Honeywell thermostat pro series cool on flashing - Details: Download the Honeywell Home app and follow the steps to link your thermostat to your Wi-Fi network. 546 Problem: (For Z-Wave models) Z-Wave Not Configured

 
Cool On: Cooling system is on. Heat On: Heating system is on. Aux On: Auxiliary heat is on. (Only for heat pumps with this capability [select models only].) When Heat On or Cool On is flashing, compressor protection is engaged (see page 14). Current day/time (see page 6) Current program period Wake/Leave/Return/Sleep (see pages 9-10). Dalton kendrick

I have a Honeywell home pro series, the cool on is flashing but the ac will not come on. ... 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.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 ...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.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.May 4, 2022 · Confirm the message "Cool On" is solid (not blinking) on the thermostat display. Confirm your wiring is correct, and the wires have good contact in the terminals (tug gently on the wires) Check your jumper / R wire. Thermostats get power on the R and Rc terminals.If you have a wire in the R terminal, and no wire in the RC terminal, use the ... Honeywell Home PRO 1000 Non-Programmable Thermostat. This manual covers the following models: TH1210DV: For 2 Heat/1 Cool heat pump systems (Pull the thermostat from the wallplate and turn it over to find the model number.) To prevent possible compressor damage, do not operate the cooling system when the outdoor temperature is below 50°F (10°C).Your thermostat is blinking heat on signal because there might be a problem in the outdoor unit. Moreover, a time delay problem might give blinking signals. Besides, low battery or power loss problems might show blinking results. You can replace the battery or reset it to solve the problem.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 HVAC professional.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 ...If you're experienced aforementioned Honeywell thermostats cool on flashing problem, there were some troubleshooting steps that can help. Read this blog post used view info. ... If you're experiencing the Honeywell thermostat cool on flashing problem, there are einigen troubleshooting steps such can helped. Read this blog post for more info ...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 moreSKU: 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.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.’.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.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 …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.To cancel the Permanent Hold, press + or - and then press Cancel. To Remove the Schedule completely. Press and hold Menu and + buttons for approximately 5 seconds to enter advanced menu. Press Select to enter System Setup (ISU) menu. Press Select to cycle through System Setup numbers. Press + or - to change values or select from available options.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.If you are using a Honeywell Pro series, follow these steps: When a menu pops up, press the next button until you see the 'Set' upper limit temperature on the right side of the screen. Press next to remove the lower limit, and your set lower limit should display. In this case, you should see 68.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. ... 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.A Honeywell thermostat blinks “cool on” if the batteries are dying, the blower motor is bad, or the air filter is dirty. The message can also appear if the thermostat was improperly installed or if the wires are damaged. Honeywell thermostats also display a “cool on” message if the compressor needs 5 minutes to reset.Wait 5-10 minutes. Your thermostat could be facing a slight delay in restarting and activating …Contents hide 1 Honeywell Home RTH6360 Series Programmable Thermostat 2 Included in your box 3 Tools you will need 4 Removing your old thermostat 5 Set date and time 6 System Setup 7 System Setup options 8 System operation settings 8.1 System modes: 8.2 Fan operation settings 9 Program Schedule 9.1 To adjust program schedules. […]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 5).Low batteries: Replace the batteries periodically, even if there is no "Replace bat" message . For older analog models, ensure the thermostat is mounted level on the wall and located about 5 feet from the floor. Remove the cover and check for dust, dirt, or corrosion, cleaning it with a soft brush or cloth if necessary.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 ...If Heat On or Cool On is flashing, compressor protection is engaged. Pull at bottom to remove thermostat from wallplate. Turn thermostat over, insert fresh AA alkaline batteries, then reinstall thermostat. Cool On 75Inside 75Set To Message flashes until safe restart time has elapsed. 33-00300EFS-05 Input: 24 V~ @ 60 Hz, 1.0 A Electrical Ratings1. 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.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.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.Curious about your Honeywell thermostat's blinking 'Cool On' indicator? Decode the signal, troubleshoot, and keep your cooling system in check effortlessly. ... When your Honeywell thermostat's 'Cool On' indicator blinks, it's not a cause for panic. This blinking signifies a delay designed to protect your heating and cooling equipment ...The TH6320WF2003 model – This model works well with 2 cooling stages and 3 heating stages. This thermostat is specially designed for heat pumps. The TH6220WF2006 – This model works very well with standard systems that use furnace heat as well as a central air conditioner. It manages both stages.Check your electrical panel. If your Honeywell Home smart thermostat has a blank screen or isn't kicking on your furnace or air conditioner, the breaker may have tripped. Check the breakers for the thermostat, your furnace, and your air conditioner to make sure everything is powered on. 3. Check the C wire.Now, let's dive into the step-by-step process of removing the cover on your Honeywell Pro Series thermostat: 1. Turn off Power. Begin by turning off the power to your HVAC system. Locate the circuit breaker or the power switch dedicated to your heating and cooling system and switch it off. This step is crucial for your safety and avoids any ...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 SupportTo set the Honeywell thermostat temperature to cool, follow these steps: Switch to Cool mode by pressing the System button on the thermostat, the Mode icon on the touchscreen, the System icon on the app, or saying a voice command, such as Set the system to cool. Adjust the desired cool temperature by using the up and down arrows on the ...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.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.Now, let's dive into the step-by-step process of removing the cover on your Honeywell Pro Series thermostat: 1. Turn off Power. Begin by turning off the power to your HVAC system. Locate the circuit breaker or the power switch dedicated to your heating and cooling system and switch it off. This step is crucial for your safety and avoids any ...The Honeywell digital thermostat is a popular choice for homeowners looking to efficiently control the temperature in their homes. However, understanding how to properly operate an...If this is the case, the furnace won’t start working even though the thermostat shows on. See what temperature the thermostat is set to check if the problem is in the described situation. 2. Clogged Filters And Fan Blades. The next problem HVAC systems owners often encounter when the Honeywell thermostat says heat on but the heat is not ...Customer: HONEYWELL PRO SERIES JA: ... Hello I have a Honeywell T4 Pro that was flashing "Cool On" on the right side of the screen. ... I have a Honeywell thermostat which controls my Haier hr48d1var outdoor heat pump/act unit. The cool indicator is continuously flashing and the ac won't kick on.