COOL HEAT System Operation indicators: The COOL, HEAT or FAN icon will display when the COOL, HEAT or FAN is on. NOTE: The compressor delay feature is active if these icons are ashing. Page 3 THERMOSTAT OPERATION Easy to use controls Caution: When the battery icon appears replace your AA batteries immediately. Failure to do so may result in ...Step 1 – Set to Thermostat’s Lowest Temperature Setting. When troubleshooting your thermostat’s “cool on,” the best way to start is by setting the temperature at the lowest setting. Check to see whether the thermostat can control the temperature, and if not, try modifying the controller settings.To reset your T701 thermostat, remove the battery cover and then remove the batteries. Wait 10 to 20 seconds and then replace the batteries and the cover. This should reset your thermostat and possibly fix the display issue. But keep in mind that resetting the thermostat will erase all custom settings, so be sure to set up the device …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...To unlock your Carrier thermostat, however, may be due to an accidental lock, just follow the steps below: Press and hold the ‘Mode’ button. Simultaneously press the ‘Up’ and ‘Down’ arrow buttons, and wait for a second. The locked icon should disappear from the screen and you can use the thermostat normally.A dying battery can stop your HVAC system from responding to thermostat setting changes. So, when you set your thermostat to heat, your HVAC system might not respond to that. Other issues caused by a dying battery if failure to turn on and off your heating system. Read also: Honeywell Thermostat Flashing “Cool On” [7 Easy Fixes] 5.Understanding Thermostat Staging. Est. reading time 4 minutes. T721 Thermostat manuals and instructions online. Download Pro1 IAQ T721 PDF manual. ... The COOL, HEAT or FAN icon will display when the COOL, HEAT or FAN is on. ... Day of the week will be flashing. Use the or key to select the current day of the week. Press NEXT STEP;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.The thermostat keeps the compressor off for a few minutes before restarting, to prevent equipment damage. What if “Cool on” blinking lasting longer than five minutes …Carrier thermostat cool on blinking message is, in fact, a helpful one. Whenever Your System Experiences A Delay Mode, The Thermostat Will Start Blinking The “cool On” Message. This Blinking Is Vital Because It Prevents Your Thermostat From Experiencing Short Cycling. The Duration Of This Blinking Message Would Be 5 Minutes …Incorrect thermostat settings can lead to the cool on blinking issue. Double-check that the thermostat is set to cool mode and that the temperature settings are appropriate for your comfort. 2. Faulty wiring connection. A loose or faulty wiring connection between the thermostat and the HVAC system can cause the cool on blinking issue.Follow the steps below to reset your Bryant thermostat: Locate the circuit breaker panel in your home. Next, find the circuit breaker for your Bryant thermostat. Flip the breaker off. Then wait 5 minutes and flip it back on. Note that this method works for all Bryant thermostat models, including the Bryant Evolution Connex.Jul 2, 2022 · Is you house HVAC thermostat blinking "cool on" or "heat on" and does not turn on the furnace or air conditioner? This is most often caused because power was... Aug 28, 2023 · 1. Wait For 10 Minutes. Before you decide to fix the Honeywell thermostat cool-on flashing error, you must wait for about 5 to 10 minutes. As there is a good chance that your thermostat is going through a restart or running some checks. Or it might be facing a slight delay or using the compressor protection feature. Oct 22, 2021 · Reset the Thermostat. If your thermostat continuously blinks COOL, the blinking indicates that the thermostat is sending a command to the HVAC system to begin cooling the air in your home. If your Braeburn thermostat doesn’t send the correct codes, the HVAC system won’t recognize the message and won’t respond. Jun 3, 2023 · Power outage or any interruptions in the power cause the thermostat to automatically switch to the setup mode. This is also one of the reasons why you find your Honeywell thermostat flashing cool on. Keep an eye on the clock and review all the settings accordingly. 3. Check Whether the Batteries Are Working. 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.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 …Turn the dial for measuring 24 Volts AC. Use one of the probes to touch the red wire. The other probe should be touching any of the green, yellow or white wires. If the reading is anywhere between 22-26, your thermostat is powered. But if the reading is 0, the supply isn’t connected.Since 2011, households have been using Google’s Nest thermostat. Reliable and convenient, the Nest thermostat is one of (now) many smart home automation devices. Convinced? Here’s ...Jul 8, 2020 · The Thermostat Batteries are Low and Need to be Replaced. If your thermostat screen is blinking, it may simply be a sign that the batteries are low and need to be replaced. When your thermostat’s batteries eventually die, you will be presented with a blank display screen — and unable to cool or heat your home. COOL HEAT System Operation indicators: The COOL, HEAT or