Honeywell home pro series blinking cool on

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 ...

The cool on is flashing there is a 100 where the room temperature setting woul ... Can not change the temperature - display says unlock at the bottom of the display — it's a pro series Honeywell home thermostat - I could push the leftmost button on the pro series thermostat edit it ...There is no power outage. Honeywell pro series. No model number. I checked breakers and - Answered by a verified HVAC Technician ... our honeywell home pro series is showing an alert "ACPower Loss" however the power is on in the house ... the cool on is still flashing on our ac after my husband vacuumed it out , we replaced the batteries and ...Honeywell 6000 Series: If your thermostat falls under the Honeywell 6000 Series category, make sure the thermostat is turned on. Then, press and hold the "Fan" button as well as the "Up" arrow. Hold these for about five seconds, then release them. Press the button on the bottom left until you see "39" on the display.SKU: TH2210DH1000/U. Simple Temperature Control. The Honeywell Home PRO programmable thermostats from Resideo offers you a basic thermostat with the benefits of energy savings. The PRO 2000 Vertical Thermostat features an easy-to-read display and 5-2 day programming for precise control that fits your schedule. SELECT A MODEL: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 ...This manual is also suitable for: View and Download Honeywell Home VisionPRO TH8320R1003 user manual online. VisionPRO TH8320R1003 thermostat pdf manual download. Also for: Visionpro th8110r1008, …The fix. If your thermostat is flashing cool on, wait for 5 minutes until the delay is over. Usually the thermostat delay should not take more than 5 minutes. However, if your thermostat is not blowing cold air after the delay period, there could be issues causing this problem. Let's go to the next step to find out more.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.

View Add to my manuals 16 Pages. Honeywell Pro 3000 is a non-programmable thermostat that offers precise temperature control for your home. With its intuitive interface and a large display, it makes it easy to adjust and monitor the temperature. The built-in compressor protection feature prevents damage to the compressor by enforcing a 5-minute ...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.In today’s fast-paced world, home security has become a top priority for many homeowners. With the advancements in technology, there are now numerous home monitoring systems availa...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.The Honeywell Home T1 Non-Programmable Thermostat mounts easily and works with several heating and cooling systems including electric warm air, gas and electric hydronic. ... The T1 Pro Non-Programmable Thermostat comes with the standard UWP mounting system. The soft key controls (with a 2.37 sq. in. display) and the easy-to-read LED back light ...

Step 1. Change the Temperature. The first thing you can do if your thermostat display is on, but doesn’t power on the HVAC system, is to adjust the temperature. So, first, try changing the temperature on your Honeywell thermostat. Also, make sure the desired temperature falls within the acceptable ranges.The cool on is blinking but ac not on, pro series 1-2 years old, it was off to - Answered by a verified HVAC Technician. We use cookies to give you the best possible experience on our website. ... our honeywell home pro series is showing an alert "ACPower Loss" however the power is on in the house ...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.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...have honeywell visionpro th8000 series thermostat and cannot get right side temp settings unlocked have tried several procedures and have been unsuccessful.-reg ... I have a Honeywell TH8000. There is a red flashing 'fan' or 'snowflake' at the top right corner. It flashes approx 10 times per cycle. ... When we left the home for a few months, ...1. Verify that the thermostat is set to cool and is calling for cooling, usually indicated by the words "cool on," a snowflake icon, or a shimmering snowflake icon. If the room temperature is below the cool set point, the thermostat display should indicate a call for cooling. 2. Confirm that the circuit breakers are on.

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Step 1: Wait it Out! If your Honeywell thermostat displays the "Wait" signal, allow it up to 5 minutes to clear. It might clear out sooner or even take an extra couple of minutes, so I highly recommend giving it a solid 10 minutes so you can verify the issue is not the compressor protection feature.Honeywell Home offers smart home, home comfort, safety and energy efficiency solutions for your home. Learn more about our connected products and innovations in...Confirm you have a C wire in the C terminal. If your previous thermostat did not use a C wire, it's unlikely that it is connected at the equipment. Verify the C wire is connected to the C terminal in your furnace or air handler. Check your jumper selector switch. If you have a wire in the R terminal and no wire in the RC terminal, verify the ...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.T6 Pro Smart Thermostat Multi-Stage 2 Heat/2 Cool. SKU: TH6220WF2006/U. Control Your Comfort. The T6 Pro Smart Thermostat can give you home comfort control from anywhere. Connect to the app to view and change temperature settings, program a 7-day schedule or just let the T6 respond automatically it's designed to work with the heating stages of ...

