Honeywell home cool on blinking

If the screen of your Honeywell thermostat is blank, you should first check the furnace or air conditioner to be sure both are on and functioning properly. If the door to the furnace is open, for instance, the thermostat display may be blank. A fix could be as simple as closing the door of the furnace. You should also check the circuit breaker ...

Honeywell home cool on blinking. If you notice a blinking snowflake or flame emblem on the screen of your thermostat when you try to turn on your air conditioner that means that your system just recently shut off and the thermostat is in delay. When you try and start your air conditioner before the delay timer has gone off it will show the snowflake emblem on your thermostat ...

Different ways to secure the panel for Honeywell Thermostats. 3. Check the Batteries. One of the most common causes of issues with thermostats is the battery running out or being faulty. Honeywell thermostats are no exception. Faulty batteries could be causing your thermostat's screen to go blank and unresponsive.

SKU: RTH221B1039/U1. Easy to Install and Program With the Honeywell Home 1-Week Programmable Thermostat from Resideo, you can customize comfort to fit your weekly schedule. It's easy to install and works with all standard home HVAC systems. SELECT A MODEL: 1-Week Programmable Thermostat.10 DIY Ways to Fix Honeywell Thermostat Cool On Blinking. Here are 10 common troubleshooting tips to stop your Honeywell thermostat from blinking Cool On: 1. Wait 10 Minutes; As mentioned if the blinking Cool On goes away after 5-10 minutes, the system likely just needed time to start up and begin cooling your home.May 27, 2010 · Okay, let's try this: first, turn the thermostat off, then remove the batteries from the thermostat and leave out until the display goes completely blank. Now, reinstall the batteries and turn the switch back to cool and lower the desired temp below the indoor temp. The 'cool on' may flash, but leave the thermostat alone for 5-10 minutes and ... However, if your Honeywell thermostat has been blinking for more than 5 minutes and you still cannot feel any cooling, resetting the thermostat can fix the issue. In this article, I discuss the different steps you can take to resolve the issues with ‘Cool On’ on your Honeywell thermostat and explain the different problems that may have ...Clean the slot from dust and insert the new batteries. Ensure that you place the positive and negative sides of the batteries in the appropriate positions and slide the slot back into the thermostat. If the thermostat display is still blank, you have to keep on troubleshooting. Step 4. Check the wiring.One of the most frequent reasons for a red light is a low battery. When the thermostat's battery power is running low, the red light may start blinking rapidly or remain lit steadily. This signal prompts you to replace the batteries promptly to ensure uninterrupted operation. 2. Heating or Cooling System Malfunction.Honeywell thermostat flashing “cool on”. A/C is not blowing cold air. : r/HVAC. Honeywell thermostat flashing “cool on”. A/C is not blowing cold air. Thermostat is set to 70°. It’s currently 76°. First time I’ve ever seen this. Please help! Two kids are human heaters and need the cool air when they sleep.Feb 10, 2021 · If your thermostat is blinking “cool on” one of three things has taken place. Someone tried to restart the compressor before the refrigerant had time to settle. A sudden change from cool to heat, or heat to cool. Changing the batteries in your system may also cause this to happen. Honeywell thermostats are equipped with a second line of ...

If your Honeywell humidifier has stopped working, the first thing you should do is reset it. To do this, simply unplug the unit from the power outlet and then plug it back in. This will often clear any minor issues that may have caused the unit to stop working. The humidifiers have different settings.I have a ducane ac10b48-a, and when i turn the thermostat to cool, set a temp, the COOL ON blinks but a/c does not kick on. I turn he fan to on, let it run, and then switch back to COOL and the outsid … read moreThe Honeywell thermostat is flashing cool, which is a symbol that means there’s a problem. Your thermostat wants cool air, but the cooling system isn’t working correctly. It can be frustrating, especially on hot summer days when you want your home to stay nice and cool. 2.2. Possible Cause. Several factors can contribute to the cool on ...The Honeywell Ac Thermostat Cool On Blinking Issue. Understanding the Honeywell AC Thermostat Cool on Blinking issue is crucial for maintaining optimal performance of your air conditioning unit. The blinking indicator on the thermostat serves as a warning signal and should not be ignored.Lets delve in the reasons and solutions for why my honeywell thermostat flashing “Cool On”! The Honeywell thermostat is a reliable tool for controlling indoor temperature, known for its user-friendly features and energy efficiency. However, users may encounter the “Cool On” flashing message, which can be puzzling.Select “Reset”. Select “Schedule Reset”. PERFORMING A HOMEKIT RESET. Press the Menu Icon. Scroll down to “Thermostat Information. Record the “Date Code”. Press the “back” arrow, then scroll down to “Installer Options”. Enter the Date Code when prompted to “Enter your password”. Select “Reset”.First, set the thermostat to the lowest possible temperature. Ensure that the mode is set to "Cool" and that the fan setting is on "Auto.". After making these adjustments, give it some time. Check if the AC comes to life or if you experience any change in the room's temperature. This will help determine if the thermostat is effectively ...When the word HEAT or COOL flashes it indicates that the thermostat is telling the heating or cooling system to run. If the heating or cooling system is not running then there most likely is a problem within the system. Contact a local heating / air conditioning contractor in your area to service your equipment.