FAN icon will display when the COOL, HEAT or FAN is on. NOTE: The compressor delay feature is active if these icons are ashing. Page 3 THERMOSTAT OPERATION Easy to use controls Caution: When the battery icon appears replace your AA batteries immediately. Failure to do so may result in ...3. The display is stuck- if this happens, the usual source for the problem is a mistake in the configuring process. When you see the display is stuck, you have to reset the thermostat. To do that, you just need to remove the power supply, wait a few minutes and then reconnect the power and re-configure the device.Cool On Flashing. If your thermostat is blinking “cool on” one of three things has taken place. Someone tried to restart the compressor before the refrigerant …First things first—you should always check the batteries in your thermostat if it’s not turning on your AC. Pull off your thermostat from the wall and check if it has a battery compartment behind it. Change out the batteries, reinstall the thermostat, and check if your AC works. Not all thermostats have batteries—but it’s a good thing ...Sometimes, you might see the reading on the screen is blinking heat on. Generally, the Honeywell thermostat blinks for protection purposes. A blinking heat on signal indicates that a safety timer’s tripping that will protect the compressor of your thermostat. Sometimes, it might indicate a low battery.The easiest way to create a portable QuickBooks database that you can access from different unconnected computers is to store the company file on a flash drive that you can physcia...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.In this article, we will explore the possible reasons behind a blinking thermostat and provide you with some solutions to fix it. Understanding Thermostat Blinking. Thermostats typically blink the selected mode word (Heat, Cool) during a programmed wait time. This feature is built into the thermostat’s program and is usually adjustable.Understanding Thermostat Staging. Est. reading time 4 minutes. T721 Thermostat manuals and instructions online. Download Pro1 IAQ T721 PDF manual. ... The COOL, HEAT or FAN icon will display when the COOL, HEAT or FAN is on. ... Day of the week will be flashing. Use the or key to select the current day of the week. Press NEXT STEP;Thermostat Quick Reference 4 5 Thermostat Quick Reference Displays the user selected setpoint temperature. System Operation Indicators: 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 icons are flashing. The compressor will not turn on until the 5The thermostat blinks cool and on because there may be a problem with the cooling system. Conclusion. To sum up, if you find your Honeywell thermostat blinking “Cool On” but not working, there are a few possible causes and solutions. First, check the power source and make sure it’s properly connected. If that’s not the issue, consider ...My thermostat is flashing cool on.That’s normal for many thermostats when the air conditioner is engaged.I don’t want the air conditioner engaged.Maybe you t...If the thermostat is set to cool, but the system is not turning on, check if there is a delay. Some systems have built-in delays to prevent short cycling. Typically, when any HVAC system is undergoing system time off delay, there will be a snowflake icon blinking on the thermostat display. Sometimes it will just be the word ‘cool’ or the ...The fan seems to be working, but no air comes from the vents and the fan outside for the outside is not spinning like the downstairs one is. HVAC Technician: gotoman for ac. It is probably getting late but check breaker on unit and also check float switch located on inside unit. It is set to open up and trip if drain backs up.Pull on pants are a great way to look stylish and put together without having to fuss with zippers or buttons. Rafaella pull on pants are the perfect choice for busy women who need...Jun 18, 2017 ... I had no power to my Honeywell VisionPro IAQ thermostat. The fix was way easier than I thought. Saved me a bunch of money.Mar 1, 2024 · By adhering to these troubleshooting steps, you can systematically address potential issues and gain valuable insights into the root cause of the flashing “Cool On” message, thereby paving the way for effective resolution. Check if your thermostat is set to “cool” mode and the temperature is set lower than the current room temperature. Honeywell Thermostat Cool on Blinking: Save More. Most of the people are beginning to suggest this excellent one and since it’s holding multiple features and advantages with it so don’t miss this unique one for any cause. This may be the right option to control the temperature and zip will restore its value at any time.In a matter of minutes, the air should kick on and the snowflake will remain solid. If the blinking does not stop, the next step is to switch the dial to “off.”. Perhaps the thermostat did not properly relay to the HVAC system. By moving the switch to “off” and then back to “cool,” you can start the system up again.Check the Battery. If your the screen on your thermostat is blinking, it may just mean that the battery is low, and this is simply your unit’s way of telling you to replace its batteries before it dies entirely. If this is the case, unscrew the thermostat from your wall and replace its batteries. If the unit continues to blink, you may have a ...Final Thoughts. The reason why Honeywell thermostat blinking cool on is maybe the thermostat devices taking delay time to prevent the AC from short cycling. However, the cool on flashing may indicate that the AC is pumping cool air into your home. The blinking is supposed to go away within 5 minutes.