Honeywell thermostat pro series cool on flashing

The fan symbol on a Honeywell thermostat represents the fan mode. It indicates whether the fan is set to "auto" or "on" mode. If the fan symbol is illuminated, it means that the fan is set to the "on" mode and will run continuously, even when the temperature is not being regulated. If the fan symbol is not illuminated, it means that ...

Honeywell thermostat blinking "cool on" - Answered by a verified HVAC Technician. We use cookies to give you the best possible experience on our website. ... I wanted to upgrade to a focus pro th6110D1005 programmable t-stat. When I installed the th6110d & even though it was set at the same temp as my Digital Round ...4. If you installed the thermostat yourself, verify that the thermostat is correctly configured to control a heat pump. The installation instructions for your thermostat show these settings. 5. If the heat pump runs in cool mode with a call for heat, verify that the configuration setting for the changeover is set correctly for your system.View and Download Honeywell Home T4 Pro Series manual online. Programmable Thermostat. T4 Pro Series thermostat pdf manual download. Also for: Th4110u2005, Th4210u2002. ... Press Select to enter System Test. 3 Use to change between Heat, Cool, Fan, Em. Page 18: Troubleshooting Troubleshooting If you have difficulty with your thermostat, please ...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 moreAn improperly installed thermostat can result in various issues, including a blinking cool indicator without the cooling system functioning. Troubleshooting Steps. When your Honeywell thermostat is blinking cool on but not working, it can be frustrating. However, you can take several troubleshooting steps to try and resolve the issue.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.To reset your Honeywell t4 Pro thermostat, follow these steps: 1. Locate the “MENU” button on the thermostat. 2. Press and hold the “MENU” button until the screen changes. 3. Navigate to “RESET” using the arrow buttons. 4. Select “RESET” and confirm the reset by pressing “YES” when prompted.Honeywell Home TH1210DH1001 - PRO 1000 Horizontal Non-Programmable Thermostats (2 Heat/1 Cool)- Overview: The PRO non-programmable family of thermostats provides basic and simple operation with specific models for conventional and heat pump systems. Features: Non-programmable digital thermostat. Easy-to-read backlit display - easy to read in various lighting conditions.

If your Honeywell Thermostat Vision Pro 8000 is having trouble, there are a few things you can do to troubleshoot the issue. First, check the batteries. If the batteries are low, they may need to be replaced. If the batteries are fine, then check the thermostat's settings. Make sure the thermostat is set to the correct mode (heating, cooling ...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.View and Download Honeywell Home T3 Pro user manual online. T3 Pro thermostat pdf manual download. Also for: Th3110u2008, Th3210u2004, Th3210u2004/u, Th3110u2008/u. ... (Heat, Off, Cool) or Fan. settings options. Table of Contents ... Thermostat Honeywell Home T6 Pro Series Installation Instructions ManualThe Honeywell AC thermostat cool on blinking issue can be resolved through a series of troubleshooting steps. Start by inspecting the thermostat wiring for any potential issues. ... To troubleshoot the issue of the Honeywell AC thermostat cool on blinking, you can follow these steps. First, check if there is any debris blocking the air vents ...1 Common Issues With Honeywell Pro Series Thermostats. 1.1 Thermostat Not Working. 1.2 Blank Screen Or Unresponsive. 1.3 Thermostat Not Heating Up. 2 Troubleshooting Solutions. 2.1 Check Power Source And Batteries. 2.2 Inspect Circuit Breaker. 2.3 Ensure Indoor Unit Doors Are Closed. 2.4 Restart The Thermostat.

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 ...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. ...PRO 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 SYSTEM switch to the system you want to control (Heat or Cool). Fan Switch is used to control your ...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 SupportSecond Opinion] Trying to replace a Honewell thermostat (honeywell th3110d1008) with a new Honeywell T9 Smart one. Old thermostat was cooling only, R, G, Y wires, no C wire (batteries). Jumper between …

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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.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.To make life easy, we've pulled together a list of the top Honeywell thermostat instruction manuals to get you back up and running! Note: Updated May 2023 with manuals for the latest Honeywell Thermostat models RTH8800WF2022 & RTH9600WF along with a few others that were missing from our list. Show Table of Contents.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.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.