In today’s digital age, home security has become a top priority for homeowners. With the advancements in technology, it is now easier than ever to keep an eye on your property and ...The blue blinking light on a Honeywell hot water heater indicates that there is a problem with the system's temperature or pressure. It could be something as simple as a faulty thermostat control, or it could point to a more serious issue like a broken heating element or a gas leak. Either way, it's important to address the issue quickly in ...Cool on indicator flashing on Honeywell thermostat I have a honeywell pro th4000 series system. The fan will not blow air unless there is a call from the system. If "wait" is in the screen or "cool on" is flashing - wait 5 minutes for the system to safely respond. T6 PRO PROGRAMMABLE THERMOSTAT Product Page. Just like with the month, you will be automatically asked to select the day ...7 Steps to Troubleshoot a Honeywell Thermostat Flashing "Cool On" Message. 1. Check Thermostat Settings. 2. Check Your Thermostat's Battery. 3. Set Your Thermostat to The Lowest Temperature. 4. Check If Both the Outdoor and Indoor Units Have a Power Supply.The “Cool on” message on a Honeywell thermostat is also known as “delay mode”. It often flashes in the form of a blinking snowflake or as the word “wait’ as well. It’s a courtesy message to let you know that the AC will delay in coming on for approximately 5 minutes in order to protect your unit from short cycling which can cause ...

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Select “Reset”. Select “Schedule Reset”. PERFORMING A HOMEKIT RESET. Press the Menu Icon. Scroll down to “Thermostat Information. Record the “Date Code”. Press the “back” arrow, then scroll down to “Installer Options”. Enter the Date Code when prompted to “Enter your password”. Select “Reset”.If you have a heat pump, you will not use a wire in the W terminal. Move the W wire to the W2 or Aux terminal. (W controls your first stage of heating for Gas/Oil/Electric systems. O/B and Y control your first stage heating for heat pump systems. Backup heat sources must be connected to the W2, Aux, or E terminal for proper functionality.)Press and hold the Fan Button and Up Arrow for about 5 seconds to change the screen. Press Back Button or Next Button until 39 appears on the left. Press the Up or Down Arrows to change the number on the right to 0. Press Done Button. "WiFi Setup" will appear on the thermostat screen after 1-2 minutes. To reconnect the thermostat to WiFi.Different ways to secure the panel for Honeywell Thermostats. 3. Check the Batteries. One of the most common causes of issues with thermostats is the battery running out or being faulty. Honeywell thermostats are no exception. Faulty batteries could be causing your thermostat's screen to go blank and unresponsive.Remove the old batteries, noting where the positive and negative ends are placed. Dispose of them properly and then insert your new batteries. Slide the battery compartment back into place, bottom first. A little push, and it should snap back into place. With fresh batteries, your thermostat should automatically turn back on in a few minutes.To set your Honeywell Thermostat to permanent hold, you need to first press the + or - button and adjust the temperature. The thermostat will display 'temporary hold' along with a flashing setpoint temperature. While the temperature is flashing, press the 'hold' button and change it to permanent hold. I was trying to take a nap on an ...

