Cool on flashing on honeywell thermostat

CT30/CT33 Low-voltage Thermostat 5. Set adjustment lever (CT30 only) 1 Separate cover from thermostat, and remove the plastic insert. 2 Use a pencil to move the adjust- ment lever to the proper setting for your system (see table below). Finish installation. 1 Align the 3 tabs on the cover with slots on the thermostat, then push gently until the ...

If your Honeywell thermostat is flashing cool on, it could be due to a delay mode, a clogged air filter, a shorted contactor, or other issues. Troubleshooting steps include resetting the thermostat, checking the contactor, and cleaning or replacing the air filter. Clogged Air Filters. One of the most prevalent causes of a Honeywell thermostat ...To wrap it up, if you find the purge light on your Honeywell mini zone controller blinking, it indicates a potential issue with the discharge air sensor or other components of the system. Remember to ensure that the discharge air sensor is securely attached and consider replacing it if necessary. Additionally, check for any loose connections ...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. If you have ever faced a problem and are searching for solutions, this is the ...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...II. Cool On Blinking on Honeywell AC Thermostat A. Overview of the Cool On Blinking issue. The cool on blinking issue on a Honeywell AC thermostat is one of the most common problems reported by users. When the cool on indicator light blinks, it indicates that there is an issue with the cooling system or thermostat that needs attention.CLICK LINKS BELOW FOR PRODUCTS IN/RELATED TO VIDEO🍒 Here's my thermostat https://amzn.to/3cMWO9X🍒 Upgrade to this one? https://amzn.to/3Sc8L9v🍒 This one...

Honeywell RTH6580WF Wi-Fi 7-Day Programmable Thermostat. The thermostat was easy to install and works perfectly with the Total Connect Comfort app which is not the same as the Total Connect app we use for our security system on our phones. We can easily control the heating or cooling even if were not home.If your thermostat is in delay mode, the following messages and icons will be flashing on your thermostat display: "Wait" or "waiting for equipment" "Heat" or "Heat on" Fire Icon; Sun Icon; If you see any of the above messages or icons flashing or blinking quickly, then compressor protection is on for your heat pump.Here are the best smart thermostats, to help you control heat and air conditioning with your smartphone — and to help save money. By clicking "TRY IT", I agree to receive newslette...May 27, 2010 · Okay, let's try this: first, turn the thermostat off, then remove the batteries from the thermostat and leave out until the display goes completely blank. Now, reinstall the batteries and turn the switch back to cool and lower the desired temp below the indoor temp. The 'cool on' may flash, but leave the thermostat alone for 5-10 minutes and ...If you have a Honeywell T5 thermostat, then you may have noticed that it appears to be flashing or blinking cool. This is actually quite common and can indicate a few different issues. First of all, the thermostat might need batteries replaced, as its low battery warning system will cause the screen to flash ‘cool’ when the power supply is ...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.

EDIT: According to this manual for your thermostat That looks like the "Fan" icon. According to that manual on page 4 it says: "The COOL ON, HEAT ON or icon will display when the COOL, HEAT, or (fan) is on. Note: The Compressor delay feature is active if these are flashing."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.’. Once you’ve made the adjustments, wait …1. Dead Thermostat Batteries ( Even if you bought them recently) Main Fix: Replace the Batteries. Honeywell thermostats often rely on battery power. If if you bought them recently and they are new, they may have been exposed to conditioned which might have killed theme. When the batteries are low or completely dead, the screen may go blank.Sep 8, 2022 · If the batteries are low or installed incorrectly, the thermostat may not function properly. Next, check to see if the furnace filter needs to be replaced. A dirty furnace filter can cause the thermostat to malfunction. Finally, consult your Honeywell user manual for further troubleshooting tips. Thermostat Cool On or Heat On flashingResetting the Honeywell thermostat to the default factory setting will delete all your saved settings. Follow the steps below to reset the Honeywell Vision Pro 8000 series. Press the "MENU" button. Go to the "PREFERENCES" tab. Scroll down and click on "RESTORE TO FACTORY DEFAULT.". Tap "YES" to confirm the factory reset.

