Honeywell pro series flashing cool on

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.

If the sensor status light starts flashing red, this means the battery charge is critically low, with only 2-3 weeks of use remaining. ... This series covers models Focus Pro, TH5110D, TH5320U & TH5220D. ... 1000 & 2000 Series. Honeywell 1000 and 2000 series thermostats are popular among those who are on a budget. These two series are widely ...So, when your Honeywell thermostat is in the blinking stage, it shows Cool-On for more than 5 minutes – But there is a feeling that the surrounding area is not cooling down, there is no cool air coming through the system either; you might need to fix the problem.CHARLOTTE, N.C., March 24, 2023 /PRNewswire/ -- Honeywell (NASDAQ: HON) today announced that Mike Madsen, president and chief executive officer of... CHARLOTTE, N.C., March 24, 202...Thermostat Honeywell programmable , Wi-Fi Day Programmable Thermostat , 5-2 Day Programmable Thermostat with Digital Backlit Display. Home; honeywell pro series cool on blinking. Thermostat Honeywell programmable. ... Honeywell TH3110D1008 Pro Non-Programmable Digital Thermostat. Related searches. middle part low bun;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 …

Hello I have a Honeywell T4 Pro that was flashing "Cool On" on the right side of the screen. Nothing seems to help I did replace the batteries and it stopped blinking and now it is solid "Cool On" When I run the test it does kick the AC on. So the AC itself is fine. It seems like it is something with the thermostat. It has fresh batteries.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...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 ...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.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 TechnicianCheck the circuit breaker to your equipment. Confirm the thermostat is set to Cool mode and the setpoint (the smaller number at the top of the thermostat display), is set to a temperature lower than the display temp (the larger number in the center of the display). Confirm the message "Cool On" is solid (not flashing) on the thermostat display.To set up a weekly schedule on your Honeywell Home Pro Series thermostat, follow these steps: Press the Menu button. Select Schedule. Select the day of the week that you want to program. Select the time period that you want to program. Set the desired temperature. Repeat steps 4 and 5 for each time period that you want to program.

Check if the thermostat is set to “Heat” mode and if the “Heat On” button is blinking. This means that a safety timer for your thermostat’s compressor has been tripped. Once this stops the heat blinking, your thermostat should be able to maintain its heat setting again. The 4-5 minute blinking is the time delay.Jul 31, 2022 · 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... Crank thermostat down to the lowest temperature. The first step is to determine if your system is cooling at all and if it can control it. To check this, turn down your thermostat to its coldest setting. After setting it to the minimum temp, double-check the mode is set to ‘Cool.’. Also, make sure the fan setting is set to ‘Auto.’.Use the up and down buttons on your Honeywell thermostat to adjust the temperature to warmer or cooler. Try not to go below 68 degrees if you are trying to set the temperature to be cooler than 70 degrees. Between 65 and 68 degrees is where you start to run the risk of frozen coils, short circuits and overheating.. The limiting menu will allow you to adjust the high-temperature limit and cool ...La boîte comprend : Thermostat T4 Pro. Système de montage UWPTM. Adaptateur d’installation standard Honeywell (adaptateur boîtier de raccordement) Plaque de couvercle décorative Honeywell – Petite; dimension 4-49/64 po x 4-49/64 po x 11/32 po (121 mm x 121 mm x 9 mm) Vis et chevilles. 2 piles AA.

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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 ...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 ...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 Technician ... We noticed that our A/C wasn't working and checked our Honeywell Pro Series model TH411OU2005 Thermostat. The Cool On was flashing and didn't stop flashing. What …This 7-Day Programmable Honeywell Home Thermostat is easy to install and operate, and has essential features for comfort and energy savings. ... Pro 2000 Horizontal Programmable Thermostat Support; ... Owners Manual for RTH2510B, RTH2410B Series Programmable Thermostat (English, French) View Resource: Owners Manual for RTH2510B, RTH2410B Series ...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. 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.

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...HONEYWELL PRO 4000 SERIES PROGRAMABLE DIGITAL. ... caused when I try to switch fro heat to cool the unit outside works but, it does not blow any air from the vents. ... Hello, I have the Honeywell Vision PRO Th8320u 1008 series. The low battery light was blinking, I changed the batteries now it will not the thermostat will not work. ...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.Find out how to properly install metal roof flashing around a chimney. Expert Advice On Improving Your Home Videos Latest View All Guides Latest View All Radio Show Latest View All...POPULAR VIDEOS. How to properly remove an old thermostat for replacement. Modal 1. How to properly mount and wire the sub-base for the Honeywell Home RTH221B thermostat - Resideo. Modal 1.If you see that your Honeywell thermostat is flashing "cool on" don't worry, this is a safety feature within the thermostat that prevents possible damage to the compressor in your air conditioner, and the message should disappear in approximately 5 minutes.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. 3.1-800-468-1502. 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.)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.Jul 31, 2022 · 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... Older Honeywell thermostats will also have a tougher time reading the temperature accurately. Your Honeywell thermostat providing an inaccurate reading is not a random occurrence. It’s a symptom of a problem you will have to address sooner rather than later. Find out how to correct your inaccurate Honeywell thermostat by reading on.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.