Poe. The "cool on" blinking indicator on a Honeywell thermostat is a sign that the thermostat is in a delay mode [2]. This delay mode is designed to protect your HVAC (heating, ventilation, and air conditioning) system from short cycling, which is the rapid turning on and off of the system [2]. Here is the meaning and possible causes of the ...Turn ON the thermostat. Press the PROGRAM button thrice. The reset button is located inside a small hole on the front panel of the thermostat and to the right of the buttons. Use a sharp object (toothpick, paperclip, or pin), put it in the hole, and press the button for about 5 seconds. Now, your thermostat has been reset.Honeywell Thermostat Cool on Not Working. ... This usually happens if it's in delay and the flashing icon is an indicator. If you notice the flashing icon, give it five minutes, and it should be up and running. ... You can also get a smart homeroom sensor like the Honeywell Home Smart Room Sensor to help you make necessary adjustments. And ...or call Honeywell Customer Care toll-free at 1-800-468-1502. This manual covers the following models: TH5110D:For 1 Heat/1 Cool systems. TH5220D:For up to 2 Heat/2 Cool systems. TH5320U:For up to 3 Heat/2 Cool systems. MCR29404(Remove battery holder to find model number) FocusPRO. ®TH5000 Series 1 69-1923EFS—01. ENGLISH.Select "Reset". Select "Schedule Reset". PERFORMING A HOMEKIT RESET. Press the Menu Icon. Scroll down to "Thermostat Information. Record the "Date Code". Press the "back" arrow, then scroll down to "Installer Options". Enter the Date Code when prompted to "Enter your password". Select "Reset".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.To reset the system's schedule, press the System button. Next, hold the blank box that's in the center of the screen. When the numbers panel comes up, enter 0165 on the left and the number one on the right. Now press Done and your thermostat should have a reset schedule.Honeywell Thermostat Cool On Blinking (Why It Occurs And How To Resolve The Problem - Easy Guide!). In this video tutorial I will show you how to fix Honeywe...

A blinking “Cool On” message can indicate various causes, such as dying batteries, a power surge, or a power outage. Thermostat batteries generally last for an average of 10 months, making it easy to identify when dead batteries are responsible for the blinking message. However, sometimes a Honeywell thermostat can recuperate after a power ...

Honeywell AC thermostats have a cool-on blinking light that indicates the unit is working to cool down the room. This could be due to either an incorrectly set temperature or because of an issue with the thermostat itself. If you find your Honeywell AC thermostat’s cool on light blinking, first check and make sure that you have selected a ...Read also: Honeywell Thermostat Flashing "Cool On" [7 Easy Fixes] 5. Furnace Ignition Problems. If you use a furnace for heating and your Honeywell thermostat says heat on but no heat coming through, there could be problems with your furnace ignition. Some issues that prevent your furnace from igniting include. Closed gas valve; Dirty flame ...Conclusion – Honeywell Thermostat Cool On Blinking. In most cases, a blinking “Cool On” indicator on a Honeywell thermostat simply means that there is a delay, and the system will start working normally after about 5-10 minutes. If the problem persists, try bypassing the thermostat or troubleshooting the system further.Mar 3, 2022 · Change the batteries. Replace air filters. Check the furnace door/power switch. Inspect air conditioner coils. Replace the thermostat. Call in an HVAC specialist. Honeywell thermostat set to cool but heating. Confirm the thermostat is set up properly. Lower the temperature on the thermostat. CLICK LINKS BELOW FOR ITEMS IN/RELATED TO VIDEO🍒 Here's my thermostat https://amzn.to/3cMWO9X🍒 Upgrade to this one? https://amzn.to/3Sc8L9v🍒 This one al...To wrap it up, if you find the purge light on your Honeywell mini zone controller blinking, it indicates a potential issue with the discharge air sensor or other components of the system. Remember to ensure that the discharge air sensor is securely attached and consider replacing it if necessary. Additionally, check for any loose …The fan helps to cool the condenser, so if it's not working, the condenser will overheat, and the light will start blinking. If you think either of these might be the problem, you should call a technician to come and take a look. 8. Frozen Evaporator Coils. One explanation for your air conditioner's light blinking is frozen evaporator coils.Your Honeywell thermostat says heat on but no heat because there could be several reasons for this issue. First, check if the thermostat temperature setting is higher than the current room temperature. Ensure it’s in “ Heat” mode and not set to “Cool” or “Off.”. Confirm the thermostat has power, including checking the circuit breaker.First check that the thermostat is set to the Heat position. Make sure the temperature is set higher than the Inside temperature reading. Also check the circuit breaker and reset if necessary. Make sure that the furnace door is closed securely. If “wait” is in the screen or “heat on” is flashing – wait 5 minutes for the system to ...A loose wire is one of the common reasons behind the Honeywell thermostat blinking the HEAT ON. When the thermostat blinks the HEAT ON, your device is in a 5-minute delay to give you heat. But more than 5 minutes is abnormal. The device increases the delay when the wires are loose and fail to signal your HVAC properly.