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The engine thermostat regulates the amount and speed of engine coolant that passes from the radiator into the engine passages. The thermostat closes, preventing water flow when the...Installing your thermostat 9e Select your system type and touch Next. The system type determines other selections for completing initial setup. Use the checklist from Step 6A-d when making selections. 9f Touch Next after making selections on each screen. Next 9g Touch Done on the last screen.Verify the fan setting: Set the fan setting to “Auto.”. This ensures that the fan will turn on automatically when the cooling system is activated. Double-check the mode and time settings: Ensure that the thermostat is correctly programmed with the desired mode and time settings. Incorrect settings can cause the “Cool On” message to appear.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. A blinking "Cool On" indicator on a Honeywell AC thermostat can indicate various problems, such as a wiring issue, a faulty temperature sensor, or a ...Dec 29, 2023 · The Honeywell th ermostat red light might pop up due to a range of common issues. Firstly, check the battery – a low battery can trigger the red light. Secondly, ensure that the heating or cooling system is functioning correctly; disruptions can also cause the red indicator. Thermostat malfunctions or wiring problems might be behind the red ...If you don’t have it, you can contact the Honeywell customer helpline or research online according to your thermostat’s model. Final Words. If you notice your Honeywell thermostat green light staying on flashing during installation, setting up, connecting to pairing to some device, or operating modes, it is entirely normal.

This Cool Only Honeywell Home Econostat has a sleek design and an integrated thermometer and temperature setting scale. It mounts directly to a wall or outlet box. ... Cool Only Thermostat- Dual Scale Fahrenheit and Celsius. Heat Only - 50-90 F 15-30 C for Vdc and millvoltage systemsHoneywell 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.Electronic Thermostats. An electronic thermostat runs on an automatic switch, turning your AC on and off at certain temperatures. Common issues include: Compressor protection: A "cool on" or "heat on" message may appear along with a flashing light. Low batteries: Replace the batteries periodically, even if there is no "Replace bat" message .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.’.We already explored the possible causes of your Honeywell thermostat blowing cold air during the heat setting, Now let's proceed with a comprehensive step-by-step troubleshooting guide to help you pinpoint and resolve the issue: 1. Check Temperature Setting. - Verify that your thermostat is set to the desired temperature in heat mode.Oct 15, 2022 · Sometimes, all you would have to do to get rid of the blinking ‘cool on’ message is reset the thermostat. If your thermostat has batteries, then insert those backward for 5 seconds to reset the device. To reboot other Honeywell Pro Series thermostats, you would have to: Turn the device on. Press and hold the ‘menu’ button for 5 seconds.Jul 24, 2013 · Heat and cool settings must be at least 3 degrees apart. The thermostat will automatically adjust settings to maintain this 3-degree separation (called “deadband”). The 3-degree separation between heating and cooling set temperatures is fixed, and cannot be changed. Press system button until screen. Fan System.Honeywell Thermostat Flashing Cool on After Changing Batteries . After changing the batteries in your Honeywell Thermostat, you may notice that the display is flashing ‘Cool.’ This indicates that the thermostat is ready to be programmed and has been reset. The next step is to program it according to your home’s heating and cooling …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.Steps To Troubleshoot Issues With 'Cool On': Honeywell Thermostat. The 'Cool On' indicator flashing on your Honeywell thermostat should normally resolve itself within 5 minutes. However, if that does not happen, you can use the steps below to troubleshoot the issue and resolve the problem. Set Thermostat To Lowest Temperature SettingTo 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.CT30/CT33 Low-voltage Thermostat 5. Set adjustment lever (CT30 only) 1 Separate cover from thermostat, and remove the plastic insert. 2 Use a pencil to move the adjust- ment lever to the proper setting for your system (see table below). Finish installation. 1 Align the 3 tabs on the cover with slots on the thermostat, then push gently until the ...