When your Honeywell thermostat continuously displays “Cool On” or “Heat On” alerts without achieving the desired temperature, it unquestionably signals a malfunction. Normally these messages only flash for five minutes and then turn solid to indicate the system has started.

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.Solution #2: Reset The Thermostat. Resetting the thermostat is a fundamental and often effective troubleshooting step for addressing the issue of a Honeywell thermostat flashing “Cool On.”. This process can rectify minor glitches and restore normal operation.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.I have a Honeywell thermostat, I believe it is a T6 Pro. Model is TH6220U2000. I have lived in this apartment for over a year and never been able to get the fan to run unless the heat or cool is on, w …Why is my Honeywell Thermostat Blinking Cool On? Five-Minute Compressor Delay. Low Thermostat Batteries. Power Outage. AC Unit Malfunction. …Cool: Thermostat controls only the cooling system. Off: Heating and cooling systems are off. Auto: Thermostat automatically selects heating or cooling depending on the indoor temperature. Em Heat (only for heat pumps with auxiliary heat): Thermostat controls Emergency and Auxiliary Heat.Honeywell PRO 1000 Series User Manual View and Read online. Est. reading time 4 minutes. PRO 1000 Series Thermostat manuals and instructions online. ... When "Heat On" or "Cool On" is flashing, compressor protection is engaged. Select the system setting * Model TH1110E1000 has a larger display than shown in image.Pro1 IAQ T721 User Manual View and Read online. Getting to know your thermostat. Understanding Thermostat Staging. Est. reading time 4 minutes. T721 Thermostat manuals and instructions online. Download Pro1 IAQ T721 PDF manual.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 ... It has come back on but Honeywell Pro Series control panel only shows month and year. Also an alarm inside is blaring every few seconds. ... fan on and off for cool or heat ...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.

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Honeywell 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.What "Cool On" Blinking Means: The "Cool On" blinking on a Honeywell thermostat indicates it is in a delay mode, often a safety feature, before activating the air conditioner.; Common Causes for Blinking: Power loss, recent power outage, and thermostat's internal checks are the common causes for the blinking message.; Quick Fixes Available: Resetting the thermostat and checking 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 ... My honeywell t4 pro series has a flashing "cool on" and I have used all of the suggestions and still the compressor does not turn on. Contractor's Assistant: How old is your Honeywell unit ...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.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.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 "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 new Honeywell T Series Programmable Thermostat has stages up to 1 Heat/1 Cool for conventional systems and 2 Heat/1 Cool for heat pumps.Features7-day, 5-2, 5-1-1 or non-programmableOn-screen menus with familiar installer setup (ISU) stepsUWP mounting.Verify your thermostat’s wiring. Check that the wires are connected securely to the terminals. Remember, the color of the wires only relates to the terminals they are connecting. Reference: The Y terminal on your thermostat controls the primary (1st stage) cooling. (Or the Y and O/B terminal if you have a heat pump system) In addition, the G ...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. ….