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This TrueZONE® HZ221 Panel is for use with single stage heat pumps with auxiliary heat applications, up to two zones. Operating at a maximum voltage of 24 volts, it comes with auto changeover and a resettable fuse.Honeywell zone panel turning on cool of instead of heat. Ask Question Asked 6 years, 4 months ago. Modified 6 years, ... At that point the thermostat was blinking heat on, then solid heat on, then auxiliary heat came on and then the system would turn off. Now, it goes through the same sequence on the thermostat but the system never turns on and ...PRO 5-2 Programmable Thermostat for Heat/Cool Systems or Heat Pump without Auxiliary HeatHoneywell Th1110D2009 Troubleshooting. 1. Check the power source to make sure it is connected and working properly. 2. Make sure all connections are secure, including any wiring that connects the thermostat to your HVAC unit or other components of your home heating/cooling system. 3.Return is when you get back home, and Sleep is for the sleeping period. When your thermostat reads “Return,” it means that the Return schedule is currently working. Return programming makes sure that your home is at an ambient temperature when you get back from work. It follows the Leave time period where the temperature is …Press on "System". Then, press and hold the center black buttons for 5 seconds. Choose "Reset Factory Settings". Wi-Fi Reset. Disconnect the router's faceplate. Briefly unplug the wireless router. Reconnect the power and faceplate. Press "System" on the thermostat. Hold the middle buttons to access a new screen.Replacing an old Honeywell thermostat usually involves changing to a newer model or to an energy-efficient programmable digital thermostat. This process is straightforward and can ...Your Honeywell thermostat says heat on but no heat because there could be several reasons for this issue. First, check if the thermostat temperature setting is higher than the current room temperature. Ensure it's in " Heat" mode and not set to "Cool" or "Off.". Confirm the thermostat has power, including checking the circuit breaker.Did you know that a blinking “Cool On” indicator on your Honeywell AC thermostat could be the key to unlocking a refreshing and comfortable home? It’s true! … ….