Honeywell home pro series thermostat heat on blinking. Honeywell is a well-known brand that manufactured a thermostat. The thermostat itself is a device that helps you to maintain a suitable temperature inside your house by triggering an air conditioning or heating system when the temperature rises or drops from a particular temperature that ...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 ...Here are some quick tips on resetting the factory setting to most Honeywell thermostats: 1. Confirm your thermostat is ON. 2. Press and hold down the MENU button for 5 seconds. 3. Use the scroll buttons to move to RESET. The button should lead to left scrolling. 4.The blinking “Cool On” message on a Honeywell thermostat display indicates that the system is restarting, batteries need replacing in the control panel, or a fault with the system. If the blinking persists for more than five minutes, contact a technician to perform diagnostics.Need help with your Honeywell Home Thermostat device? ... Our Accessibility Statement. Beat the heat and save this season on a smart home thermostat. Search Button Find a Pro. Toggle ... Products toggle menu. Products. HEATING, COOLING & ENERGY HEATING, COOLING & ENERGY. Thermostats; WiFi Thermostats; 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 ...Wenn you're experiencing the Honeywell thermostat cool on flashing problem, there been some troubleshooting steps that can helps. Go this blog post for more info. ... If you're experiencing the Honeywell thermostat cool on wink problem, there are multiple troubleshooting steps that may help. Read this blog post for more info. 914-666-9100 ...Hi, I have the Honeywell PRO 2000 thermostat. My apartment building turned the power on and off, and now my thermostat won't turn on the air conditioner. Remains at 79/80 degree.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 …2 May 2021 ... T4 PRO PROGRAMMABLE THERMOSTAT TH4110U2005/U Honeywell t4 pro thermostat installed, t4 pro setup, wiring, indept installation video, ...

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.

1. Verify that the thermostat is set to cool and is calling for cooling, usually indicated by the words "cool on," a snowflake icon, or a shimmering snowflake icon. If the room temperature is below the cool set point, the thermostat display should indicate a call for cooling. 2. Confirm that the circuit breakers are on.Modal. 1 Press and hold Menu and + buttons for approximately 5 seconds to enter advanced menu. 2 Press Select to enter System Setup (ISU) menu.Turn off your thermostat, open the battery compartment on the front, and remove the batteries. Put the new batteries in the compartment and slide the protective plate over them. Place the thermostat back on the wall, turn it on, and check to make sure that the new batteries work. In a lot of ways, replacing the batteries on a Honeywell ...Summary of Contents for Honeywell Home T1 Pro. Page 1 T1 Pro Product TH1110D2009 Information TH1010D2000 Built-in compressor protection Thermostat controls Damage can occur if the Message flashes until safe • System status • Indoor temperature compressor is restarted restart time has elapsed. information setpoint too soon after shutdown.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.Turning off the Honeywell thermostat's permanent hold setting is easy. It is usually the same for turning off a temporary hold. Depending on your model, you can go ahead and press Run, Cancel, Run Schedule, Use Schedule, Remove Hold, or Cancel Hold. For other models such as the T4 Pro, press the +/- or up/down buttons first then …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.If COLD, this means your thermostat is cooling correctly, but the heating isn’t working properly. Contact Support at 1-855-733-5465 to find a pro-installer in your area. If WARM/HOT, this means your reversing valve may not be configured or wired properly. Continue to the Thermostat Wiring section.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 you're experiencing the Honeywell thermostat dispassionate on flashing issue, it are some troubleshooting steps that can help. Read this blog publish for more info. 914-666-9100

