Honeywell ac blinking cool on

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 ...

Honeywell ac blinking cool on. 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”.

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. Built-in compressor protection Setting the fan Touch Fan on the thermostat home screen to

This will activate the cool mode in your LG ac: This indicate LG aircon dry mode: LG aircon auto mode symbol help us get the best comfort temperate automatically: LG aircon fan speed symbol: Use this to reduce the noise level of your LG aircon: LG aircon high power mode symbol allow the ac to reach temperate we set: LG aircon plasmater ionizer ...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".1. Airflow Issue. A dirty filter, dirty/frozen coils, blocked/leaky vent, or lack of clearance. Clean the filter and coils (if dirty), clear frost from frozen coils, unblock the exhaust vent (if blocked) or replace it (if leaky) and create enough clearance around the AC (if it’s leaking) 2. Thermostat Issue.1. Airflow Issue. A dirty filter, dirty/frozen coils, blocked/leaky vent, or lack of clearance. Clean the filter and coils (if dirty), clear frost from frozen coils, unblock the exhaust vent (if blocked) or replace it (if leaky) and create enough clearance around the AC (if it’s leaking) 2. Thermostat Issue.Mar 13, 2022 ... Honeywell 6000 Thermostat - Service Champions Heating & Air Conditioning. Service Champions Plumbing, Heating & AC•580K views · 6:00. Go to ...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.I replaced an old mercury switch thermostat with a new Honeywell RTH6580WF and connected the wires according to the 'heat pump' directions in the Honeywell manual. I have a Carrier Model 40AQ03000BB ( …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.

To resolve this issue, follow these simple steps: First, turn off the humidifier and unplug it from the power source. Allow the unit to cool down for a few minutes. Locate the water tank and carefully remove it from the base of the humidifier. Fill the tank with cool water up to the maximum limit indicated.Confirm the message "Cool On" is solid (not blinking) on the thermostat display. Confirm your wiring is correct, and the wires have good contact in the terminals …Sep 8, 2022 · If your Honeywell thermostat is displaying a “Cool On” message and blinking, but the unit is not actually cooling, there are several potential causes. First, check to make sure that the batteries in the unit are fresh and have enough power. Next, check that all of the wires are properly connected. If everything looks good there, then the ... 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 coming is clogged filters and fan blades. Since they work with air, filters and blades regularly come into contact with dirt and dust, so it's not surprising that they experience this issue.When your thermostat says “cool on” but there’s no air, it could be due to issues with your HVAC system like a tripped circuit breaker, a clogged filter, or a refrigerant leak. First, check your thermostat settings, ensuring it’s in “cool mode” and set to the correct temperature. If the settings are right, try resetting your ...The low refrigerant level is the most common reason the Honeywell HZ311 is showing a red light. It results in the HVAC system not being able to cool the air effectively, so warm air circulates throughout your home. In this case, the compressor will continue to work non-stop, trying to cool the air to the desired temperature, which, in the end ...Locate the system Slider Switch labeled Heat Off Cool. Slide the switch to the desired setting and either manually adjust the arrows to the desired set point and press hold or establish a schedule for heating and cooling.

If the room temperature is below the heat set point, the thermostat display should indicate a call for heat. 2. Confirm that the circuit breakers are on. 3. If you installed the thermostat yourself, ensure that the wires are matched correctly and securely connected at the thermostat. 4.Honeywell Thermostat Blinking Cool On But Not Working Smart AC Solutions Thermostat Won't Turn Heat (or A/C) ON how to troubleshoot the room thermostat thermostat wires How to Fix Honeywell Thermostat Red Light THERMOSTATINGHoneywell is one of the biggest names in home heating. Whether it’s a basic analog thermostat found in an older house or a state-of-the-art smart home interface that manages heatin...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.Fix 4: Update Firmware And Restart. To troubleshoot the Honeywell T5 thermostat, start by checking for firmware updates. Install the latest version if available. Next, turn off the power to the thermostat and then turn it back on to perform a restart. Give the thermostat some time to reset and reestablish its connection.Sep 19, 2023 · If the thermostat is blinking cool on but not working, this could indicate a power issue. Make sure to follow these steps to troubleshoot the problem and resolve it. Step 2: Check Thermostat Settings. When troubleshooting a Honeywell thermostat blinking cool on but not working issue, it is essential to check the thermostat settings.