By following the guide below, you can identify and resolve the problem, ensuring your home stays cool and comfortable during hot summer months. Page Contents. 1 Understanding Your Honeywell Thermostat; ... The Honeywell AC thermostat cool on blinking issue can be resolved through a series of troubleshooting steps. Start …How to Reset Honeywell Thermostat. Resetting your Honeywell thermostat is a simple and painless process. Begin by pressing the reset button on the side of the thermostat, then wait for the display to clear. Next, press and hold down both the “up” and “down” buttons until all segments of the display flash twice.To reset the system's schedule, press the System button. Next, hold the blank box that's in the center of the screen. When the numbers panel comes up, enter 0165 on the left and the number one on the right. Now press Done and your thermostat should have a reset schedule.Stage 1 Thermostat Meaning. Single-stage systems use one heating and cooling output level. As such, they use single-stage thermostats. It uses two-thirds of the compressor capacity while stage two uses the full compressor. But that description of the differences between stage 1 and stage 2 thermostats won't help you unless you know what ...restarting, to prevent equipment damage. During the wait time, the message “Cool On” or “Heat On” is displayed on screen. About your new thermostat Your new Honeywell thermostat has been designed to give you many years of reliable service and easy-to-use, push-button climate control. • Backlit display on RTH2300Last updated. 2/22/22. If your doorbell isn't working, try the following steps: 1. Check batteries in the doorbell. 2. Check the batteries in the push button. 3. Check the device pairing.Step 2 – Check to See if the Thermostat or the Clock are Set. Your thermostat could go into setup mode if you had a recent power outage or no power for a while. This can cause the “cool on” indicator to keep blinking. So, if you did have a power outage, the first thing to do is check your settings.7 Problems of Honeywell HZ311 Thermostat With Troubleshooting Guide. Problem 1: Incorrect Temperature Readings. Problem 2: Connectivity Issues. Problem 3: Unresponsive Controls. Problem 4: Heating or Cooling System Not Working. Problem 5: Display or Interface Issues. Problem 6: Short Cycling. Problem 7: Sensor Problems. Honeywell home cool on blinking, Professional Contractor Support. Call the Homeowner number above and select the 'Contractor' option. Open Hours: Monday through Friday: 9am - 5:30pm CDT, If you use a touchscreen model, press the "Menu" button to access the settings. On settings, scroll through the menu to find the "Reset" or "Factory Reset" option. Once you find it, select it. Now, your thermostat should prompt you to input your password to confirm the reset. Input your correct password now., Some thermostats keep blinking the cool on message, but now you don’t have to worry about it. The Honeywell Pro series thermostat cool on flashing can be fixed differently. Keep trying these steps, and your Honeywell thermostat will start functioning like before and release all your stress by giving out the natural cool-on effect., Last updated. 2/22/22. The temporary hold setting is when you change the temperature setting to a different temperature and it stays at that setting until the next schedule change. The permanent hold setting holds the temperature setting you have chosen for an indefinite time. This overrides your scheduled settings., Different ways to secure the panel for Honeywell Thermostats. 3. Check the Batteries. One of the most common causes of issues with thermostats is the battery running out or being faulty. Honeywell thermostats are no exception. Faulty batteries could be causing your thermostat's screen to go blank and unresponsive., Ac not working, and on the thermostat in the upper right corner is is blinking cool on. - Answered by a verified HVAC Technician. We use cookies to give you the best possible experience on our website. ... We have a Honeywell home pro series model TH4210 you 2002 and we can't adjust the thermostat ..., Why is my system heating when it's set to cooling? 1. Verify the thermostat is wired correctly. 2. Make sure the thermostat is configured correctly for the heating/cooling system type. 3. Verify the wiring is connected correctly and securely to the thermostat. If the above information has been verified and the issue is still present, contact a ..., Prepare for the Summer Heat. Install the T9 Smart Thermostat and focus on the rooms of your choice by adding Smart Room Sensors to help keep your home comfortable this season. Shop seasonal deals today! Shop Now., Here’s how to fix it: Make sure the thermostat is set to the desired temperature for heating. Try to change your thermostat settings manually. This can be done by pressing the “Up” arrow. After that, press the option that says “Switch to Permanent Hold.”. Your thermostat setting will then switch by matching the outdoor temperature., Why is my Honeywell thermostat Blinking cool on. Before delving into troubleshooting steps for a Honeywell thermostat that incessantly displays “Honeywell thermostat blinking cool on,” it’s important to grasp how this particular mode functions within the thermostat’s operation., Step 1 – Set to Thermostat’s Lowest Temperature Setting. When troubleshooting your thermostat’s “cool on,” the best way to start is by setting the temperature at the lowest setting. Check to see whether the thermostat can control the temperature, and if not, try modifying the controller settings., Step 1: Check Wi-Fi Signal Strength. Weak Wi-Fi signals are the primary cause of connectivity issues in smart thermostats, so by improving the signal can make a world of difference. To see if this is the case, check the signal strength using the Wi-Fi signal bars indicator on your smartphone