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...By adhering to these troubleshooting steps, you can systematically address potential issues and gain valuable insights into the root cause of the flashing “Cool On” message, thereby paving the way for effective resolution. Check if your thermostat is set to “cool” mode and the temperature is set lower than the current room temperature. Stage 1 Thermostat Meaning. Single-stage systems use one heating and cooling output level. As such, they use single-stage thermostats. It uses two-thirds of the compressor capacity while stage two uses the full compressor. But that description of the differences between stage 1 and stage 2 thermostats won’t help you unless you know what ... Troubleshooting steps involve checking voltage, cleaning the thermostat and disk blade, and cleaning the drain line. For resetting the thermostat, you can select ‘mode’ and then ‘off’, flip the circuit breaker off and then on, and switch the mode to ‘auto’, ‘fan’, ‘cool’, or ‘heat’. When it comes to HVAC systems, it’s ...Honeywell Thermostat Cool on Blinking: Save More. Most of the people are beginning to suggest this excellent one and since it’s holding multiple features and advantages with it so don’t miss this unique one for any cause. This may be the right option to control the temperature and zip will restore its value at any time.Nov 19, 2022 · When the “Cool on” light blinks on your Honeywell thermostat, it’s not necessarily a sign that there is something that needs fixing. When the light blinks only for a few minutes and then turns off or becomes a solid light, it means your air conditioning unit has started to work. How To Fix A Thermostat That Blinks Cool Or Off. If you’re getting a flashing light on your thermostat, it could mean that something is wrong with your thermostat. There are several reasons why your thermostat might blink cool or off: Your thermostat may be malfunctioning. If your thermostat is blinking cool or off, it could be because of a ...A drying battery causes poor performance in thermostat devices and can even cause cool on flashing on thermostat. So it’s important to check this power source in your thermostat or replace the Honeywell thermostat battery.You can easily open the battery compartment and look manually.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 Honeywell thermostat is flashing cool, which is a symbol that means there’s a problem. Your thermostat wants cool air, but the cooling system isn’t working correctly. It can be frustrating, especially on hot summer days when you want your home to stay nice and cool. 2.2. Possible Cause. Several factors can contribute to the cool on ...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. The “Cool On” indicator message on a Honeywell thermostat ...2 Power Cycle Your Thermostat. 2.1 Remove The Thermostat From The Subbase. 2.2 Take Out The Batteries. 2.3 Reinsert The Batteries And Reattach The Thermostat To The Subbase. 3 Reset The Thermostat. 3.1 Switch The Thermostat To The Off Position. 3.2 Locate The Breaker That Powers Your HVAC System And Turn It Off.The flashing "COOL" indicates 5 minute delay. After 5 minutes it should stay continuous cool and unit should come on. the system comes on but short cycles. and then the flashing "cool on" comes back on. thermostat is set to 71, temp is at 77. OK.The flashing "COOL" indicates 5 minute delay. After 5 minutes it should stay continuous cool and unit should come on. the system comes on but short cycles. and then the flashing "cool on" comes back on. thermostat is set to 71, temp is at 77. OK.The thermostat should be installed approximately 4 to 5 feet above the ... Cool Only Systems Millivolt Conventional Systems Yes Yes Yes Yes Yes Yes ... the COOL, HEAT, or (fan) is on. NOTE: The compressor delay feature is active if these icons are flashing. The compressor will not turn on until the 5 minute delay has elapsed. Low Battery ... A blinking “Cool On” message can indicate various causes, such as dying batteries, a power surge, or a power outage. Thermostat batteries generally last for an average of 10 months, making it easy to identify when dead batteries are responsible for the blinking message. However, sometimes a Honeywell thermostat can recuperate after a power ... Troubleshooting guide: Why is your Honeywell thermostat flashing 'Cool on'? Get answers to fix HVAC issues fast...In a matter of minutes, the air should kick on and the snowflake will remain solid. If the blinking does not stop, the next step is to switch the dial to “off.”