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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 moreWe would like to show you a description here but the site won't allow us.The ideal Honeywell thermostat range for a home is between 71-74°F. Anything below that may cause the machine's cooling coils to freeze up and break. As a result, many devices have a lock that won't allow you to go below 70°F. Additionally, check to make sure you don't have a schedule set on your programmable thermostat.Hi, I have a multi-zone residential setup using the Honeywell Z311. When I call for the AC from the thermostat, the AC unit outside starts up and then stops after a minute or so. Sometimes shorter, sometimes longer. It's doing it on both zones. There is a flashing cool light on the honeywell z311 when this occurs. "Blinking when 45°F (7°C) DATS low limit mode has been reached."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.Change the temperature to the lowest possible. The first thing you should do is to make sure if the thermostat can regulate the temperature or not. Adjust the controller settings and see if the cooling works. Now set the temperature to the lowest possible while the mode is set to 'Cool' and the fan setting is on 'Auto'.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. 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 ... There is no power outage. Honeywell pro series. No model number. I checked breakers and - Answered by a verified HVAC Technician ... our honeywell home pro series is showing an alert "ACPower Loss" however the power is on in the house ... the cool on is still flashing on our ac after my husband vacuumed it out , we replaced the batteries and ...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 ...I have cool on flashing on the thermostat and the air conditioning is not working. Just Honeywell maybe 5/6 years. ... Have a Pro series set the air conditioning for 24.0 the air is cooling to 21.5. I changed the temperature set but it keeps cooling to 21.5. ... On my Honeywell Home Pro Series thermostat there 3 things going on. 1. Cool on is ... ….

