Honeywell pro series flashing cool on

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.

Honeywell pro series flashing cool on. 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.

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 TH4110D1007 Temperature settings do not change. Make sure heating and cooling temperatures are set to acceptable ranges: Heat: 40° to 90°F (4.5° to 32°C). Cool: 50° to 99°F (10° to 37°C). "Cool On" or. "Heat On" is flashing. Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely ...Summary of Contents for Honeywell Home T6 Pro. Page 1 T6 Pro Programmable Thermostat User Guide – Package Includes: • T6 Pro Thermostat • UWP™ Mounting System • Decorative Cover Plate TH6320U2008, • Screws and Anchors TH6220U2000, • 2 AA Batteries TH6210U2001, • Thermostat Literature Read before installing Thermostat …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 ...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 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 ...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.

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.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 TechnicianSo, 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.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.Reduce the temperature setting on the thermostat to the minimum possible value. Set your gadget to the lowest temperature possible and ensure that the ‘Cool’ mode is selected. In case, if your Honeywell Thermostat indicates cool on but no air is coming out. You should verify that the fan setting is set to Automatic.If you are using your thermostat with a Honeywell Wi-Fi module and your thermostat does not respond as expected, it is possible that there is an issue with the Wi-Fi module. To fix this, you will need to reset the Wi-Fi module. 6. The batteries are low. If the batteries are low, it will not work properly.

Honeywell Home PRO 5-2 Programmable Thermostat for Heat/Cool Systems or Heat Pump without Auxiliary Heat. ... PRO 5-2 Programmable Thermostat for Heat/Cool Systems SKU: TH4110D1007/U? Toggle. ... PRO 4000 Series Programmable Digital Thermostat Installation Instructions (English, French, Spanish) - Legacy Product Document ...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.From https://www.justanswer.com/ythiJustAnswer Customer: I have a VisionPro th8000 series thermostat.JustAnswer Customer: A red light is flashing on the uppe...Step 1: Check Wi-Fi Signal Strength. Weak Wi-Fi signals are the primary cause of connectivity issues in smart thermostats, so by improving the signal can make a world of difference. To see if this is the case, check the signal strength using the Wi-Fi signal bars indicator on your smartphone or smart device. If your smartphone shows low Wi-Fi ...

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Thermostats Take control of your home comfort and save on energy costs with a range of Honeywell Home thermostats. From smart WiFi thermostats with room sensors and humidification control, to programmable and non-programmable thermostats, Honeywell Home products meet a variety of needs.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 ...Thermostats Take control of your home comfort and save on energy costs with a range of Honeywell Home thermostats. From smart WiFi thermostats with room sensors and humidification control, to programmable and non-programmable thermostats, Honeywell Home products meet a variety of needs.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.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.

Sep 3, 2023 · An incorrect display can cause your Honeywell thermostat cool on to blink. To troubleshoot, verify the thermostat’s settings and programming: Ensure the thermostat is set to “cool” mode. Check if the cool on indicator is blinking or a solid light. Review your programmed temperature settings to ensure they’re accurate. 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. 914-939-4350Ensure that your thermostat is turned off. Open the door of the battery compartment. Insert a coin or something similar into the slot or by pushing it in and then sliding out the compartment door. Now take out the batteries. Put the batteries back on in reverse to the indicated polarity by the markings in the battery holder.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". 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. Leave the unit for a while and check whether the system is going to start cooling or not. Check other thermostat settings - something might have made your thermostat switch back to setup mode. Also, check the time on the device, as wrong settings can make the 'cool on' indicator start blinking. Replace the batteries or check the wiring ...When COOL ON blinks, it usually indicates a cooling system delay. But when it flashes for over 5 minutes, the primary reasons are power outage, sensor issues, wrong thermostat settings, low batteries, dirty filters and coils, wire problems, and wrong mode selections.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.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 ...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 need to reset your Honeywell Pro Series thermostat, the process is simple. First, locate the Reset button on the thermostat's control panel. It should be located near the bottom of the device and may have a "Reset" label above or below it. Once you've located it, press and hold down for 10 seconds until all settings are restored ...

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 ... 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. The SYSTEM switch can be set to control your heating or cooling system, depending on the season. Cool: Cooling system control. Off: All systems are off. Heat: Heating system control. 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.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.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, …Summary of Contents for Honeywell Home T3 Pro. Page 1 Heat On User Guide Menu Package Includes: Fan Auto • T3 Pro Thermostat • UWP™ Mounting System • Decorative Cover Plate – Small; Size 4.72” H X 5.9” W (120 mm H X 150 mm W) • Screws and Anchors TH3110U2008, •...It could be that your thermostat is not currently receiving power due to the batteries drying up or a problem with the power source. In either case, if your thermostat uses AA batteries, try replacing the batteries. If it is directly connected to a power source, then check if the power source is working or not. Check Connection Points.Works with Your Favorites. Connected to your existing WiFi, the T6 Pro Smart Thermostat is already part of the family. Integration with your Apple HomeKit and Amazon Echo lets you adjust your temperatures as easily as you change songs on your playlist. This thermostat also works with your heating systems stages, up to 3 Heat/2 Cool with heat pump.