. Perhaps the thermostat did not properly relay to the HVAC system. By moving the switch to “off” and then back to “cool,” you can start the system up again.Oct 22, 2021 · Reset the Thermostat. If your thermostat continuously blinks COOL, the blinking indicates that the thermostat is sending a command to the HVAC system to begin cooling the air in your home. If your Braeburn thermostat doesn’t send the correct codes, the HVAC system won’t recognize the message and won’t respond. Thermostats normally blink the selected mode word (Heat, Cool) in a programmed wait time. This is built into the program and it is normally changeable. Most …To unlock your Carrier thermostat, however, may be due to an accidental lock, just follow the steps below: Press and hold the ‘Mode’ button. Simultaneously press the ‘Up’ and ‘Down’ arrow buttons, and wait for a second. The locked icon should disappear from the screen and you can use the thermostat normally.To replace a three-wire thermostat, connect each of the three wires to the right connection. The three wires are red, white, and blue or yellow, depending on the manufacturer. If t...Hygrometers are used by many professionals to monitor levels of humidity in the air. So, do need one in your home? Advertisement Air has water vapor — or humidity — we are sensitiv...Luckily this is an easy enough thing to fix. All you need to do is change the batteries in the thermostat. Take a look at the display to see if the “battery low” light is flashing. As soon as your thermostat starts to display this warning, you normally have around 2 months before the power will start to fail.Step 2: Bring down the temperature to the lowest degree. Next, you must determine if your unit is cooling any air at all or not. Here is what you need to do to check this: Ensure that the setting is set to “Cool”. Ensure that the fan setting is set to “Auto”. Set your thermostat’s temperature to the minimum degree.Step 2: Bring down the temperature to the lowest degree. Next, you must determine if your unit is cooling any air at all or not. Here is what you need to do to check this: Ensure that the setting is set to “Cool”. Ensure that the fan setting is set to “Auto”. Set your thermostat’s temperature to the minimum degree.Carrier thermostats can be troubleshooted by looking for common problems and addressing these problems one at a time until the problem is fixed. Some common problems may include a ...2 Power Cycle Your Thermostat. 2.1 Remove The Thermostat From The Subbase. 2.2 Take Out The Batteries. 2.3 Reinsert The Batteries And Reattach The Thermostat To The Subbase. 3 Reset The Thermostat. 3.1 Switch The Thermostat To The Off Position. 3.2 Locate The Breaker That Powers Your HVAC System And Turn It Off.Jan 11, 2024 · The blinking ‘Cool on’ message on your Honeywell AC thermostat usually indicates an issue with the cooling system. It could be due to a dirty air filter, low refrigerant levels, a faulty thermostat, or a malfunctioning compressor. 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.Flashing lights on your thermostat are a sign of this problem. • The Cool On display on your thermostat may flash for a few minutes after you replace the batteries. • A Cool On flash might sometimes be a thermostat’s way of informing you when the battery is low. Although some Honeywell thermostats include a distinct low battery indicator.Non-programmable Thermostat. 1-Heat/1-Cool - TH5110D1022 Large R thermostat pdf manual download. Also for: Th5110d, Focuspro 5000, Th5100d1007/u. Sign In Upload. ... (Cont) 4. Press the Up or Down button to raise or lower the heat temperature setting. 5. “Select Heat/Cool” stops flashing six seconds after the last button press. The ...Tighten Wiring Connections. Inspect wiring terminals on the thermostat and AC control board for looseness. Tighten all loose connections. 13. Cycle AC Unit Power. Turn off the power to the AC unit for 30 seconds, then turn it back on to reset the system and see if the “cool on” flashing light stops. 14.Step 2: Bring down the temperature to the lowest degree. Next, you must determine if your unit is cooling any air at all or not. Here is what you need to do to check this: Ensure that the setting is set to “Cool”. Ensure that the fan setting is set to “Auto”. Set your thermostat’s temperature to the minimum degree.My thermostat is flashing cool on.That’s normal for many thermostats when the air conditioner is engaged.I don’t want the air conditioner engaged.Maybe you t...Jun 28, 2018 · Check the Battery. If your the screen on your thermostat is blinking, it may just mean that the battery is low, and this is simply your unit’s way of telling you to replace its batteries before it dies entirely. If this is the case, unscrew the thermostat from your wall and replace its batteries. If the unit continues to blink, you may have a ... A flashing snowflake icon on an Emerson thermostat may be a normal occurrence or may indicate a problem with your HVAC system. If your Emerson thermostat flashes a snowflake icon, the HVAC system has gone into a time delay mode. This time delay mode is usually caused by short cycling in the system. Airflow problems, faulty …The battery of the thermostat is low. When the cool light on your Honeywell thermostat keeps flashing, it may mean that the batteries are running low. The new thermostat has separate lights that show when the battery is low, but the old one still shows when the battery is low by flashing a message. On average, thermostat batteries last for 10 ...Sep 23, 2023 · 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. Troubleshooting Steps for a Blinking Cool On Signal. Check the Power Source The first step in troubleshooting is to check whether your thermostat is getting proper power. Sometimes, a simple reset of the power source can clear up the cool on blinking on thermostat issue. Reset the Thermostat Many minor glitches can be resolved by resetting your ...