or smart device. If your smartphone shows low Wi-Fi ..., Specific Honeywell thermostat models display a flashing 'heat on' message when they're signaling for heat but waiting for the system to start heating. This delay, known as delay mode or time off delay, safeguards your HVAC system from short cycling. Typically, this delay mode lasts 3-5 minutes. However, extended delays might indicate an ..., The Honeywell Home thermostat in my apartment for some reason on Heat is blinking "Leave" but not turning on, I do hear a click. I temporarily put the temperature above 82 right now, and set the whole to 85 for all modes to test it. If I switch it to "On" from "Auto" it only turns on "Cool", but not on "Heat"., Message us on Twitter for help with our products. Monday through Friday: 9am to 6pm CDT Saturday and Sunday: 9am to 5pm CDT, The most common problem is that your compressor needs 5 minutes to cool down if your Honeywell thermostat is blinking “Cool On”. Otherwise, you may need to …, Due to drained batteries, the heating or cooling feature of thermostats malfunctions. Go to your thermostat's display and see the battery level. Insert the batteries of the required voltage so that your thermostat performs well. Replacing the batteries can debug the Honeywell thermostat won't switch to cool. 4., TH4110B 5-2 DAY PROGRAMMABLE THERMOSTAT Manual & Support. TH4110B1009/U, TH4110B1025/U, TH4110B1033/U, TH4110B1017/U. Download Manual Download Installation Guide. Download Service Datasheet. TH4110B 5-2 DAY PROGRAMMABLE THERMOSTAT Product Page., In today’s fast-paced world, home security has become a top priority for many homeowners. With advancements in technology, there are now various options available to ensure the saf..., Temperature settings do not change. Make sure heating and cooling temperatures are set to acceptable ranges: Heat: 40° to 90°F (4.5° to 32°C). Cool: 50° to 99°F (10° to 37°C). "Cool On" or "Heat On" is flashing. Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the ..., Typically, you will have a Honeywell thermostat flashing heat on in delay mode, but no heat coming through. If 5 minutes pass and the flashing message doesn't go away, you might need to restart your thermostat. You can do so by flipping off the power switch for 5-10 minutes and flipping it back on., The filter can improve the system's performance or cause extensive damage when clogged with a significant amount of dirt. If the Cool On indicator flashes on your Honeywell thermostat, turn the air conditioner off and inspect the filter. A clogged air filter restricts the airflow into and out of the system, causing a malfunction., The Honeywell Home TrueZONE® HZ322 Panel is used for conventional and heat pump applications up to 3 zones (2H/2C) at 24 Volts. ... Controls up to 2 Heat/2 Cool conventional or 2 Heat/1 Cool heat pump; WORKS WITH. Our products, apps and services work in harmony with leading smart home ecosystems., Honeywell Th1110D2009 Troubleshooting. 1. Check the power source to make sure it is connected and working properly. 2. Make sure all connections are secure, including any wiring that connects the thermostat to your HVAC unit or other components of your home heating/cooling system. 3., Check the Door of the Furnace. The common Honeywell thermostat problem is caused by the door on the furnace, which is not fully shut. So, you have to shut the furnace's door correctly to get the power to the thermostat back. Then, you can reset the thermostat and use it just like before. Read also: Honeywell Thermostat Vision Pro Troubleshooting., Honeywell 6000 Series: If your thermostat falls under the Honeywell 6000 Series category, make sure the thermostat is turned on. Then, press and hold the "Fan" button as well as the "Up" arrow. Hold these for about five seconds, then release them. Press the button on the bottom left until you see "39" on the display., By following the guide below, you can identify and resolve the problem, ensuring your home stays cool and comfortable during hot summer months. Page Contents. 1 Understanding Your Honeywell Thermostat; ... The Honeywell AC thermostat cool on blinking issue can be resolved through a series of troubleshooting steps. Start by inspecting the ..., Oct 15, 2022 · Sometimes, all you would have to do to get rid of the blinking ‘cool on’ message is reset the thermostat. If your thermostat has batteries, then insert those backward for 5 seconds to reset the device. To reboot other Honeywell Pro Series thermostats, you would have to: Turn the device on. Press and hold the ‘menu’ button for 5 seconds. , Is you house HVAC thermostat blinking "cool on" or "heat on" and does not turn on the furnace or air conditioner? This is most often caused because power was..., Select “Reset”. Select “Schedule Reset”. PERFORMING A HOMEKIT RESET. Press the Menu Icon. Scroll down to “Thermostat Information. Record the “Date Code”. Press the “back” arrow, then scroll down to “Installer Options”. Enter the Date Code when prompted to “Enter your password”. Select “Reset”., Power outage or any interruptions in the power cause the thermostat to automatically switch to the setup mode. This is also one of the reasons why you find your Honeywell thermostat flashing cool on. Keep an eye on the clock and review all the settings accordingly. 3. Check Whether the Batteries Are Working., Support Center. CHAT WITH A SPECIALIST Online chat. Get support for your WIFI 7-DAY PROGRAMMABLE THERMOSTAT, from installation and manuals to troubleshooting tips and replacement information., All Honeywell thermostats that have batteries store the batteries in the control panel. Locate the batteries by removing the battery compartment tray or cover or by removing the unit's faceplate. Carefully extract the batteries, and replace them. Be sure to place the batteries in the correct orientation. The battery-powered control unit of ...