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Opening your Honeywell thermostat is a fairly simple and quick task. There are two different kinds of openings that Honeywell thermostats have. They either have a slide or swing op...Step 1: Wait 5-10 minutes. When a Honeywell thermostat clicks but nothing happens, your first action should be to wait 5-10 minutes. This is because of the compressor protection feature which prevents your HVAC system from turning on too quickly after events like power cycling, power outages, flipped switches or tripped breakers, or even after ...Check the AC mode setting. First, you'll want to check that the air conditioner mode is set to the correct setting. Most portable air conditioners have three settings: "Cool", "Dry", and "Fan". Ensure that your AC is set to "Cool" mode and see if it starts blowing cold. The "Mode" button on this portable AC is used to ...To help clean the system, you can add a small amount of vinegar to the water tank and run the air cooler in evaporative cooling mode for 15 to 30 minutes; then, drain the tank of the vinegar water and refill with fresh, clean water, running on evaporative cooling mode for another 15 to 30 minutes. This will help to break down the calcium deposits.Troubleshoot Honeywell Thermostat Flashing Cool On or Heat On with our clear and concise guide and restore your HVAC system.

I just bought a Honeywell 5-2 Day programmable thermostat (RTH635OD) to activate my air conditioning and Heat Pump. There are four wires (existing) in the wall where the old thermostat existed (I took … read moreHere 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 ...A blinking ‘Cool On’ thermostat might be resolved by performing a reset and reprogramming the thermostat. To do this, consult your thermostat’s manual for instructions on resetting and reprogramming. It may involve a simple restart or a complete factory reset, which would erase all previously programmed settings.Jan 28, 2022 · Generally, the device should stop blinking “cool on” after 5 minutes, signalling that cool air has been restored and that the HVAC system will continue functioning normally. Sometimes, this may also occur if your AC unit has lost power. Hence, there can be two main reasons why your Honeywell thermostat is blinking cool on: Nov 24, 2022 · 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. MN12CES&MN10CESWW_IM_Eng_USA_10. Read all instructions carefully before setting up and operating the unit. Keep this. instruction manual for future reference. This manual is designed to provide important. information needed to setup, operate, maintain and troubleshoot your portable air. conditioner.It’s turned on the air conditioning cooling unit in your home. This flashing light is a sign that your HVAC system’s safety measures to protect the compressor are in …Oct 4, 2023 · In summary, when faced with the Honeywell Pro Series Cool On Blinking issue, it is essential to check the power source, perform a thermostat reset, and adjust the fan settings. By following these possible , you can troubleshoot and resolve the blinking light problem, restoring the proper functionality of your Honeywell Pro Series thermostat. 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.However, if the cooling system is not working correctly, you may see this indicator flashing. Common Causes of the “Cool On” Flashing Issue. Several factors can lead to your Honeywell thermostat flashing “Cool On.” Understanding these causes is crucial in determining the appropriate solution. Here are some common reasons:

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 ...

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.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 ...I have a Honeywell thermostat. It is blinking cool on, but the AC never comes on. The heat does not come on either. I - Answered by a verified HVAC Technician. ... I have an AC system with a Honeywell 4000 thermostat. Dual zone system. The downstairs zone is not working, and the thermostat just keeps flashing cool. ...Actionable Steps for Troubleshooting Honeywell Thermostat "Heat On" Blinking. Use the flowchart below to methodically troubleshoot and resolve the Honeywell thermostat "Heat On" blinking: Now let's explore Honeywell blinking scenarios in more detail: Scenario 1: Normal Delay Mode. If you see "Heat On" blinking on your Honeywell ...You'll have to look in your thermostat's manual to find the specific unlocking procedure for your Honeywell thermostat model. With some models such as the T4 Pro, you must press the "+/-" or "up/down" buttons and then press "Cancel" or "Remove hold.". You can deactivate the Lyric T5 Wi-Fi by pressing "Permanent Hold" and ...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...Hunter thermostat model 44110 is blinking 2.. yes, I get that if you hold the up and down for three seconds, you get the option to change the span of how it runs,1 less often, 2 ideal, 3 for more ofte …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.Why is my Honeywell Thermostat Blinking Cool On? Five-Minute Compressor Delay. Low Thermostat Batteries. Power Outage. AC Unit Malfunction. …