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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 have forgotten your 4-digit passcode, there are two things that you can try out to unlock your Honeywell thermostat: Insert 1234 as the passcode. If that didn't work, then look inside the thermostat and take note of the 4-digit date code; after that, add 1234 to the number. For example, if the date code is 0919, then insert 2153 as the ...In today’s technologically advanced world, smart homes have become increasingly popular. With the Honeywell Home Pro Series, homeowners can enjoy the convenience of controlling var...Troubleshooting guide: Why is your Honeywell thermostat flashing 'Cool on'? Get answers to fix HVAC issues fast...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. ... When Cool on is flashing, it means the command was sent to start the AC unit, it is just the delay for it to kick in. Once it stops flashing, the unit outside is generally on. ...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.It could be that your thermostat is not currently receiving power due to the batteries drying up or a problem with the power source. In either case, if your thermostat uses AA batteries, try replacing the batteries. If it is directly connected to a power source, then check if the power source is working or not. Check Connection Points.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.We have a Honeywell home pro series model TH4210 you 2002 and we can't adjust the thermostat ... I have a Honeywell home pro series, the cool on is flashing but the ac will not come on. ...Jul 2, 2020 ... HONEYWELL THERMOSTAT NOT TURNING ON AC SYSTEM merch = https://teespring.com/stores/steve-lav https://www.patreon.com/stevenlavimoniere ...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.PROA7 ProSeries 7 Inch All-In-One Panel. All-in-one Security system serves as a central hub for security and life safety with a 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. ….