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.2 Oct 2021 ... Honeywell Home 9000 Series thermostat and Vision Pro ... Honeywell 9000 Series WiFi PLUS How to Install and Configure ... "Cool On" Is Blinking ...If your Honeywell thermostat won't go above 68, there could be a few possible issues. First, you should check the setting on the thermostat to make sure it is set to heat and not cool mode. If it is in heat mode but still won't go above 68, then you may need to replace the batteries if it uses them or reset any circuit breakers that are ...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.Aug 4, 2022 · 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. WIFI SMART COLOR THERMOSTAT Manual & Support. RTH9585WF1006/W, RTH9585WF1004/U. Download Manual. WIFI SMART COLOR THERMOSTAT Product Page.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 moreIf 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.)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 ...The T1 Pro Non-Programmable Thermostat comes with the standard UWP mounting system. The soft key controls (with a 2.37 sq. in. display) and the easy-to-read LED back light make this thermostat from Resideo one of the best choices in temperature control on the market. SELECT A MODEL: T1 Pro Non-Programmable Thermostat - 24 Vac. Honeywell home pro series blinking cool on, With the advancement of technology, home security has become easier and more accessible than ever before. One popular option for homeowners is the use of smart home security system..., Amazon customers can also recycle their old cameras by requesting a free UPS shipping label through the Amazon Recycling Progam. Amazon is now offering to replace customers’ discon..., A Honeywell thermostat not working after a battery replacement could be due to not inserting the correct batteries, inserting them incorrectly, or following the wrong battery replacement procedures. For many Honeywell thermostats, for instance, resetting is a necessary first step. Thus, by checking a few aspects, you might find the problem easy ..., WAC setting If you want to disconnect your thermostat from Wi-Fi, follow the steps below. 1 Touch Menu on the thermostat home screen. 2 Touch the or arrows until you see WIFI, then touch Select . 3 Touch the or arrows until you see WIFI ON/OFF, then touch Select . 4 Touch the or arrows to choose WIFI ON or WIFI OFF., 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., Honeywell thermostats are some of the most popular and most reliable thermostats on the market today.No matter which model thermostat you chose, you can almost bank on the thermostat working reliably for years.When something like a backlight goes out, it is inevitably a simple matter to diagnose and repair.A variety of reasons can cause the backlight on a Honeywell thermostat backlight to stop ..., Apr 26, 2020 · The flashing "cool on" means it is calling for cooling. Are you able to remove the thermostat cover and upload a clear photo of the wires so I can see what you have, then I can assist you better. Ask Your Own Home Improvement Question , 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 fix. If your thermostat is flashing cool on, wait for 5 minutes until the delay is over. Usually the thermostat delay should not take more than 5 minutes. However, if your thermostat is not blowing cold air after the delay period, there could be issues causing this problem. Let's go to the next step to find out more., 1. Reference your photo and documentation of your previous thermostat's wiring and confirm that there weren't any errors in your Lyric wiring. 2. Confirm that the provided AAA Lithium battery is still installed in your Lyric. Additional troubleshooting: Confirm that your wires are properly labeled. You can trace the wires back to the heating ..., 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, 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., For complex problems, engaging professional assistance ensures a swift resolution. Honeywell Non-Programmable Thermostat Troubleshooting. If your Honeywell non-programmable thermostat is not working, first check the batteries and replace them if needed. Ensure the thermostat is set to the correct mode (heating or cooling)., Feb 16, 2023 · Due to drained batteries, the heating or cooling feature of thermostats malfunctions. Go to your thermostat’s display and see the battery level. Insert the batteries of the required voltage so that your thermostat performs well. Replacing the batteries can debug the Honeywell thermostat won’t switch to cool. 4. , 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., - Ace How To Reset Honeywell Thermostat Honeywell thermostat flashing 11n They really didnt seem stretched, just very loose. Only thing i don't like is the underwear, they're uncomfortable and itchy. honeywell pro series heat on blinking Theres no awkward feeling when I walk in these shoes. Let me get my license first, then my instrument ..., PROA7PLUS ProSeries 7 inch All-in-One Panel. All-in-one Security system serves as a central hub for security and home automation with wireless controller, communicator, microphone, speaker and siren. Supports wide selection of sensors and devices using SiX™ two-way, wireless technology with highly secure AES-128 encryption., If you're experiencing the Honeywell thermostat cool on flashing problem, at are some troubleshooting stepping that sack help. Read this blog post for more info. 914-666-9100, The thermostat has a built-in compressor protection (minimum off timer) that prevents the compressor from restarting too early after a shutdown. The minimum off timer is activated after the compressor turns off. The thermostat keeps the compressor off for a few minutes before restarting, to prevent equipment damage., 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., 18 Jan 2022 ... In this video I show you how to set and change the time and date on the Honeywell T4 Pro Series Thermostat. I show you step by step how to ..., Summary of Contents for Honeywell Home PRO 1000 Series. 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 https://www.justanswer.com/ythiJACUSTOMER-63s3by4n-: HVAC Technician: I have a honeywell pro th4000 series system.JACUSTOMER-63s3by4n-: HVAC Technician:..., During the brief wait period, the thermostat will flash Cool On (or Heat On if you have a heat pump) until the wait period is over, at which point the compressor will turn back on. Note: The flashing Cool On or Heat On message is also used for startup delay protection if AC power loss occurs. Without wishing to be too rude, many manuals for ..., 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 ..., Honeywell Thermostat Flashing “Cool On” Basics. A Honeywell thermostat is a user-friendly device designed to control and regulates indoor temperature settings in homes and businesses. It helps maintain comfortable and energy-efficient environments by allowing users to customize heating and cooling systems., View and Download Honeywell Home 9000 Series user manual online. Smart Colour Touchscreen Thermostat. 9000 Series thermostat pdf manual download. ... Thermostat Honeywell Home T6 Pro Series Installation Instructions Manual (44 pages) ... Page 49 Glossary Heat Pump heating/cooling system Heat pumps are used to heat and cool a home. If your old ..., The simplicity of the Honeywell Home PRO 2000 vertical thermostat from Resideo makes it an easy upgrade from basic up-down temperature controls without committing to a WiFi-connected thermostat. The PRO 2000 vertical thermostat has a large, backlit screen that is easy-to-read and features a real-time clock, with simple push-button controls., The blinking “Cool On” message on a Honeywell thermostat display indicates that the system is restarting, batteries need replacing in the control panel, or a fault with the system. If the blinking persists for more than five minutes, contact a technician to perform diagnostics., Honeywell T4 Pro Troubleshooting. Honeywell T4 Pro Troubleshooting can be done by following a few simple steps. Firstly, check to ensure that the thermostat is connected and powered correctly. Check if there are any loose or damaged wires, then return power to the system and try operating it again. Secondly, reset the system by pressing and ..., If you want to change the heat set point when it says "auto cool", you must first press the mode button until the mode shows "heat", then use the + or - to change the heat set-point. Then press the mode button to switch the mode back to Auto Changeover. If you are trying to set the heat and cool set points for your program settings (wake, leave ..., 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., Turn off your Honeywell Thermostat switch. Open the battery slot by pressing the door down and sliding it out. If this doesn’t work, try inserting a coin or some similar object in the slot. Once you have opened the battery slot, slide the batteries out. Re-insert the batteries, but put them in a reversed position.