...Put your fingers at the bottom of the thermostat. Now pull the cover with your fingers to take the cover off. Replace The Batteries. Once you have taken off the cover it is time to replace the batteries. Now, change the old batteries and insert 2 AA batteries. Make sure you have inserted them with the correct polarity.VisionPRO Wi-Fi Programmable Thermostat. Model TH8320WF. This thermostat works on 24 volt systems. It will NOT work on 120/240 volt systems. This thermostat contains a Lithium battery which may contain Perchlorate material. Perchlorate Material—special handling may apply.Honeywell TH5220D1003 (replaced by TH5220D1029) FocusPro 5000 Digital Non Programmable Thermostat. Order by 5 PM EST (M-F) usually ships the same day if in stock. See link below for Direct Replacement or call us at 1.866.620.8417. Get the lowest prices on Honeywell TH5220D1003 everyday at FurnacePartSource.com, home to over 500,000 HVAC parts ...Operating Manual 69-2727ES—01 8. Select the fan setting. Set the FANswitch to Auto or On. In “Auto” mode (the most commonly used setting), the fan runs only when the heating or cooling system is on. Ifsetto“On,”thefanrunscontinuously. Set FANswitch to choose whether the fan runs continuously or only as needed.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. The programmable thermostat comes with simple ...Order Honeywell Home T4 1-Channel Wired Programmable Thermostat at Screwfix.com. Screwfix customers rate this product 4.4/5. FREE next day delivery available, free collection in 1 minute. ... 2 x AA Batteries Required: Brand: Honeywell Home: Central Heating Control Type: Thermostats: Colour: White: Communication Protocol ... Mains or Battery ... *Disclosure, these are amazon affiliate links. If you purchase a product or service with the links that I provide I may receive a small commission. There is...

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This video shows how to change the batteries in a Honeywell thermostat and which batteries they take. View Replacement Model. Price: $49.99 $59.99. You Save: $10.00 (16% Off) - 2 Customer Reviews. Easy to use. Large backlit digital display. Display options include degree Celsius or Fahrenheit temperature. Easy-access battery replacement. Set point retained in memory (in the event of power outage) Jul 19, 2010 ... Comments73 · How to tell if your home thermostat is bad · Honeywell Pro Series Thermostat Battery Replacement (BATT) · How To Change The Batte...Page 1: User Guide. RTH221 User Guide Programmable Thermostat Fan switch Operation Use the Fan switch to select the fan operation. Controls • Auto: The fan runs only when heating or cooling is actually taking place (commonly used setting). • On: The fan runs continuously. Press to set clock or schedule Fan switch...Thermostats Take control of your home comfort and save on energy costs with a range of Honeywell Home thermostats. From smart WiFi thermostats with room sensors and humidification control, to programmable and non-programmable thermostats, Honeywell Home products meet a variety of needs. 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 ... The Honeywell RTH9585WF1004 Wi-Fi Smart Color Programmable Thermostat offers the best of both worlds in performance and versatility by utilizing Amazon Alexa and a selection of Smart/Intelligent Features. The Honeywell RTH9585WF1004/W Wi-Fi Smart Color Programmable Thermostat is compatible with: Amazon Alexa; SmartThings; Google Home; IFTTTHoneywell Smart Room Sensor for T9 thermostats have a range of up to 200 ft. and a 1-year battery life. Install sensors practically anywhere you want. Special Offers. 10% Off Your Next Order; Free Shipping - Smart Lights; ... For T9/T10 Honeywell Home Thermostats - RCHTSENSOR-1PK. Video. Availability: In Stock . Price: $41.95 $58.95.Programmable Thermostat RTH9580 Wi-Fi. 2 Install your thermostat. Connect your home Wi-Fi network. Register online for remote access. 1 2 3 Welcome ... HONEYWELL MODEL: RTH8580WF MAC ID: MAC CRC: 69-2723EFS-01 Thermostat ID Card Use the MAC ID and CRC ID to register this product at mytotalconnectcomfort.comWiFi Thermostats. With WiFi Thermostats like our Honeywell Home T9 Smart Thermostat, we bring you helpful, connected products so you can enjoy optimal comfort in your home. Shop online or connect with a Pro for consultation and installation to help manage energy costs while maintaining a comfortable temperature. Home. Shop All Products. ….