Contents hide 1 Honeywell Home T6 Pro Wi-Fi Programmable Thermostat 2 Thermostat Features 3 Thermostat overview 3.1 Resideo App overview 4 Adjusting the temperature 5 Schedule overrides 5.1 Adjusting the temperature in Auto mode 5.2 Selecting system mode 5.3 Setting the fan 6 Connecting to a WiFi network 6.1 Disconnecting and reconnecting to a WiFi […]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 ...Resetting your T5 Thermostat is an easy process that can be done in a few simple steps. First, locate the reset button on the thermostat. This will usually be located near the face of the thermostat or somewhere along its sides. Once you have identified this button, press and hold it for 10 seconds until you hear a clicking sound.A programmable thermostat saves energy by automatically raising and lowering the temperature of your home while you’re away. Watch this video to learn more. Expert Advice On Improv...If you’re looking for a way to reduce your energy bills and increase the efficiency of your home, look no further than the Honeywell Pro Series thermostat. One of the key features ...POPULAR VIDEOS. How to properly remove an old thermostat for replacement. Modal 1. How to Install A Honeywell Home T3, T4, T5, T6, and T9 Thermostat (Video) Modal 1. How to enter and navigate advanced programming on the T6 Pro thermostat. Modal 1. How to program schedules on the T6 Pro thermostat. Modal 1. 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.Try Resetting the Thermostat to Factory Settings. 1. Honeywell Lyric Y Family. You must press the reset button and wait for 5-10 seconds, later release the button. 2. Honeywell 4000/6000/8000. Press and hold the “Reset” button for 5-10 seconds. Release the “Reset” button. 3.

Honeywell Home TH2110DH1002 - PRO 2000 Horizontal Programmable Thermostat (1 Heat/1 Cool)- Overview: The PRO programmable family of thermostats provides basic and simple programming with specific models for conventional and heat pump systems. Features: Weekday/Weekend programming - 5-2 (Weekdays, Weekend) programming. ... 70 Series Programmable ...

SKU: TH8321WF1001/U. 2.9. |. 20 out of 71 (28%) reviewers recommend this product. With a large touchscreen display, the VisionPRO® 8000 WiFi Programmable Thermostat makes it easy to control your home comfort. Program a schedule for every day of the week or adjust the temperature remotely anytime from the Total Connect Comfort app.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...The 'Cool On' blinking or flashing on your thermostat safeguards your HVAC system. This indicator activates a five-minute delay to protect the outdoor compressor from damage caused by turning on and off too quickly. This delay feature, especially common in Honeywell thermostats, prevents the compressor from short cycling, which can lead to ...If you see Honeywell thermostat flashing cool on, give it a time, around 15 to 20 minutes. Just turn everything off and wait. After the minute has passed, try to turn it on again. If nothing happens, contact the manufacturer’s customer service. But if the system works again, you know that you only need to give it time.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.Aug 4, 2023 · 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 ... Sep 15, 2023 · Steps To Troubleshoot Issues With ‘Cool On’: Honeywell Thermostat. The ‘Cool On’ indicator flashing on your Honeywell thermostat should normally resolve itself within 5 minutes. However, if that does not happen, you can use the steps below to troubleshoot the issue and resolve the problem. Set Thermostat To Lowest Temperature Setting Nov 12, 2019 · Honeywell thermostat says "cool on" blinking or "heat on" flashing, but not working after changing batteries. Thermostat blinks Cool On or Heat On is a safet... This Honeywell Home PRO 3000 Non-Programmable Thermostat from Resideo offers basic operation such as a slide switch for selecting heat, cool, or operate the fan. The backlit digital display makes temperature and settings easier to read in various lighting conditions. SELECT A MODEL: PRO 3000 1 Heat/1 Cool Non-Programmable Digital Thermostat.

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The Honeywell AC thermostat Cool On blinking indicator could be due to faulty wiring connections. These connections may cause improper communication between the thermostat and the cooling system. ... If your Honeywell Pro Series thermostat fan won't turn off, check the fan limit switch for any obstructions, dirt, or defects. Clean or replace ...Remove your thermostat from the wall, and open the battery holder on the side of your thermostat. Remove the old batteries and clean the inside of the holder. Insert the fresh set of batteries and close the battery holder. Remount the Honeywell thermostat on the wall again. Ensure that it clicks into position.I have a honeywell home pro series. The year is flashing in top of screen select is at bottom but none of the buttons - Answered by a verified HVAC Technician ... fan on and off for cool or. ... 16,422 satisfied customers. My Honeywell Home Pro Series Thermostat is locked. I have. My Honeywell Home Pro Series Thermostat is locked. I have tried ...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. 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 ... Nov 12, 2019 · Honeywell thermostat says "cool on" blinking or "heat on" flashing, but not working after changing batteries. Thermostat blinks Cool On or Heat On is a safet... If your Honeywell thermostat won't stop flashing 'Cool On', follow these steps to troubleshoot: Reset the Thermostat: First, try resetting the thermostat. This can often resolve any minor technical glitches. Check the Wiring: Check the wiring between the thermostat and your HVAC system for any visible damage.Page 8 Operating Manual Select the fan setting Set the FAN switch to Auto or On. In "Auto" mode (the most commonly used setting), the fan runs only when the heat- ing or cooling system is on. Cool If set to "On," the fan runs continuously. E.M. Page 9 PRO 1000 About your new thermostat Adjust the temperature Press s or t to adjust the ... Cool on flashing is usually a time delay before starting the compressor. Yup, it stops flashing once time delay is over and unit is running. Turn the unit off, hose the coil of the outdoor then turn it back on. If it still doesn't work call a technician. Listen to this guy. Turn on the power to the system and the thermostat by flipping the circuit breaker or the disconnect switch to the ON position. Check the thermostat and the system and see if they work properly. Make sure the thermostat is set to the correct mode and temperature and the system is not flashing heat on anymore.Wait 5-10 minutes. Your thermostat could be facing a slight delay in restarting and activating …We already explored the possible causes of your Honeywell thermostat blowing cold air during the heat setting, Now let's proceed with a comprehensive step-by-step troubleshooting guide to help you pinpoint and resolve the issue: 1. Check Temperature Setting. - Verify that your thermostat is set to the desired temperature in heat mode. ….

