Honeywell pro series flashing cool on

Honeywell thermostat cool on blinking is a very common issue for Honeywell users. If you do not know the proper troubleshooting methods, you can get tensed over something very normal, and you might even want to go for a Honeywell replacement. But there is no need for that as we wrote this troubleshooting guide hoping that it will help you solve ...

Download this manual. PRO 2000 Series. PROGRAMMABLE THERMOSTATS. TH2110DV1008, TH2210DV1006. THIS MANUAL COVERS THE. FOLLOWING MODELS: TH2110D: For 1-Heat / 1-Cool systems. TH2210D: For 2-Heat / 1-Cool heat pump systems. (Remove the thermostat from its wallplate to find the.Honeywell TH4110U2005. List of available manuals, guides and instructions for Honeywell TH4110U2005 T4 Pro programmable thermostat. User Guide. Honeywell TH4110U2005 User Guide Language: English Pages: 10. Similar Models. Honeywell CM701. Honeywell CM707. Honeywell CM721. Honeywell CM727.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.1-800-468-1502. 2. Introduction. The Honeywell T6 Pro Z-Wave Programmable Thermostat is a Z-Wave Plus certi- fied thermostat capable of controlling up to three heat and two cool stages of heat pump, (incl. dual fuel heat pump systems) and up to two heat and two cool stages of conventional system (3H/2C HP, 2H/2C Conv.)Aug 8, 2023 · 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. Operating Manual Quick reference to controls About your new thermostat Digital display (see page 5). Function Buttons Press to select the function displayed just above each button. (Functions change depending on the task.) 69-1921EFS—01 Battery holder (see page 17). Temperature Buttons Press to adjust temperature settings (see page 11-13). To determine if thermostat is the issue. remove wires from thermostat. Tie red, yellow and green together and see if unit will stay on. If so, problem is thermostat.If not we need to find what is causing the unit to shut down.It can be a pressure switch, float switch or issue with control board.

Start from the main screen of the Honeywell Home T6 Pro Smart Z-Wave Thermostat. Press the Menu button at the bottom of the screen. Then scroll right or left until you find the Z-Wave Setup option. Press the Select button to continue. Then find the option that asks the user to "put the controller into its pairing mode".I have a Honeywell home pro series, the cool on is flashing but the ac will not come on. TH411OU2005. For the last - Answered by a verified HVAC TechnicianHoneywell TH6210U2001/U T6 Pro Programmable Thermostat, 2 Heat / 1 Cool Heat Pump Or 1 Heat / 1 Cool Conventional: Amazon.com: ... Honeywell Home Large Cover Plate & Electrical Box Adaptor for T-Series Thermostats (THP2400A1080), White. $21.98 $ 21. 98. Get it as soon as Wednesday, May 1.Solutions. When Honeywell thermostat not cooling down happens, reboot the thermostat. Turn off power to the thermostat for ten to twenty seconds. Then turn it back on. This is easy with many smart models because they can detach from furnace power. Simply unsnap them from their wall plates.Page 1 Operation Manual Operation Manual... Page 2 T705 Pro1 Technologies 1111 S. Glenstone Ave., Suite 2-100 Springfield, MO 65804 Toll Free: 888-776-1427 Web: www.pro1iaq.com Hours of Operation: M-F 9AM - 6PM Eastern Table of Contents Page Caution: Table of Contents Thermostat Quick Reference Equipment damage hazard.Go to your thermostat and switch from Heating to Cooling and then feel the temperature of the air blowing from the vent. If COLD, this means your thermostat is cooling correctly, but the heating isn’t working properly. Contact Support at 1-855-733-5465 to find a pro-installer in your area.In this video I instructions for the correct and easy way to replace the two AA(double A) batteries in a Honeywell pro series T4 thermostat. When the batteri...Oct 4, 2021 · The blinking “Cool On” message on a Honeywell thermostat display indicates that the system is restarting, batteries need replacing in the control panel, or a fault with the system. If the blinking persists for more than five minutes, contact a technician to perform diagnostics. The “Cool On” indicator message on a Honeywell thermostat ...