Oct 25, 2023 · 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 ... Sep 3, 2023 · An incorrect display can cause your Honeywell thermostat cool on to blink. To troubleshoot, verify the thermostat’s settings and programming: Ensure the thermostat is set to “cool” mode. Check if the cool on indicator is blinking or a solid light. Review your programmed temperature settings to ensure they’re accurate. Honeywell system is flashing "cool on" for at least 30 minutes. 10 years. Wi fi thinking th6000, I have a product - Answered by a verified HVAC Technician. We use cookies to give you the best possible experience on our website. By ... I have a Honeywell 26 pro series, I go to the full process ...A Honeywell thermostat will go blank, in case the device is off (there is no power, the circuit breaker had tripped, the batteries are dead), there are issues with the wiring, or the safety switch had tripped. Low display brightness can also be the root cause of the problem. Why Does Honeywell Thermostat Go Blank?. The thermostat might simply be off; There is no power to the thermostatSometimes, a simple reset of the thermostat settings can resolve battery-related issues. To reset the settings of your Honeywell Pro Series Thermostat, follow these steps: Press and hold the "Reset" button: Locate the "Reset" button on your thermostat. It is usually located at the bottom or back of the device.It will turn the fan on but not the ac just blinks "cool on" Honeywell T5. It was replaced last week. But it's blinking - Answered by a verified HVAC Technician. ... I have a Honeywell home pro series, the cool on is flashing but the ac will not come on. ...13 Early Start. 14 Battery replacement. 15 Customer assistance. 16 In case of difficulty. 16.1 Display is blank. 16.2 Heating or cooling system does not respond. 16.3 Temperature settings do not change. 16.4 "Cool On" or "Heat On" is flashing. 16.5 "Heat On" is not displayed. 16.6 "Cool On" is not displayed. 17 Documents / Resources.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... Honeywell pro series flashing cool on, "Cool On" is not displayed • Set the System switch to Cool, and set the temperature level below the current room temperature. Temperature Ranges Heat: 40° to 90°F (4.5° to 32°C) Cool: 50° to 99°F (10° to 37°C) Operating Ambient Temperature 32° to 120°F (0° to 48.9°C) Shipping Temperature-20° to 120°F (-28.9° to 48.9°C), • Cool: 50 °F to 99 °F (10.0 °C to 37.0 °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). Electrical Ratings Terminal Voltage (50 Hz/60 Hz) Running Current W Heating 20 Vac - 30 Vac 0.02 A - 1.0 A, The Honeywell AC thermostat is displaying a blinking "Cool On" indicator. In this situation, it is important to troubleshoot the issue to identify the cause and find a solution. ... Read More Honeywell Pro Series Thermostat Fan Won't Turn Off: Troubleshooting Tips. Thermostat Solutions. Adt Thermostat Not Working: Troubleshooting and ..., Environment. QRAE. MultiRAE Plus. MultiRAE IR. Answer / Solution. Usually a red and green flashing LED means that the battery is too low to charge or the fuse is blown in the battery. Try unplugging and plugging the monitor into the charger, if that does not make the flashing lights go away, try a new battery. URL Name., Reduce the temperature setting on the thermostat to the minimum possible value. Set your gadget to the lowest temperature possible and ensure that the ‘Cool’ mode is selected. In case, if your Honeywell Thermostat indicates cool on but no air is coming out. You should verify that the fan setting is set to Automatic., All Honeywell thermostats, no matter the type of model, have a symbol showing you when the air conditioning is turned on. It can be a snowflake or it may say "cool on.". When the air conditioner is actually running it will be a steady symbol, but you may notice it flashing at times. This indicates that your HVAC system is in a delay mode., If you have a heat pump, you will not use a wire in the W terminal. Move the W wire to the W2 or Aux terminal. (W controls your first stage of heating for Gas/Oil/Electric systems. O/B and Y control your first stage heating for heat pump systems. Backup heat sources must be connected to the W2, Aux, or E terminal for proper functionality.), 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., Last 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., 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., 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., Mar 3, 2022 · Change the batteries. Replace air filters. Check the furnace door/power switch. Inspect air conditioner coils. Replace the thermostat. Call in an HVAC specialist. Honeywell thermostat set to cool but heating. Confirm the thermostat is set up properly. Lower the temperature on the thermostat. , 10.1 Honeywell Focus Pro 5000 Review Video; 11 Documents / Resources. 11.1 References; ... "Cool On" or "Heat On" is flashing. Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, ... Download Honeywell FocusPRO 5000 Series Manual. Advertisement., When you see "Wait" or "Waiting for Equipment" on your Honeywell thermostat, it's signaling that the system is currently in a safety delay. This built-in safeguard pauses the operation of your HVAC equipment, specifically, the compressor, to allow for a proper cooldown and reduce the strain on the hardware. Implementing this pause ..., 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..., 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., 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)., If the screen of your Honeywell thermostat is blank, you should first check the furnace or air conditioner to be sure both are on and functioning properly. If the door to the furnace is open, for instance, the thermostat display may be blank. A fix could be as simple as closing the door of the furnace. You should also check the circuit breaker ..., Page 1: Thermostat Controls. Turn thermostat over, insert fresh AA alkaline batteries, then reinstall Product Manuals thermostat. Search online for Honeywell 69-1929EFS for the Installation Guide. Search online for Honeywell 69-1776EFS for the User Guide. 33-00300EFS-01..., Jim Cramer says it's worth taking a look at shares of Honeywell, based on its updated guidance....HON Honeywell's (HON) stock is undervalued compared to other industrial compan..., T6 PRO PROGRAMMABLE THERMOSTAT Manual & Support. TH6320U2008/U, TH6220U2000/U, TH6210U2001/U. Download Manual Download Installation Guide. Download Service Datasheet. T6 PRO PROGRAMMABLE THERMOSTAT Product Page., 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 have a C wire, place it into the C terminal on your wall plate. C wire adapters are available here. Let's look at the G wire. This wire goes to the G terminal on your new thermostat. Of the Y, Y1, and Y2 wires, Y or Y1 go to the Y terminal and Y2 to the Y2 terminal. The O/B wire can have many configurations., 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., View and Download Honeywell Home T6 Pro user manual online. Programmable Thermostat. T6 Pro thermostat pdf manual download. Also for: Th6320u2008, Th6220u2000, Th6210u2001. ... Off/Cool/Auto/EM Heat (emergency heat) • Menu. Press to display options. Start here to set a program. ... Thermostat Honeywell Home T6 Pro Series Installation ..., Dec 2, 2023 · 1. Lower Thermostat Temperature. 2. Check Thermostat Batteries. 3. Inspect Electrical Wiring. 4. Reset AC Circuit Breaker. 5. Replace AC Filter. 6. Clean AC Condenser Coils. 7. Verify Thermostat Settings. 8. , 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., About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ..., 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., 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., To check the underline code behind the warning sign, follow these steps below: Step 1: The alert icon appears on the Home screen. Step 2: Press Menu, and then press until the display shows ALRT. Step 3: Press ‘Select’ to display which alert (s) are present. Step 4: The message REPL (REPLACE AIR FILTER) appears., 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., My honeywell pro series thermostat is working incorrectly. Model #TH1110D2009. Someone pushed the middle button, menu - Answered by a verified HVAC Technician. ... The cool on is flashing there is a 100 where the room temperature setting woul ...