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 ...Jun 25, 2023 · If the high limit switch is open due to overheating, it can cause the your Honeywell thermostat to flash “Heat On”. Troubleshooting will typically involve checking the high limit switch to ensure it is not tripped or stuck in the open position. If it is, allow the furnace to cool down and then reset the switch. Tenant ( Re building) has changed batteries. Her reply: Batteries changed. "Cool On" was flashing momentarily and now stopped flashing. 45 minutes have passed since it stopped flashing but still no cool air at all.I switched from heat to AC, last month. It didn't work so I opened the balcony doors.The T10 or T10+ Pro Smart Thermostat works with Smart Room Sensors to help you adjust the temperature and humidity from anywhere and stay cozy in the rooms that matter. Place sensors where you want to see each room's temperature and humidity. Use the multi-room display on the thermostat's touchscreen — or in the Resideo app — to focus on ...Share This Guide. 8 Reasons for Your Honeywell Thermostat Not Cooling. 1) Thermostat Not Set to Cool Mode. 2) Furnace Door Not Closed. 3) Furnace Circuit Breakers. 4) Issues With Thermostat Wiring. 5) Thermostat Not Correctly Configured. 6) Malfunctioning Reverse Valve. 7) Low Thermostat Batteries.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... 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.Is your thermostat repeatedly resetting, even when you haven’t touched it or adjusted the settings? In this case, the thermostat may be on hold. Expert Advice On Improving Your Hom...Kit with TH8321R1001 thermostat & RedLINK Gateway. SKU: YTH8321R1002/U. Simplify Your Whole Home Comfort. The VisionPRO® 8000 RedLINK® programmable thermostat allows homeowners to manage their entire home comfort system through one easy-to-use interface. With RedLINK wireless technology, the thermostat allows use with RedLINK accessories such ...Honeywell TH6320U2008 T6 Pro Series 3 Heat/2 Cool Programmable Thermostat OPEN. lucky7market (6127) 99.9% positive; Seller's other items Seller's other items; Contact seller; US $27.99. Condition: Used Used. ... So much easier to use than old Honeywell thermostat. Verified purchase: Yes Condition: New Sold by: jhmen_25. by jeremthacke2. Feb 17 ...Page 1 Fa n Auto PRO 1000 Series Cool Cool Non-Programmable Thermostat Of f Heat Operating Manual 69-2798 EFS...; Page 2 This manual covers the following models: TH1100DV: For 1 Heat systems TH1110DV: For 1 Heat/1 Cool systems TH1210DV: For 2 Heat/1 Cool heat pump systems ( Pull thermostat from wallplate and turn over to find …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...If you're experiencing the Honeywell thermostat stay on flashing problem, there are some troubleshooting steps that bottle help. Read this blog post for more info. 914-939-4350On 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 moreTo set your Honeywell thermostat's system mode for 9000 and 8000 models, follow these steps: First, tap the "SYSTEM" button to display the different system settings. Then, choose the desired mode by tapping the corresponding option: Tap "Done" to save your selection and exit the settings. Keep in mind that the Automatic and Emergency ...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.In this video, we will walk you through troubleshooting a Honeywell thermostat with a blinking "Cool On" message. If you're having issues with your thermosta... 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. The thermostat is programmed to wait for a sufficient amount of time before starting the next cycle, protecting your HVAC system from potential damage. 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.”Second 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 …The thermostat then turns on the heating or cooling at just the right time to reach your scheduled temperature at your scheduled time. For example: Set the Wake time to 6 am and the temperature to 70°. The heat will come on before 6 am, so the temperature is 70° by the time you wake at 6.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.When you see the "Cool On" blinking on your Honeywell thermostat, it means there's a problem with the cooling system. It flashes when the cooling system is not working right. The blinking light tells you something is wrong, and the thermostat needs fixing. 5. Troubleshooting Steps for Honeywell Thermostat Flashing Cool IssueTypically, the Cool On indicator flashing on your Honeywell thermostat should not be alarming. Sometimes, the indicator flashes when the air conditioner prepares to turn on …To reset the reminder: 600 Family Models - hold the Program and Time button down for 3 seconds. 700 Family Models will have a column of buttons on the left side of your thermostat - hold the second button from the top down for 3 seconds. 801 Model will have 2 buttons behind the door - hold down the one on the left (Fan Button) for 3 seconds.Sep 29, 2021 · A “cool on” message can also appear if the thermostat logs out or times out on its own. Wait 5 minutes, restart your thermostat, and identify and replace fuse or wire damage to make it return to normal. Thermostats can also flash a “cool on” message if it is working hard to produce cool air. This can happen even if there isn’t an ... 1-Week Programmable Thermostat Support; 5-2 Day Programmable Thermostat Support; Single-stage Programmable Thermostat Support; Pro 2000 Horizontal Programmable Thermostat Support; T6 Pro Smart Thermostat Support; T5/T5+ Smart Thermostat Support SIMPLE TO THE TOUCH. Looking for a traditional, easy-to-use thermostat, install the inexpensive PRO 1000 Vertical Non-Programmable Thermostat. You will appreciate the backlit digital display and the reliable basic operation of the slide switch to select heat, cool or fan. SELECT A MODEL: PRO 1000 Vertical Heat Non-Programmable Thermostat.We would like to show you a description here but the site won't allow us.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.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.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.1. Inspect the Wiring. If your Honeywell thermostat wires are loose, or not inserted in the right terminals, the device may not turn on your heating system. So if your Honeywell thermostat won't turn on heat, the wires might be loose or inserted wrongly. Check and ensure the wires are inserted into the correct terminals.You need to first identify whether the COOL feature is working or not. To do so, set the fan switch to auto and the switch at the top of your thermostat to COOL. Turn the dial to the lowest setting like 60℉ and wait for 5 minutes. If the air conditioner unit kicks in, the COOL feature is functioning right.The Honeywell thermostat cool on blinking issue is a common problem with air conditioning systems. When the thermostat display says "Cool On," it means that the AC unit is working to pump cool air into the home. However, if the thermostat keeps blinking cool on for a long time and no cool air is felt, there may be an issue.If it is enabled, just press the ‘disable recovery mode’ option. 2. Monitor the results. Give your Honeywell thermostat around a day to see if the recovery mode turns on. Likely, this should not worry you. If that period of the day ends and the thermostat switches into recovery mode, there is something wrong. 3.Option 1: Soft Resetting Procedure. Sometimes, all it takes is a soft reset to get your Honeywell Thermostat Pro Series back on track. Think of it as a gentle nudge to remind your thermostat who's in charge. With just a few simple button presses, you can clear minor issues and restore your thermostat to its optimal state.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...