Verify the fan setting: Set the fan setting to "Auto.". This ensures that the fan will turn on automatically when the cooling system is activated. Double-check the mode and time settings: Ensure that the thermostat is correctly programmed with the desired mode and time settings. Incorrect settings can cause the "Cool On" message to appear.WiFi Smart Thermostat Manual & Support. RTH9580WF1005/U1. Download Manual Download Installation Guide. Download Service Datasheet. WiFi Smart Thermostat Product Page.I can't get my thermostat below 68 on cool. Honeywell home pro series. First awhile just tried changing batter8 - Answered by a verified HVAC Technician. ... Can not change the temperature - display says unlock at the bottom of the display — it's a pro series Honeywell home thermostat ...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.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. 5. Clogged Air Filters Could Cause Honeywell Thermostat Blinking Cool On. 6. Dirty Coils Can Cause Honeywell Thermostat Flashing "Cool On" 7.Honeywell Thermostat Troubleshooting Guide (2024 Update) Thermostats play a crucial role in setting the indoor temperature. While there are slight deviations between models, design, ease of installation, and maintenance are usually the main factors for most customers. Honeywell is a trusted brand known for its innovative and user-friendly devices.

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If the furnace is set to heat instead of cool, it will cause the thermostat to blow hot air. Set the furnace to cool and see if that fixes the problem. If none of these solutions work, there may be a problem with the thermostat itself. Honeywell pro series cool on blinking. If your new Honeywell thermostat is blowing hot air on the cool setting ...If your Honeywell thermostat won't go above 70, it is likely due to the temperature limit setting. You can adjust this setting using the up and down arrows on your thermostat. To do this, press "Settings" and then select "System.". From there you will need to scroll down until you see "Heat/Cool Limit Set.". Once selected, use the ...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...PROA7PLUS ProSeries 7 inch All-in-One Panel. All-in-one Security system serves as a central hub for security and home automation with wireless controller, communicator, microphone, speaker and siren. Supports wide selection of sensors and devices using SiX™ two-way, wireless technology with highly secure AES-128 encryption.

A ‘cool on’ message will be flashing on your Honeywell thermostat, in case the system is in delay mode or if the batteries need to be changed; simply wait for 5 minutes or change the batteries and the …Honeywell Home PRO 1000 Series lets you control your home's heating and cooling system, giving you precise temperature management. It features an easy-to-read display, user-friendly interface, and a built-in compressor protection to prevent damage from rapid restarts. With its multiple system compatibility, you can use it for 1-heat, 1-heat/1 ...Heat and cool settings must be at least 3 degrees apart. The thermostat will automatically adjust settings to maintain this 3-degree separation (called "deadband"). The 3-degree separation between heating and cooling set temperatures is fixed, and cannot be changed. Press system button until screen displays "Auto".If COLD, this means your thermostat is cooling correctly, but the heating isn't working properly. Contact Support at 1-855-733-5465 to find a pro-installer in your area. If WARM/HOT, this means your reversing valve may not be configured or wired properly. Continue to the Thermostat Wiring section.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 compressor (see page 4).Step 3 - Register with Honeywell / resideo. (Performed in the My Total Connect Comfort web portal) *Registration cannot be performed with the mobile app, currently only supported via the web portal* Step 1 - Connecting your mobile device to the thermostat's WiFi network (NewThermostatxxxxxx)Honeywell Home Pro Series Model TH6220WF2006. 2 YEARS OLD. 1 of 2 units has a blank screen, other working. I am trying to read comments on same issue with same model herein. ... I have a honeywell pro th4000 series system. the cool on indicator is flashing. I have followed the instructions in the operating manual, however, it still …Confirm you have a C wire in the C terminal. If your previous thermostat did not use a C wire, it's unlikely that it is connected at the equipment. Verify the C wire is connected to the C terminal in your furnace or air handler. Check your jumper selector switch. If you have a wire in the R terminal and no wire in the RC terminal, verify the ... 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. 2/22/22. If your thermostat is newly installed and the heat pump worked for cooling with the previous thermostat, check the following: 1. Verify that the thermostat is set to cool and is calling for cooling, usually indicated by the words "cool on," a snowflake icon, or a shimmering snowflake icon. If the room temperature is below the cool set ...So, what does it mean when your Honeywell thermostat is blinking “Cool On”? The “Cool On” message will appear on your Honeywell thermostat if the batteries are dying or there is faulty wiring. Your Honeywell thermostat can also display “Cool On” if your AC needs to give your compressor a 5 minute cooldown time to protect it.

Make sure power switch at heating & cooling system is on. Make sure furnace door is closed securely. Wait 5 minutes for the system to respond. 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). Compressor protection feature is engaged.