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What does the blinking Cool Dwn mean on the thermostat. ... Heating, refrigeration and air conditioning. 419 satisfied customers. Honeywell programmable thermostats. thermostat will shut off. ... My Honeywell thermostat is set to cool, I can see that the compressor is running, and the fan is running on the furnace, however it is not cooling the ...On a Honeywell thermostat, a message that says ‘temporary’ indicates that the device is on a temporary hold. During this period, the thermostat will keep the temperature in your house at a certain setting. Once the temporary hold expires, the device will get back to its normal schedule. You get to decide when the temporary hold should …Congratulations on your purchase of this versatile Honeywell Portable Air Conditioner. Important: Before installing the unit, place it UPRIGHT for 1 hour before use to allow the refrigerant to stabilize. ... Air Conditioning Mode (COOL) Adjust fan speed and air temperature to suit your desired comfort level. Temperature setting range is 16°C ...Generally, the device should stop blinking "cool on" after 5 minutes, signalling that cool air has been restored and that the HVAC system will continue functioning normally. Sometimes, this may also occur if your AC unit has lost power. Hence, there can be two main reasons why your Honeywell thermostat is blinking cool on: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.You'll have to look in your thermostat's manual to find the specific unlocking procedure for your Honeywell thermostat model. With some models such as the T4 Pro, you must press the "+/-" or "up/down" buttons and then press "Cancel" or "Remove hold.". You can deactivate the Lyric T5 Wi-Fi by pressing "Permanent Hold" and ...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.One is working fine while the other thermostat has power but won't run. It clicks when I set the temp as if it's starting to run or turn on but I get nothing. For reference I have a Honeywell intelligent T5 thermostat. Wondering if this is something I can troubleshoot myself as my AC guy is on calls for rest of today. ….