How often do you hear from customers who say their Honeywell thermostats are blinking "cool" or "off"? If you're having trouble with your Honeywell thermostat, don't worry - you're not alone. Honeywell has been around since 1884, and they've been innovating ever since. The company was founded by Charles F. Brush, who wanted to create

When you have achieved connection, try switching back to the 5GHz channel. Your smart thermostat may remain connected but it may not. If the issue does not go away, you may have to switch to 2.4GHz permanently. The drop in speed is not drastic. Moreover, the switch to 2.4GHz will provide a much broader range, too.The reason the light is flashing is that the power outage has switched the thermostat back to setup mode. When a Honeywell thermostat is in setup mode it normally causes the "Cool on" light to blink. If the thermostat shows you that it is in setup mode you just have to set your thermostat again and the problem will be solved automatically.Sep 13, 2023 · If your Honeywell thermostat isn’t turning on the heat, it could be caused by a few different issues. The most common is a lack of power, which could be due to a tripped circuit breaker or blown fuse. Additionally, you may need to check that the fan switch is in the “On” position and that both batteries are fresh and inserted properly.Sep 24, 2021 · Here are the main reasons why your Honeywell thermostat is blinking “Cool On”: A power outage: A power outage or some other interruption associated with a power source can trigger the thermostat’s compressor to restart and activate the ‘Cool On’ icon to blink. Chaining the Set Temperature: Readjusting the temperature manually after ...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 SupportThe 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...I have a pro 3000 Honeywell non-programmable thermostat. Everything was working fine, then we left town for a few days, and it no longer works properly. The fan and cool air will kick on but the heat … read more

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The Honeywell thermostat system says wait on cool when it is prolonging an activation of your HVAC system. Most commonly, this is done to protect the HVAC system compressor. The compressor is responsible for circulating the refrigerant through your unit and helping it to cool down the air that enters your home. If your air conditioner has been ...View and Download Honeywell RTH221B user manual online. Owner's Manual. RTH221B thermostat pdf manual download. Also for: Rth221, Rth221b1021. ... When Cool On is flashing, this means the compressor protection is engaged ... Thermostat Honeywell RTH2300 Series Quick Installation Manual. Programmable (56 pages)A blinking snowflake on a Honeywell thermostat is mostly caused by activated delay mode or an activated saver switch (if you are subscribed to one). This issue can be fixed by simply waiting for the delay time to elapse which is typically about 5 minutes or switching the saver switch off, respectively. Also read: Honeywell thermostat blinking ...Mar 24, 2023 · Reattach the thermostat cover: Once the new battery is inserted, snap the thermostat cover back into place. Turn the power back on: Finally, turn the power back on to the thermostat by flipping the circuit breaker back on. After replacing the battery, wait for a few minutes to see if the low battery warning message or symbol disappears.Honeywell AC thermostats have a cool-on blinking light that indicates the unit is working to cool down the room. This could be due to either an incorrectly set temperature or because of an issue with the thermostat itself. If you find your Honeywell AC thermostat's cool on light blinking, first check and make sure that you have selected a ...First check that the thermostat is set to the Heat position. Make sure the temperature is set higher than the Inside temperature reading. Also check the circuit breaker and reset if necessary. Make sure that the furnace door is closed securely. If "wait" is in the screen or "heat on" is flashing - wait 5 minutes for the system to ...Apr 25, 2023 · Honeywell Thermostats. If you have a blinking or flashing snowflake on your Honeywell thermostat, or the word heat/cool is blinking, it means your thermostat is in delay mode. Your system should cycle on in five minutes but check the possible causes above for delay mode. Check for possible causes if your thermostat is in delay mode.Follow in these steps. Step 1. Go to the thermostat configuration and enter the correct system type and change the reversing valve setting. Step 2. Remove the thermostat cover from the wall and don't forget to take a snap of the current wiring (you may need to restore your wiring to the current one.) Step 3.Aug 8, 2023 · Honeywell Thermostat Flashing Cool on After Changing Batteries . After changing the batteries in your Honeywell Thermostat, you may notice that the display is flashing ‘Cool.’ This indicates that the thermostat is ready to be programmed and has been reset. The next step is to program it according to your home’s heating and cooling needs.Read also: Honeywell Thermostat Flashing "Cool On" [7 Easy Fixes] 5. Furnace Ignition Problems. If you use a furnace for heating and your Honeywell thermostat says heat on but no heat coming through, there could be problems with your furnace ignition. Some issues that prevent your furnace from igniting include. Closed gas valve; Dirty flame ... ….