Page 1: User Guide. RTH221 User Guide Programmable Thermostat Fan switch Operation Use the Fan switch to select the fan operation. Controls • Auto: The fan runs only when heating or cooling is actually taking place (commonly used setting). • On: The fan runs continuously. Press to set clock or schedule Fan switch...SINGLE-STAGE PROGRAMMABLE THERMOSTAT Manual & Support. RTH2510B1000/W1, RTH2510B1018/E1, RTH2410B1019/E1. Download Manual. SINGLE-STAGE PROGRAMMABLE THERMOSTAT Product Page.Feb 2, 2024 ... Comments3 ; Honeywell Pro Series Thermostat Battery Replacement (BATT). Todd's Garage · 425K views ; The CONTROVERSIAL Scene That Took Gunsmoke Off ...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.Turn it over to access the battery compartment. If the battery compartment is covered, remove it then take out the batteries. Replace them with new ones. Turn the thermostat's faceplate over again then slide it back to place carefully. Snap it into place with care to avoid any locks from breaking.Honeywell RTH230B. RTH2 30 B 69-1800 2/6/05 1/4. The RTH230B programmable thermostat can be used to control: • a gas, fuel oil or electric furnace - 2 or 3 wires. • a central air conditioner - 2 or 3 wires. • a hot water system with or without pump - 2 wires. • a millivolt system - 2 wires. • a central heating and cool ing system - 4 ...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 ...Honeywell TH5220D1003 (replaced by TH5220D1029) FocusPro 5000 Digital Non Programmable Thermostat. Order by 5 PM EST (M-F) usually ships the same day if in stock. See link below for Direct Replacement or call us at 1.866.620.8417. Get the lowest prices on Honeywell TH5220D1003 everyday at FurnacePartSource.com, home to over 500,000 HVAC parts ... Honeywell programmable thermostat battery replacement, Honeywell RTH230B. RTH2 30 B 69-1800 2/6/05 1/4. The RTH230B programmable thermostat can be used to control: • a gas, fuel oil or electric furnace - 2 or 3 wires. • a central air conditioner - 2 or 3 wires. • a hot water system with or without pump - 2 wires. • a millivolt system - 2 wires. • a central heating and cool ing system - 4 ..., 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., 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 , Honeywell RLV3120A for Electric Baseboard Heating Digital Non-Programmable Thermostat. Video. Availability: In Stock. Price: $29.99 $39.99. You Save: $10.00 (25% Off) - 33 Customer Reviews. Add to Cart., 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 Support, STEP 1 - First, turn off the HVAC system switch. STEP 2 - Use a coin to open the battery compartment of Honeywell thermostats. STEP 3 - Take out the batteries and wait for some time. STEP 4 - Now insert the batteries back again in their correct order. STEP 5 - Ensure that the alignments of the terminals are correct., The RTH5160 Simple Display Non-Programmable Thermostat has all the features you love - straightforward readings, single-degree control, basic functions - with a backlit, easy-to-read display that shows both your temperature and set point simultaneously. Change is Good. This thermostat is all about change., 68K views 4 years ago. 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..., How to change battery in Honeywell thermostat cool on but not working ac. Replace batt air conditioner if central air thermostat not working. Remove face-pla..., Step 1: Remove the battery compartment. The battery compartment on a Honeywell thermostat is located on the side of the device. To remove it, first push the …, ‎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 ..., The 6000 Honeywell Thermostat series has a battery sliding compartment, which makes the replacement process pretty simple. Firstly, turn the thermostat off, disconnecting it from the circuit breaker. Slightly press and slide the cover out from the bottom of the Honeywell thermostat and carefully remove the battery holder., 7-Day Programmable Thermostat with Touchscreen Display. 1.6k. (897) Questions & Answers (207) Hover Image to Zoom. $ 64 61. Pay $39.61 after $25 OFF your total qualifying purchase upon opening a new card. Apply for a Home Depot Consumer Card. Simple operation and 7-day, 4-time-period touchscreen programming., Turn off the Thermostat. Just press and pull the cover to take out the battery compartment from the top right corner. Take out the battery compartment and Replace the battery (AA). Now, place the top cover as it was before. You have replaced the battery, its time to switch on the Thermostat., honeywell thermostat model t8112d1005. honeywell thermostat t8112d. honeywell thermostat t8112d1005 1 manual. honeywell thermostat t8112d1005 wiring. honeywell t8112d1005 thermostat instructions. honeywell t8112d1005 wiring diagram. honeywell t8112d1005 replacement. honeywell t8112d1005 reset. honeywell thermostat t8112d1005 low battery, 15 min read. Contents. If you're looking to replace the battery in a Honeywell thermostat, it's a simple procedure. Quick Summary: You change the battery in a Honeywell thermostat with these 6 steps: 🔌Step 1: Switch Off the Thermostat. 