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.Is your Honeywell Thermostat's Cool On light started to blink? Or Your Honeywell Thermostat Not Working at all! Don't worry. It is a far more common problem than you may think. In fact, in 90% of cases, it isn't really going to be a massive problem. It is just a 'feature' of the Honeywell Thermostat...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 ...If you're experiencing the Honeywell thermostat cool on blinking problem, there are some troubleshooting stepping that can get. Read this blog post for get info. 914-666-9100Honeywell 4000/7000/9000 Thermostats. Press the "Menu" button on your Honeywell 4000/7000/9000 thermostat. Scroll to "System Configuration" and press "Enter". Scroll to "Restore Default Settings" and press "Enter". Confirm the reset. After you've completed the reset, any custom settings you've previously programmed on ...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 ...Why is my Honeywell Thermostat Blinking Cool On? Five-Minute Compressor Delay. Low Thermostat Batteries. Power Outage. AC Unit Malfunction. …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 ...To help clean the system, you can add a small amount of vinegar to the water tank and run the air cooler in evaporative cooling mode for 15 to 30 minutes; then, drain the tank of the vinegar water and refill with fresh, clean water, running on evaporative cooling mode for another 15 to 30 minutes. This will help to break down the calcium deposits.Problem with AC unit. I have the honeywell HZ322 controlling 3 zones using the honeywell focuspro th5000 thermostats. Downstairs which is on one's own doesn't respond to the thermostat keeps getting hotter and hotter and will not cool. Master bedroom on another zone keeps getting colder and colder with the thermostat turned off. Honeywell ac blinking cool on, Heat On/Cool On (If flashing, see page 9) System setting Heat/Cool/Auto/Off/ Em Heat (see page 7) Fan setting ... where both air conditioning and heating are used on the same day. When the system is set ... Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr. N., Golden Valley, MN ..., My honeywell thermostat is flashing a code that looks like 11n and it makes a clicking sound. I work for an apartment - Answered by a verified HVAC Technician ... my cool on light is blinking on my honeywell thermostat and the ac is not working ... I have a York Diamond 90 heating/ac unit in my apartment. I was the first resident, so I would ..., 1. Airflow Issue. A dirty filter, dirty/frozen coils, blocked/leaky vent, or lack of clearance. Clean the filter and coils (if dirty), clear frost from frozen coils, unblock the exhaust vent (if blocked) or replace it (if leaky) and create enough clearance around the AC (if it’s leaking) 2. Thermostat Issue., 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., 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 ..., So, first, try changing the temperature on your Honeywell thermostat. Also, make sure the desired temperature falls within the acceptable ranges. Specifically, set the heating between 40 °F to 90 °F (4.5 °C to 32.0 °C) and the cooling between 50 °F to 99 °F (10.0 °C to 37.0 °C). If you go beyond these ranges, the HVAC system won’t ..., 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., 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 ..., Wait for 3-5 minutes. If it's still blinking after that, we might need to dig a bit deeper. 2. Power Loss to Condenser Unit: Cause: If you use a heat pump, there's an outdoor unit called the condenser. If this loses power while your thermostat is asking for heat, it gets confused and starts blinking. Fix:, 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..., Check the circuit breaker to your equipment. Confirm the thermostat is set to Cool mode and the setpoint (the smaller number at the top of the thermostat display), is set to a temperature lower than the display temp (the larger number in the center of the display). Confirm the message "Cool On" is solid (not blinking) on the thermostat display., 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 ..., Poe. The "cool on" blinking indicator on a Honeywell thermostat is a sign that the thermostat is in a delay mode [2]. This delay mode is designed to protect your HVAC (heating, ventilation, and air conditioning) system from short cycling, which is the rapid turning on and off of the system [2]. Here is the meaning and possible causes of the ..., 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 ..., Locate the flame sensor—refer to the user's manual if necessary. Carefully remove the sensor. Clean it with fine emery cloth or sandpaper. Reinstall the sensor and turn the power back on. Test the water heater. If it's the flame sensor causing the issue, this cleaning should resolve the seven-blink code., 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., 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 ..., To resolve this issue, follow these simple steps: First, turn off the humidifier and unplug it from the power source. Allow the unit to cool down for a few minutes. Locate the water tank and carefully remove it from the base of the humidifier. Fill the tank with cool water up to the maximum limit indicated., Nov 24, 2022 · 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. , 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, Mar 13, 2022 ... Honeywell 6000 Thermostat - Service Champions Heating & Air Conditioning. Service Champions Plumbing, Heating & AC•580K views · 6:00. Go to ..., The honeywell thermostat “cool on” blinking means that the device is in operational mode. This basically means that your thermostat is working to regulate the temperature. The AC unit in your home is pumping cool air into the room and trying to cool the temperature. This process typically takes 5 minutes to complete. The Honeywell ..., Hello, I have a Honeywell EIM with a TH6320R 1004 Thermostat. The Thermostat shows cool on blinking. No fan, no compressor. Note: I had waited 5-10 minutes since power-up. Thanks for your advice and i … read more, 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. Built-in compressor protection Setting the fan Touch Fan on the thermostat home screen to, Step 1: Turning Off the Power. Safety first! Before diving into any troubleshooting, ensure the furnace's power is turned off. Locate the power switch near the furnace or the circuit breaker that controls its electricity supply. Switch it off to prevent any electrical accidents while you work on the furnace., 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 ..., 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 ..., If your Honeywell heater is overheating, it could be due to a dirty air filter or a faulty thermostat. Check and clean the air filter and ensure that the thermostat is set to the desired temperature. If the heater continues to overheat, it could be due to a faulty temperature control system. Best to contact an appliance repair person for help., Sep 25, 2023 · 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 ... , 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 ..., I have a honeywell thermostat md TB3026b I have blinking RED light I changed 3AAAbatteries same problem heap pump runs on cool puts out about 74 or 75 degres … read more André R., Do not worry. It’s a much more common problem than you might think. 90% of the time, it won’t be a huge problem. It’s just a ‘feature’ of the Honeywell Thermostat. The only time you need ...