It is going through the flashing cool down period now, that protects the compressor. Home Improvement Expert: David Bowden , replied 4 years ago Also note there is most likely a 5-7 min delay with the compressor.View and Download Honeywell T10 Pro Smart user manual online. with RedLINK. T10 Pro Smart thermostat pdf manual download. ... Thermostat honeywell pro Series Professional Install Manual. Smart thermostat (45 pages) ... 40 °F to 90 °F (4.5 °C to 32.0 °C) This device complies with part 15 of the FCC Rules. Operation • Cool: 50 °F to 99 °F ...To do this, find the various schedules on the display on your thermostat. Press the set button to get past the time and day. When you get to a scheduled time you want to cancel, press the hold button for about 5 seconds. Once the numbers on your screen changes to zero, press "Set" to lock in the changes.In this video I instructions for the correct and easy way to replace the two AA(double A) batteries in a Honeywell pro series T4 thermostat. When the batteri...To factory reset this thermostat, first press the System button. Now you must press and hold the blank box that's in the center of the screen. When the number panel is displayed, set the number on the left to 0710 and the number on the right to one. Once this is done, press the Done button.Apr 3, 2014 ... Troubleshooting Honeywell Zone Board Brand new install on new construction and a home inspector said the compressor wouldn't run.Sometimes, you might see the reading on the screen is blinking heat on. Generally, the Honeywell thermostat blinks for protection purposes. A blinking heat on signal indicates that a safety timer’s tripping that will protect the compressor of your thermostat. Sometimes, it might indicate a low battery.When your thermostat display says "Cool On," this is an operation mode that's controlled by your thermostat. When you see this cooling message, it essentially means your AC unit is working to pump cool air into your home.

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In that case, you'll just have to set the temperature, and then press the key under "Hold" to activate the "Temporary Hold" feature. Again, depending on what model Honeywell thermostat you're using, the steps you should take may vary. For example, the latest programmable thermostat Honeywell, the Honeywell ZStat Z-Wave Thermostat ...1.6K. 149K views 4 years ago. Honeywell thermostat says "cool on" blinking or "heat on" flashing, but not working after changing batteries. Thermostat …4000. Series. Programmable Digital Thermostat. User Guide. Read and save these instructions. Your new thermostat is pre-programmed. Just set the time and day. For help please visit yourhome.honeywell.com Press to set desired temperature. Note: Set SYSTEMswitch to the system you want to control (Heat or Cool).Reason 1: Incorrect Temperature Setting. When your thermostat displays “Heat On” but doesn’t produce warmth, it’s often because the temperature setting isn’t above the room’s current temperature. This causes the heating system to remain idle, despite the thermostat’s indication. The thermostat’s primary function is to maintain ...Honeywell YRTH series thermostat troubleshooting. Display is blank. Make sure fresh AA alkaline batteries are properly installed. Cannot change system setting to Cool. Check Function 0170: System Type to make sure it is set to match your heating and cooling equipment. Fan does not turn on when heat is required.Make sure power switch for heating & cooling system is on. Make sure furnace door is closed securely. Wait 5 minutes for the system to respond. Temperature settings do not change. If you are in the correct mode, but you cannot set the heat from 32 °F to 90 °F (0 °C to 32 °C), or set the cool from 50 °F to 99 °F (10 °C to 37 °C), you may ...Testing a Honeywell Thermostat. If the thermostat LED is lit, do a test by turning the thermostat to its maximum setting (in HEAT mode) or minimum setting (in COOL mode), turning the main control to AUTO or FAN and waiting for the blower to start. If it doesn't, remove the thermostat cover and check the wiring.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.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 ...To factory reset this thermostat, first press the System button. Now you must press and hold the blank box that's in the center of the screen. When the number panel is displayed, set the number on the left to 0710 and the number on the right to one. Once this is done, press the Done button. The blinking "Cool On" means the cool cycle is in delay (5 minute by default). If it's continually blinking then either the thermostat is bad, or there's a short in the low voltage wiring that's causing it to reset everytime it tries to come back on (basically resetting itself over and over). 2. Reply. Effective-Brush9301. ….