PRO. 4000. Press to set desired temperature. Note: Set SYSTEM switch to the system you want. to control (Heat or Cool). Set: Sets time/day/schedule. Hold: Overrides programmed temperature. Run: Resumes program schedule. System switch is used to control your heating.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...Hello I have a Honeywell T4 Pro that was flashing "Cool On" on the right side of the screen. Nothing seems to help I did replace the batteries and it stopped blinking and now it is solid "Cool On" When I run the test it does kick the AC on. So the AC itself is fine. It seems like it is something with the thermostat. It has fresh batteries.The T6 Pro Z-Wave Programmable Thermostat is a Z-Wave Plus certified 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.) It also measures, displays and reports % indoorA blinking 'Cool On' thermostat might be resolved by performing a reset and reprogramming the thermostat. To do this, consult your thermostat's manual for instructions on resetting and reprogramming. It may involve a simple restart or a complete factory reset, which would erase all previously programmed settings.1. Wait For 10 Minutes. Before you decide to fix the Honeywell thermostat cool-on flashing error, you must wait for about 5 to 10 minutes. As there is a good chance that your thermostat is going through a restart or running some checks. Or it might be facing a slight delay or using the compressor protection feature.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 ...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.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, Hello I have a Honeywell T4 Pro that was flashing "Cool On" on the right side of the screen. Nothing seems to help I did replace the batteries and it stopped blinking and now it is solid "Cool On" When I run the test it does kick the AC on. So the AC itself is fine. It seems like it is something with the thermostat. It has fresh batteries., If these icons are flashing, the thermostat is in delay mode, which can last up to 5 minutes. This delay protects your equipment from short cycling. If the thermostat is set for cool, verify that the furnace door is securely closed and that the furnace's power switch is set to On., Locate solutions to some of the most frequent Honeywell thermostat errors and how you can repair them. ... “Cool On” or “Heat On” is Blinking. ... Honeywell T6 Pro Smart Programmable Thermostat (TH411OU2005) 164—Heat pump requires service. Reach Service Experts Heating, Air Conditioning & Plumbing at 866-397-3787 for support., Usually, a Honeywell thermostat will enter Recovery mode when it needs to adjust from a mode that is energy-saving. When this happens, it will turn on your HVAC system before the time you scheduled a certain temperature, so it will get the chance to adjust gradually. For instance, if you set up your thermostat to offer you a temperature of 70 ..., 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 …, 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., Filtered Cool Moisture; Filter Free Cool Mist; Filter Free Warm Mist; Dual Comfort Cool + Warm Mist; ... Honeywell takes pride in ensuring effective air cleaning performance. To help ensure stated product performance and effectiveness, use only Genuine and Certified Honeywell replacement filters. ... Allergen Plus Series HEPA Consoles. Model ..., 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., 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 …, 1 Honeywell Home T4 Pro Thermostat. 2 Other Honeywell Pro Thermostat Manuals: 2.1 User Guide. 2.2 Package Includes: 2.3 Thermostat controls. 2.4 Customer assistance. 2.5 System operation settings. 2.6 Fan operation settings. 2.7 Set the time and date., Feb 14, 2021 · 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 now at 77 . Changed the batteries too. Contractor's Assistant: Do you know the model of your Honeywell thermostat? How old is it? Pro series will be 2 years old. Contractor's Assistant: How long has this been going on with your Honeywell thermostat? What have you ..., 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 ..., 00:00 - Why is my Honeywell thermostat on cool but not working?00:37 - How do I know if my thermostat is working properly?Laura S. Harris (2021, September 24..., Verify your thermostat’s wiring. Check that the wires are connected securely to the terminals. Remember, the color of the wires only relates to the terminals they are connecting. Reference: The Y terminal on your thermostat controls the primary (1st stage) cooling. (Or the Y and O/B terminal if you have a heat pump system) In addition, the G ... , This Honeywell Home Support page offers steps to bypass the schedule on your TH2210DH, TH2110DH, TH2210DV, or TH2110DV. ... Pro 2000 Horizontal Programmable Thermostat Support; T6 Pro Smart Thermostat Support ... cool switch is set to the desired run mode. Remember, after you set the desired setpoint and select your desired hold the thermostat ..., Fix 4: Update Firmware And Restart. To troubleshoot the Honeywell T5 thermostat, start by checking for firmware updates. Install the latest version if available. Next, turn off the power to the thermostat and then turn it back on to perform a restart. Give the thermostat some time to reset and reestablish its connection., Sep 26, 2023 · Verify Power Supply. To troubleshoot a Honeywell AC thermostat with a blinking cool on LED, start by verifying the power supply. Check the thermostat power source to ensure proper voltage supply. Inspect the power connections and make sure they are secure. If the wires are loose or damaged, tighten or replace them accordingly. , 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., If you replaced the batteries on your CT3200, CT3300, T8112, T8132 thermostat and are still getting the LOW BAT message, follow these steps: 1. Remove the batteries from the thermostat and place them in the opposite / wrong / incorrect position in the thermostat place the (+) on the (-) and vice versa). 2. Leave the batteries like that for 30 ..., 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:, Share This Guide. Reasons A New Honeywell Thermostat Would Blow Hot Air on Cool Mode. 1) System Is in Delay Mode. 2) You Are Using a Conventional System. 3) Your Outdoor Unit Has No Power Access. 4) Bad Thermostat Wiring., 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 ..., 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. , Dec 6, 2015 · 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 , 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., 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 …, What “Cool On” Blinking Means: The “Cool On” blinking on a Honeywell thermostat indicates it is in a delay mode, often a safety feature, before activating the air conditioner.; Common Causes for Blinking: Power loss, recent power outage, and thermostat’s internal checks are the common causes for the blinking message.; Quick …, 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., Honeywell PRO 1000 Series User Manual View and Read online. Est. reading time 4 minutes. PRO 1000 Series Thermostat manuals and instructions online. ... When "Heat On" or "Cool On" is flashing, compressor protection is engaged. Select the system setting * Model TH1110E1000 has a larger display than shown in image., Press the button below System on your Honeywell thermostat. This will reveal a blank box. Hold the blank box until your Honeywell thermostat's screen changes and displays your Model ID. Most Honeywell thermostats' Model ID starts with TH or RH and ends in numbers. Next, tap on the Menu option., Check the circuit breaker to your equipment. Confirm the thermostat is set to Cool mode and the setpoint (the smaller number at the top of the thermostat display), is set to a temperature lower than the display temp (the larger number in the center of the display). Confirm the message "Cool On" is solid (not flashing) on the thermostat display., 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.