In this article, we will discuss the potential causes and fixes for a Honeywell thermostat blowing a fuse. When your nest or honeywell thermostat keeps on blowing the fuse, this is likely caused by a short between R and C terminals causing the fuse in the furnace control board to blow. While this can be frustrating, a fuse typically blows out ...Honeywell Programmable Thermostats service as an excellent alternative for their overall utility and ease of use. You'll be able to set your temperatures preferences in advance via a 5-2 Day, 5-1-1 Day and 7-Day schedule. Separate programming for weekdays and weekends will allow you to alternate heating and cooling for when you need it most.Supposing you're experiencing and Honeywell thermostat cool on flashing problem, there are some troubleshooting action that can help. Read this blog post fork more info. 302-022-7810If you use a touchscreen model, press the “Menu” button to access the settings. On settings, scroll through the menu to find the “Reset” or “Factory Reset” option. Once you find it, select it. Now, your thermostat should prompt you to input your password to confirm the reset. Input your correct password now.1. Turn off the power: Before you start checking the wiring, switch off the power to your HVAC system to avoid any accidents. 2. Open the thermostat: Remove the thermostat cover to access the wiring connections. 3. Check the wires: Ensure that the wires connected to the thermostat are correctly placed. The "C" (common), "Y" (cooling ...Lets look at the jumpers on the rear of the thermostats circuit board. J7 needs to be set to GAS or ELEC based on your system type.8.5 GAS/ELECTRIC MODE J7 This setting changes how the system's blower fan (if applicable) is controlled while in HEAT mode, and with the Fan switch in the AUTO position.May 12, 2023 · 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 SupportMay 13, 2022 · While on a thermostat, the ‘return’ message simply indicates a certain part of the programmed schedule, the ‘return’ in an air conditioner usually refers to the return air vent. Return air vents suck in the air from the rooms in your house and send it to the air conditioning or heating unit through the ducts. So, these vents ‘return ...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 from short cycling, a phenomenon that can cause damage. Cool on flashing on honeywell thermostat, May 5, 2021 · How to Fix Honeywell Thermostat Flashing Return Step one: Setting the time. Start by pressing and holding down the “ SET ” function until the date or time flashes. After display flashes, use arrow functions to alter and set the correct time. Honeywell Thermostats are equipped with arrow buttons that are essential and handy., 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 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., View and Download Honeywell Home 9000 Series user manual online. Smart Colour Touchscreen Thermostat. 9000 Series thermostat pdf manual download. Also for: Th9320wf3003. ... Page 49 Glossary Heat Pump heating/cooling system Heat pumps are used to heat and cool a home. If your old thermostat has a setting for auxiliary or emergency heat, you ..., 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., Check that all vents in your home are open and unobstructed. Move any objects that may be blocking the vents, such as furniture or curtains. After cleaning or replacing the filters and ensuring vents are open, turn your thermostat back on and set it to “cool.”. Wait a few moments to see if the air begins blowing., Sep 15, 2023 · To set your Honeywell Thermostat to permanent hold, you need to first press the + or – button and adjust the temperature. The thermostat will display ‘temporary hold’ along with a flashing setpoint temperature. While the temperature is flashing, press the ‘hold’ button and change it to permanent hold. I was trying to take a nap on an ..., Sep 15, 2023 · To set your Honeywell Thermostat to permanent hold, you need to first press the + or – button and adjust the temperature. The thermostat will display ‘temporary hold’ along with a flashing setpoint temperature. While the temperature is flashing, press the ‘hold’ button and change it to permanent hold. I was trying to take a nap on an ..., Jan 1, 2024 · 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., 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., The 'Cool On' blinking or flashing on your thermostat safeguards your HVAC system. This indicator activates a five-minute delay to protect the outdoor compressor from damage caused by turning on and off too quickly. This delay feature, especially common in Honeywell thermostats, prevents the compressor from short cycling, which can lead to ..., Conclusion – Honeywell Thermostat Cool On Blinking. In most cases, a blinking “Cool On” indicator on a Honeywell thermostat simply means that there is a delay, and the system will start working normally after about 5-10 minutes. If the problem persists, try bypassing the thermostat or troubleshooting the system further., Honeywell Thermostat - Alert "No power from cooling / heating system". I have 2 Daikin 5 Ton RTU's on top of my business, just over 1 year old. They