Disconnect all the wires connected to the thermostat. Make sure you don't mix them up while reconnecting. Remove the device from the wall plate. Remove the batteries and wait for five minutes. Replace the batteries and reconnect the wires. Turn on the system and wait for five minutes.Feb 16, 2023 · 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. PROA7PLUS ProSeries 7 inch All-in-One Panel. All-in-one Security system serves as a central hub for security and home automation with wireless controller, communicator, microphone, speaker and siren. Supports wide selection of sensors and devices using SiX™ two-way, wireless technology with highly secure AES-128 encryption.In this video I instructions for the correct and easy way to replace the two AA(double A) batteries in a Honeywell pro series T4 thermostat. When the batteri...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 ...Fix 1: Check if the batteries were installed correctly. Fix 2: Change the batteries! Fix 3: Reset honeywell thermostat after replacing batteries. Other fixes. Inspect the thermostat- something may have gone wrong! Shut the access door (on the furnace) correctly. Reset the circuit breaker/replace the fuse. Replace the Thermostat.In our fast-paced, technology-driven world, phone calls need to be answered as quickly as possible. In some situations, you cannot hear your phone ring and may miss a call. By sett...I have a Honeywell home pro series, the cool on is flashing but the ac will not come on. TH411OU2005. For the last - Answered by a verified HVAC TechnicianLast updated. 8/29/22. Why is my thermostat display showing “wait,” “waiting for equipment,” or flashing “cool on”? Each thermostat model has a different display message when a delay occurs. This delay can be up to five minutes under normal operating conditions.Heath : To get into the menu press and holf the up arrow and the fan button untill the display changes. Then press the next button until you get to option 15 and on the right side will be a 5 that is the 5 minute delay. Use the up and down arrows to change the 5 to 1 if you want the comprete.r delay to be 1 minu. Honeywell pro series flashing cool on, If your Honeywell Thermostat is flashing 'Cool On' , set the temperature to the lowest setting. Then reset your Honeywell Thermostat. I've also gone into detail about checking your batteries, AC filters, AC coils, and the User manual. Demystifying the 'Cool On' Indicator., Part of the Honeywell Home T Series of thermostats from Resideo, the T4 Pro Programmable Thermostat helps you manage your home heating and cooling in a simple, easy to use device. Designed to streamline everything from installation to user experience, the T4 features push button control and seven-day scheduling, including an option to set a ..., The blinking "Cool On" means the cool cycle is in delay (5 minute by default). If it's continually blinking then either the thermostat is bad, or there's a short in the low voltage wiring that's causing it to reset everytime it tries to come back on (basically resetting itself over and over). 2. Reply. Effective-Brush9301. , Honeywell Home PRO 1000 Series lets you control your home's heating and cooling system, giving you precise temperature management. It features an easy-to-read display, user-friendly interface, and a built-in compressor protection to prevent damage from rapid restarts. With its multiple system compatibility, you can use it for 1-heat, 1-heat/1 ..., 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. , Press the 'Up" or "Down" arrows until the right side of the screen changes from 1 to 0. Select "Done." Allow two minutes for "WiFi Set-up" to appear on the thermostat screen. On your mobile device, turn on Airplane mode, turn on WiFi, then select and connect to the "New Thermostat xxxxxx" network., Please try again. Check the name or model number of your product to ensure it's correctly written in the search bar above. If you're looking for a product that isn't a thermostat, try checking here., Low Batteries. A blinking “Cool On” message can appear due to dying batteries, a power surge, or a power outage. Thermostat batteries last for an average of 10 months, so it is easy to tell when dead batteries are the culprit. Sometimes, a Honeywell thermostat can bounce back after a power outage without requiring a reset., The screen shows cool on- solid not blinking. Fan on is displayed temperature is - Answered by a verified HVAC Technician. We use cookies to give you the best possible experience on our website. ... I have a honeywell pro th4000 series system. the cool on indicator is flashing. I have followed the instructions in the operating manual, however ..., You might see your Honeywell thermostat that says that the heat is on, and yet you get no heat. This can happen for many reasons. A broken thermostat, incorrect wiring, tripped circuit breakers, blown fuses, or a broken HVAC system could cause this. Here, we describe some of these causes, and then offer troubleshooting techniques and repair ..., 1-800-468-1502. Introduction. The Honeywell T6 Pro Z-Wave Programmable Thermostat is a Z-Wave Plus certified thermo-stat capable of controlling up to three heat and two cool stages of heat pump, (incl. dual fuel heat pump systems) and up to two heat and two cool stages of conventional system (3H/2C HP, 2H/2C Conv.), Browse Honeywell Home's library of thermostat support resources and helpful guides. ... Pro 2000 Horizontal Programmable Thermostat Support; T6 Pro Smart Thermostat Support; T5/T5+ Smart Thermostat