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 ...If you’re still facing the cool on flashing issue with your thermostat, it’s important to check the air filter and examine the AC coils. A dirty or clogged air filter can significantly impact the performance of your HVAC system, leading to various problems, including the cool on flashing message.Hygrometers are used by many professionals to monitor levels of humidity in the air. So, do need one in your home? Advertisement Air has water vapor — or humidity — we are sensitiv...Nov 16, 2023 · Easy Fixes for the “Cool On” Flashing Issue. Now that we have identified the potential causes, let’s explore seven easy fixes to resolve the “Cool On” flashing issue with your Honeywell thermostat: 1. Check Thermostat Settings: Ensure that the thermostat is set to the correct mode (cooling mode). Here are some steps you can take to troubleshoot and fix the blinking thermostat issue: Check the Air Filter: A dirty or clogged air filter can restrict airflow, causing the system to overheat and trigger short cycling. If the filter appears dirty, replace it with a new one. Inspect the Thermostat Wiring: Loose or damaged thermostat wiring …If your thermostat is blinking heat on, the device might be in a 5-minutes delay state. Moreover, the thermostat might blink when there is a power loss or low battery. Besides, when the temperature of your AC reaches the set …When your thermostat generates the ‘cool on’ message, it’s processing and will give out cool air, which is normal if it keeps flashing for approximately 5 to 8 minutes. Still, an increase in time indicates that the thermostat has evolved some problems. This happens mainly when the previous battery in the thermostat has stopped working ...A thermostat can flash “cool on” without blowing air due to electrical surges and dying batteries. 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 ...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.
Apr 10, 2023 · The Braeburn thermostat ‘cool’ flashing typically occurs when the thermostat is calling for cooling or when the time off delay is activated. Other times when the outdoor unit is not working or is not properly connected, it can also cause your thermostat to flash ‘cool’. But generally when your braeburn thermostat is flashing cool, there ... . Vision america birmingham
You can try this with the thermostat as well and have it successfully reset by power cycling it. In order to power cycle the thermostat, you have to remove the thermostat from the base and then also remove the batteries. Let the thermostat stay in this position for sometime (say around 15 seconds ). After this you can put the batteries …Check the power to your thermostat. If you’ve blown a fuse, replace it. Switch on any breaker that may have been tripped. If your thermostat takes batteries, change them. If you can still interact with the thermostat, turn it to “heat” and “on.”. Then try “cool” and “on.”. You may be able to isolate the problem to a specific ...System Switch not set toHeat or cool. Set system to cool or heat an either raise or lower set point below room temperature. Loose connection tothermostat or system. Ensure wires are securely attached. Malfunctioning thermostat. Replace thermostat. Dirty filter. Replace air filter. Thermostat needs a reset.To reset the system’s schedule, press the System button. Next, hold the blank box that’s in the center of the screen. When the numbers panel comes up, enter 0165 on the left and the number one on the right. Now press Done and your thermostat should have a reset schedule.Following are the steps to troubleshoot a flashing ‘Cool on’ indicator. Change the temperature to the lowest possible. The first thing you should do is to make …Wait 5-10 minutes. Your thermostat could be facing a slight delay in restarting and activating …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.Jun 19, 2022 ... Honeywell Thermostat Instructions, Wire Terminals, Functions, Color Code! ... Why is my Honeywell thermostat on cool but not working? Λsk Λbout ...Lets delve in the reasons and solutions for why my honeywell thermostat flashing “Cool On”! The Honeywell thermostat is a reliable tool for controlling indoor temperature, known for its user-friendly features and energy efficiency. However, users may encounter the “Cool On” flashing message, which can be puzzling.Jul 12, 2021 · 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.’. The Thermostat Batteries are Low and Need to be Replaced. If your thermostat screen is blinking, it may simply be a sign that the batteries are low and need to be replaced. When your thermostat’s batteries eventually die, you will be presented with a blank display screen — and unable to cool or heat your home.Jan 16, 2022 · If you see your honeywell thermostat flashing cool on, try to turn the thermostat to the lowest temperature. So that you can understand whether your thermostat is working correctly to cool down the climate. To perform the troubleshooting, follow the fixes. Go to your thermostat and touch the mode button .