The blinking cool on your Honeywell thermostat indicates a potential issue with the cooling system, such as low refrigerant or a faulty compressor. Why Is My Honeywell Thermostat Showing A Blinking Cool But No Ac? If your Honeywell thermostat is showing a blinking cool but no AC, it could be due to a problem with the cooling system’s ...Jun 19, 2023 · Not all thermostats have this feature, so check your manual to see if yours does. If not, your problem could be something else. Solution: If you have a battery tester, take out your batteries and test them. Replace if necessary. If not, replace them anyway and see if that stops your thermostat from blinking. 3. 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. Why is My Honeywell Thermostat Flashing Cool On? When your Honeywell thermostat displays “Cool On,” it indicates that your cooling system is activated, even though you …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 ...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 …5/2-day programmable thermostats. 5/2 thermostats let you create two different schedules: one for the weekdays and one for the weekends. 🏆 Our pick: Honeywell RTH2300B. Honeywell programmable thermostats without Wi-Fi or smart features usually retail for about $50-70. Programmable thermostats are ideal for:If you need to reset your Honeywell Home Pro Series thermostat, the process is quite simple. First, locate the control panel on the front of your thermostat and press down firmly for at least 3 seconds until all buttons appear on the display screen. Once they do, look for a button labeled “Reset” or “System Reset” and press it once to ...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 by flipping the circuit breaker back on. After replacing the battery, wait for a few minutes to see if the low battery warning message or symbol disappears. Honeywell thermostat pro series cool on flashing, The T4 Pro Programmable Thermostat is easy to install with on-screen menus to display installation steps and a universal mounting system. It's even easier to use with simple push button controls, allowing you to adjust the temperature or set a heating and cooling schedule. Adaptive Intelligent Recovery. Over time, the T4 Pro Programmable ..., Hold Run. Press the SET button, then press s or t to set the clock time. Press the SET button, then press s or t to select the day of the week. Press RUN to save & exit. M33598 Note: If the clock flashes, the thermostat will follow your settings for the Monday "Wake" time period until you reset the time and day., 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., 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, Page 10: Thermostat Mounting. Thermostat mounting 1.Push excess wire back into the wall opening. 2. Close the UWP door. It should remain closed without bulging. 3. Align the UWP with the thermostat, and push gently until the thermostat snaps in place. 4. Turn the power on at the breaker box or switch., How to lock Honeywell 6000 thermostat. Go to “Up” and “Down” buttons to the right of the LCD display on your Honeywell thermostat. Tap “Up” and “Down” until you get to the desired temperature on the display. Press the button beneath “Hold” on the LCD display. “Permanent Hold” will appear on the screen. Your thermostat is ..., 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., Read More Honeywell AC Thermostat Cool On Blinking: Troubleshooting Solutions. Thermostat Solutions. Honeywell Pro Series Thermostat Fan Won't Turn Off: Troubleshooting Tips. By Emma 09/26/2023. If your Honeywell Pro Series thermostat fan won't turn off, check the fan limit switch for any obstructions, dirt, or defects. Clean or replace the ..., 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., View and Download Honeywell Home T4 Pro Series manual online. Programmable Thermostat. T4 Pro Series thermostat pdf manual download. Also for: Th4110u2005, Th4210u2002. ... Wiring diagrams 1 Stage Heat Only: Gas or Oil Furnace 1 Stage Cool Only COMPATIBLE MODELS: COMPATIBLE MODELS: TH4110U2005 TH4110U2005 …, Page 1: Thermostat Controls. Digital Thermostat FocusPRO ® 5000 Product Information Series Thermostat controls Display screen Low battery Auxiliary heat (Only Temperature warning for heat pumps with setting auxiliary heat) Current inside System temperature Heat Replace Status Inside Battery holder Setting Battery Cool On: Temperature buttons ..., Why is the "Cool On," "Heat On," "Snowflake," or "Flame" blinking on the thermostat display? Last updated. 