Support; Smart Home Partners REGISTER YOUR PRODUCT. OFFERS toggle menu., The screen shows cool on- solid not blinking. Fan on is displayed temperature is - Answered by a verified HVAC Technician. We use cookies to give you the best possible experience on our website. ... I have a honeywell pro th4000 series system. the cool on indicator is flashing. I have followed the instructions in the operating manual, however ..., Go to your thermostat and switch from Heating to Cooling and then feel the temperature of the air blowing from the vent. If COLD, this means your thermostat is cooling correctly, but the heating isn’t working properly. Contact Support at 1-855-733-5465 to find a pro-installer in your area., View and Download Honeywell PRO TH3000 Series operating manual online. ... inside temperature Temperature setting Inside Set To Em Aux Replace Batt Low battery warning If "Heat On" or "Cool Heat On (see page 9) On" is flashing, com- pressor protection is engaged (see page 8). ... (Heat/Cool) PRO TH3110D / TH3210D System switch The ..., If you see a cool on blinking on your thermostat it means that there is fault in the thermostat wiring or the battery is dying. The Cool On message also appears on screen when AC gives a 5 minutes cooldown time to the compressor or if blower motor is not working properly. A dirty Air Filter can also be the reason for cool on blinking on thermostat., We would like to show you a description here but the site won’t allow us., So, what does it mean when your Honeywell thermostat is blinking “Cool On”? The “Cool On” message will appear on your Honeywell thermostat if the batteries are dying or there is faulty wiring. Your Honeywell thermostat can also display “Cool On” if your AC needs to give your compressor a 5 minute cooldown time to protect it., The thermostat's Lyric Honeywell T6 Pro Series Smart Programmable Thermostat has auto-changeover. Based on the room temperature and the heating and cooling set points, the thermostat can switch between heating and cooling as needed. If your thermostat does not have "auto" as an option, it has not been set up for auto-changeover., Low Batteries. A blinking “Cool On” message can appear due to dying batteries, a power surge, or a power outage. Thermostat batteries last for an average of 10 months, so it is easy to tell when dead batteries are the culprit. Sometimes, a Honeywell thermostat can bounce back after a power outage without requiring a reset., Jan 16, 2022 · Honeywell “cool on” blinking is basically an indicator that tells that the thermostat is under operational mode to cool the temperature. It takes around 5-7 minutes to completely operate. Just leave your thermostat for a couple of minutes and cool on flashing on thermostat would automatically go away. , The PRO 3000 series non-programmable digital thermostat has 2 heat/1 cool stage for heat pump systems. ... PRO 3000 Series 2 Heat/1 Cool Non-Programmable Digital Thermostat ... Honeywell Home: Built In Wi-Fi: No: Change/Check Reminders: No: Country of Origin: MEX:, The T1 Pro Non-Programmable Thermostat comes with the standard UWP mounting system. The soft key controls (with a 2.37 sq. in. display) and the easy-to-read LED back light make this thermostat from Resideo one of the best choices in temperature control on the market. SELECT A MODEL: T1 Pro Non-Programmable Thermostat - 24 Vac., System Mode Settings. 1) Get to the Home Screen This is an easy one, press the Home button and you're there. This will be your hub to navigate the rest of your options. 2) Select your System Mode Press the Mode button to cycle through the Heat, Cool, and Off modes until the one you want is displayed., 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..., Verify that the thermostat is switched to cool mode and has a cooling set point below the room temperature reading. Check the thermostat display for cooling, …, On my Honeywell Home Pro Series thermostat there 3 things going on. 1. Cool on is flashing in top left corner. 2. A triangle is light in middle of top of display. 3. Top right corner by Wi-fi there is … read more, Whether it’s an older analog model or one of the newer Wi-Fi-enabled smart Honeywell pro series with internet connectivity and remote access capabilities, many common Honeywell thermostat problems can be fixed with some easy DIY troubleshooting. In ... Related Article: Honeywell Thermostat Cool on Blinking. Rate this post., 2/22/22. The thermostat has a feature called Adaptive Intelligent Recovery (AIR) or Smart Response or Early Start. This allows the thermostat to "learn" how long the heating and cooling system will take to reach the programmed temperature settings. So the temperature is reached at the time you set. For example: Set the Wake time to 6am, and the ..., Return mode starts flashing whenever the Honeywell thermostat is preparing in advance for the "Return" or "Home" schedule periods. ... PRO 4000 and RTH 2300 Series. Programmable thermostats. Schedule Mode: 5+2; ... 10 Steps to Fix a Honeywell Thermostat Flashing Cool On or Heat On. Disclaimer: You are responsible for your own safety. ..., If the Honeywell Thermostat says "Cool On", set the temperature to the absolute lowest setting. After that, just re-install the Honeywell software and see if that changes anything. Tech Support 24/7. Ask an Appliance Repairman Online. Connect with the Expert via email, text or phone. Include photos, documents, and more., 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 ... , 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”.