are controlled by Honeywell 8000 (I believe) T-stats. One of them today has basically gone to an Alert screen and reads the message "No power from Heating/Cooling system"., Confirm the message "Heat On" is solid (not flashing) 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 wire. To operate heating, the thermostat requires power to the R terminal. (If you have a wire in the RC terminal and no wire in the R ..., There is no need to fret if you see a "Return" message on your Honeywell Thermostat. This is entirely usual and is key for the optimal performance of the device. It plays a fundamental role in the main characteristics of the equipment. The "Return" message blinks when it's working in advance to reach set temperatures assigned to the ..., A thermostat with low batteries might have trouble commanding the AC to turn on and off. The AC unit might also not respond to changes you make to the thermostat's settings. In addition, low batteries can trigger the flashing "cool on" message. Most thermostats will notify you if their batteries are starting to run out., Apr 18, 2024 · 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 ..., Mar 2, 2023 · Reasons a Honeywell thermostat keeps rebooting. Replace dead batteries, tighten loose wiring, or replace a failing transformer. Check installation and wiring, replace damaged wiring. Replace faulty high limit switch. Update the thermostat’s software. Replace faulty sensor or relay., If your thermostat is blinking "cool on" one of three things has taken place. Someone tried to restart the compressor before the refrigerant had time to settle. A sudden change from cool to heat, or heat to cool. Changing the batteries in your system may also cause this to happen. Honeywell thermostats are equipped with a second line of ..., In this article, we will discuss the potential causes and fixes for a Honeywell thermostat blowing a fuse. When your nest or honeywell thermostat keeps on blowing the fuse, this is likely caused by a short between R and C terminals causing the fuse in the furnace control board to blow. While this can be frustrating, a fuse typically blows out ..., If the flashing light on your Honeywell thermostat has been on for more than 5 minutes and there is no cooling,. In such a case, resetting the thermostat may resolve the problem. In this blog, we are going to outline the many measures you may take to address the difficulties with 'Cool On' on your Honeywell thermostat. Also, we will talk ..., If you don’t have it, you can contact the Honeywell customer helpline or research online according to your thermostat’s model. Final Words. If you notice your Honeywell thermostat green light staying on flashing during installation, setting up, connecting to pairing to some device, or operating modes, it is entirely normal., Product Overview. Embrace simplicity with The Round Non-Programmable Thermostat. The reliable, readable scale makes setting the exact temperature easy — including a model with large, raised markings and clicks at every 2-degree change so you can see and hear the change. Plus, the popular, familiar design fits effortlessly into your home decor., If you have an older home with an outdated thermostat, you may be missing out on the many benefits that come with upgrading to a newer Honeywell thermostat. One of the key benefits..., Witness the rebirth of your thermostat as it comes to life with a clean slate. Read More: Honeywell Thermostat Cool On Blinking How To Fix. Honeywell Thermostat Reset: A Reset Revolution. Step 1: Navigate to Settings. For Nest thermostat aficionados, the journey begins in the device settings. Access the settings menu, and proceed to 'Reset.', Wi-Fi Smart Color Thermostat. The Honeywell Second Generation RTH9585WF1004 Wi-Fi Smart Color Thermostat is designed to fit the individual. The creation of a custom schedule will satisfy comfort needs while optimizing energy savings. ... Honeywell Home Heat and Cool Non-Programmable Thermostat - CT31A . MPN: CT31A1003/E1 (3) $19.95 Save: $8.00 ..., Check that all vents in your home are open and unobstructed. Move any objects that may be blocking the vents, such as furniture or curtains. After cleaning or replacing the filters and ensuring vents are open, turn your thermostat back on and set it to "cool.". Wait a few moments to see if the air begins blowing., 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.", Normally when the "cool on" light starts flashing on your Honeywell thermostat, it's nothing to worry about. This usually means that the air conditioning unit is starting to get to work.If you leave it for a couple of minutes, the light should switch off when the AC starts to work properly.However,..., 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., 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 "Cool on" message on a Honeywell thermostat is also known as "delay mode". It often flashes in the form of a blinking snowflake or as the word "wait' as well. It's a courtesy message to let you know that the AC will delay in coming on for approximately 5 minutes in order to protect your unit from short cycling which can cause ..., 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 ...