® TH5000 Series 1 69-1923EFS—01 ENGLISH About your new thermostat ... Congratulations on the purchase of your new Honeywell thermostat. It has been designed to give you many years of reliable service and easy-to-use, push-button ... Heat On/Cool On (If flashing, see page 9) System setting Heat/Cool/Auto/Off/ Em Heat (see page 7) …. George credit quick auto

honeywell thermostat pro series cool on flashing

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.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 …PRO 1000 Series Non Programmable Thermostat Operating Manual CoolOn Of f Heat Cool Auto On Fa n. Read before installing. ... When "Heat On" or "Cool On" is flashing, compressor protection is engaged (see page 8). ... The Honeywell Home trademark is used under license from Honeywell International, Inc. This product is manufac -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.After that, return to the Menu and pick "Installer Options". Then, input your password/date code. Pick "Installer Setup". After that, follow the prompts to select pick the available options and customize as desired. Finding the password and accessing the installer setup in a Honeywell 8000 series thermostat.The best Honeywell thermostats with fan circulate mode include the T6 Pro Smart thermostat, WIFI 9000 color touchscreen thermostat and VisionPro 8000 series. Not all Honeywell thermostats come with the circ setting feature, there are only select models and the following Honeywell thermostats do have the fan circulate mode and are worth ...I have a Honeywell home pro series, the cool on is flashing but the ac will not come on. ... I need a QR code to connect my Honeywell pro-series thermostat to apple mini HomePod. Thank you. ... I replaced the batteries to my Honeywell T4 Pro. The "cool on" is blinking in the upper right hand corner of the thermostat, the air does not come on. ...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.Honeywell Home TH2210DH1000 - PRO 2000 Horizontal Programmable Thermostats (2 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.Select your Home Wi-Fi network name and touch "CONNECT". For hidden networks, touch the "OTHER" button to enter the network name/SSID manually. Enter the password for your Home Wi-Fi network. Touch "NEXT". You will receive a "Success" message. Step2- Register your thermostat.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.To reset a Honeywell thermostat, follow these steps: Turn off the power to the thermostat by switching off the appropriate circuit breaker. Remove the battery and ….

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