2/22/22. The thermostat has a built-in 5 minute delay to protect your equipment. If "wait" is in the screen or "cool on" is flashing - wait 5 minutes for the system to safely respond., 2) You have a conventional heating system. Another reason a honeywell thermostat will not display the cool option is that you don’t have a cooling system such as an air conditioner or a heat pump. Be sure that you have an air conditioner. You can try setting your thermostat to defrost and check if the condenser unit will engage., 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, 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.), The Honeywell thermostat in your house will act as the HVAC system’s control panel. It detects the surrounding temperature and sends signals to the HVAC system to give you the desired temperature when you set it. The COOL ON indicator blinking is usual if that is only for 4-5 minutes. But more than 5 minutes is abnormal., 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 ..., Blinking “cool on” and no cold air being. 2 year old house, Pro series. Just today. 80 in the house. Replaced - Answered by a verified HVAC Technician, 3. Thermostat not set to “Cooling Mode” This is another possible problem that most DIY-ers can usually troubleshoot and fix themselves. The possible problem. Your Honeywell thermostat can be set to a specific mode. If it is not in the “Cooling Mode” your thermostat will not turn on the air conditioner., Wait at least 10 seconds and put the batteries inside the thermostat device in correct order. No need to push any button or do anything to reset the device. Turning it on after changing the batteries will bring it to the default setting. Once you reset the device, it will fix the "cool on" issue as well., If you own a Honeywell Home Pro Series, it’s important to familiarize yourself with the user manual. The manual provides detailed instructions on how to set up and operate your dev..., PRO 1000 Series Non-Programmable Thermostat 69-2798EFS-01. Read and save these instructions. ... When "Heat On" or "Cool On" is flashing, compressor protection is engaged (see page 8). ... Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and ..., T6 Pro Thermostat UWP Mounting System Honeywell Standard Installation Adapter (J-box adapter) Honeywell Decorative Cover Plate Small; size 4 49/64 in x 4 49/64 in x ... Cool On or Heat On is flashing Compressor protection feature is engaged. Wait 5 minutes, Nov 12, 2019 · Honeywell thermostat says "cool on" blinking or "heat on" flashing, but not working after changing batteries. Thermostat blinks Cool On or Heat On is a safet... , Need help with your Honeywell T4 Pro Thermostat? Sierra Air Conditioning & Heating has a quick, yet comprehensive tutorial showing you how to set up your the..., My honeywell t4 pro series has a flashing "cool on" and I have used all of the suggestions and still the - Answered by a verified Home Improvement Expert. We use cookies to give you the best possible experience on our website. ... We have a CM907 Honeywell Thermostat, have only been in this house for 6 months and the display is only partial. I ..., How do I switch my TH1110D2009, TH1010D2000 between heating and cooling? Last updated. 2/25/22. Pressing the Menu button will cause the Mode and Fan menus to appear. Press Mode (-) to cycle through the available modes. Please note the TH1010D2000 will only have the options of heating or cooling and off., Make sure that your Honeywell thermostat is set to “cool” mode, and that the fan setting is on “auto”. Set the thermostat to the lowest temperature reading possible. Once it’s been left to do its thing, check to see if anything has kicked in or if there’s a change in temperature in your home., If your thermostat has been flashing “cool on” for several minutes and no cool air is coming out, check your thermostat’s settings. A recent power outage could have triggered the thermostat’s “set-up mode,” explaining the blinking message. If it is in set-up mode, change it back to the correct setting. You can go through the ..., It's brand new pro series. Contractor's Assistant: How long has this been going on with your Honeywell thermostat? What have you tried so far? We just moved in last night so, 12 hours. I hit the menu button and it took me thru heat cool, etc and when I hit the down button it won't go lower than 72 on temp. It's set on cool, Honeywell Home Pro Series Model TH6220WF2006. 2 YEARS OLD. 1 of 2 units has a blank screen, other working. ... Cool on indicator flashing on Honeywell thermostat. 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 keeps flashing., From https://www.justanswer.com/ythiJACUSTOMER-63s3by4n-: HVAC Technician: I have a honeywell pro th4000 series system.JACUSTOMER-63s3by4n-: HVAC Technician:..., Honeywell FocusPRO 5000 With Auto changeover (heat/cool) Auto Changeover is a feature used in climates where both air conditioning and heating are used on the same day. When the system is set to Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature. Heat and cool settings must be at least 3 degrees apart.