🔧Step 2: Remove the Cover. 🔋Step 3: Slide Out the Battery Compartment. 🔄Step 4: Replace the ..., Honeywell programmable thermostat installation guide (20 pages) Thermostat Honeywell TH8110U1003 - VisionPro Thermostat Operating Manual. Touchscreen programmable thermostat (96 pages) ... Page 20: Battery Replacement Even if the warning does not appear, you should replace batteries once a year, or before leaving home for more than a month. ..., Step 1: Remove the battery compartment. The battery compartment on a Honeywell thermostat is located on the side of the device. To remove it, first push the tab on the top of the thermostat. Then pull it to remove the compartment — …, To replace the batteries in a Honeywell 3000 Thermostat, follow these steps –. In addition to disconnecting the Thermostat from power, you must disconnect the power to the circuit. Pull the thermostat bottom to detach the cover plate from the base plate. Take out the worn-out batteries and swap them out for fresh ones., TH4110U2005 - Upgraded Replacement for Honeywell T4 Pro Programmable 1H/1C Thermostat - Amazon.com ... Honeywell TH4210U2002 T4 Pro Programmable Thermostat 2H/1C 1H/1C. $65.59 $ 65. 59. Get it as soon as Monday, Apr 15. In Stock. ... Battery Powered ..., ‎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 ..., Step 2: Remove the Cover. With the thermostat safely powered off, the next step in replacing the battery is to remove the cover to access the internal components. Follow these straightforward instructions to remove the cover of your Honeywell Smart Thermostat: Locate the Release Latch: Depending on the model of your Honeywell Smart Thermostat ..., 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 post 6 Best Smart Thermostats of May 2024 first appeared on Newsweek Vault. ... The Honeywell Home RTH9585WF is renowned for its ease of use, offering single-tap programming, autonomous self ..., Description. -. Overview: The PRO non-programmable family of thermostats provides basic and simple operation with specific models for conventional and heat pump systems. Features: Large Display: 2.38 sq. in. versus 1.32 sq. in. display of legacy thermostat. Same wiring terminals of legacy TH1110DH1003. 1 Heat/1 Cool Conventional., 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., Make sure to align the positive (+) and negative (-) ends of the batteries with their corresponding markings inside the battery compartment. This alignment is essential for your Honeywell thermostat to operate correctly. Forgetting this step may result in your device not working as intended after changing the batteries., Control heating and cooling with the right thermostat for your home. When replacing a thermostat, decide on the type of thermostat you prefer. Choose from a wide variety of models and prices. Pick from simple temperature readers to smart programmable thermostats.Some home thermostats let you choose Fahrenheit or Celsius readings. For easy heat control, pick a dial-type thermostat and set it to ..., Removing the Honeywell T4 Pro thermostat is simple: just pull it from the wall. Pull gently, and wiggle it a bit if necessary. It should pop off easily. Step 2: Remove the old batteries. Unlike with other versions of the Honeywell thermostat, there is no internal battery compartment. You can easily access the batteries on the back of the ..., Install the battery or batteries in the thermostat body (if applicable). Make sure the battery size and polarity are both correct. Tip: When shopping for your home thermostat replacement, check the package to ensure it is compatible with your home's system. ... Honeywell Home 5-2 Day Programmable Thermostat with Digital Backlit Display (2371 ..., 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, So if your Honeywell thermostat is not giving the right temperature reading, check to see if the sensor is faulty. If that is the case, there is no other way to fix it than to get a new sensor to replace the faulty one. 4. Change Air Filters. This is another reason a thermostat may develop wrong temperature reading issues., 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.