Honeywell cool on blinking

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. Upstairs zone is working fine, but the downstai … read more

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". Select "HomeKit".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.If you're experiencing the issue of the Honeywell thermostat cool on blinking, you're not alone. This common problem can be solved with a few troubleshooting steps. ... 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 ...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.Jul 10, 2021 · There might be two reasons in Honeywell thermostat’ blinking: 1.With a heat pump installation process, blinks are replaced with “flashing.”. If the thermostat is installed in this type of system, then compressor protection should be checked. To do so one must see if an “on” message appears when pressing either cool or warm buttons on ...Step 4: Press and Hold the Reset Button. With the power off, it's time to press and hold the reset button. Use a small, pointed object such as a paperclip or a pen to press and hold the reset button for approximately 5 to 10 seconds. As you hold the reset button, you may notice the display on your thermostat turning off or going blank.Oct 25, 2023 · 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 ...This mechanism is significant in protecting the compressor from failure-related to unintentional turning the Mode switch from Heat-cool. Conclusion. When you understand everything about thermostat programming, Flashing Return should never challenge you anymore. This guide is handy in helping you fix such issues with your Honeywell thermostat.

Step 4: Press and Hold the Reset Button. With the power off, it's time to press and hold the reset button. Use a small, pointed object such as a paperclip or a pen to press and hold the reset button for approximately 5 to 10 seconds. As you hold the reset button, you may notice the display on your thermostat turning off or going blank.Here’s how to fix it: Make sure the thermostat is set to the desired temperature for heating. Try to change your thermostat settings manually. This can be done by pressing the “Up” arrow. After that, press the option that says “Switch to Permanent Hold.”. Your thermostat setting will then switch by matching the outdoor temperature.Just a quick video showing you how to access the HVAC System Setting Switch. This is the switch which will allow you to change your HVAC over from Air Condi...If your Honeywell Thermostat is flashing ‘Cool On’ , set the temperature to the lowest setting. Then reset your Honeywell Thermostat. I’ve also gone into detail about checking your batteries, AC filters, AC coils, and the …Look for flashing icons or words on the screen. If you see a snowflake, flame, sun, "Heat On," or "Cool On" blinking instead of remaining solid, or the word "Wait," wait 5 minutes. The flashing icons occur when the thermostat is in delay mode, or when the compression protector has engaged.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 ...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.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 ...

Look for the power button on the thermostat and press and hold it for about 5-10 seconds until the display turns off. Once the display is off, release the power button and wait for a minute or two. Then, press the power button again to turn on the thermostat. This should reset the controls and make them responsive again.The Honeywell Top Fill Ultrasonic Humidifier releases a visible cool mist. During cold and flu season or when the air is simply just too dry, the use of a portable humidifier can be invaluable. Featuring a wide tank opening that flips open, this top fill humidifier can be refilled at the tank or sink. This cool mist ultrasonic humidifier uses a dual directional mist outlet that provides ...When I turned it from off to cool it came the origional setting of 72 came up. I moved it to 79 but nothing. However the +1 flashed for a couple of minutes then it stopped flashing. Wvfan79 : Its trying to jump straight in to 2nd stage for some reason. Wvfan79 : ... I have just installed a vision pro 8000 touchscreen from Honeywell. It seems to ...Related Article: Honeywell Thermostat Cool on Blinking. Rate this post. Adrian Simmons (Licensed Appliance Repair Expert ) Adrian is an ISCET licensed professional that has completed the National Appliance Service Technician Certification Exam and has the expertise to diagnose and repair any appliance. He is well-versed in the latest ...Not all thermostats have this feature, so check your manual to see if yours does. If not, your problem could be something else. Solution: If you have a battery tester, take out your batteries and test them. Replace if necessary. If not, replace them anyway and see if that stops your thermostat from blinking. 3.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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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 ...If your Honeywell thermostat displays a “Cool On” message, it simply means that the device is in operation mode. When the cooling message appears, it means your AC unit is at work and filling your home with cool air.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.We're coming to the end of another Evil Week here at Lifehacker and, as usual, it's been loads of fun. Gaze into the face of evil with us for just a while longer, though. And whate...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

Nov 8, 2022 · Check the thermostat display for cooling, usually indicated by the words “cool on” or a snowflake icon. If these icons are flashing, the thermostat is in delay mode, which can last up to 5 minutes. This delay protects your equipment from short cycling.Cant see a model number,The out side unit is not coming on. inside fan is working ,just no cool air. ... We had a brief power outage for approx. 5 seconds and when the power came back on the yellow purge light is flashing on my honeywell minizone controller. ...But, like any electronic device, they can encounter issues from time to time. One such issue is the "Cool On Blinking" error, which indicates a problem with the cooling system. 2. Common Issues with Honeywell Thermostat 2.1. Cool On Blinking. The Honeywell thermostat is flashing cool, which is a symbol that means there's a problem. Your ...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.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.The "cool on" blinking indicator on a Honeywell thermostat is a sign that the thermostat is in a delay mode .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 .. Here is the meaning and possible causes of the "cool on" blinking indicator: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.10 DIY Ways to Fix Honeywell Thermostat Cool On Blinking. Here are 10 common troubleshooting tips to stop your Honeywell thermostat from blinking Cool On: 1. Wait 10 Minutes; As mentioned if the blinking Cool On goes away after 5-10 minutes, the system likely just needed time to start up and begin cooling your home.Dec 2, 2023 · Why is my Honeywell Thermostat Blinking Cool On? Five-Minute Compressor Delay. Low Thermostat Batteries. Power Outage. AC Unit Malfunction. Incorrect Thermostat Settings. Loose Wire Connections. Switching Modes. Faulty Thermostat Wiring. Blown Fuse. Low Refrigerant. How to Fix Honeywell Thermostat Cool On Blinking Light. 1.Heath : To get into the menu press and holf the up arrow and the fan button untill the display changes. Then press the next button until you get to option 15 and on the right side will be a 5 that is the 5 minute delay. Use the up and down arrows to change the 5 to 1 if you want the comprete.r delay to be 1 minu.

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 ...

Heat On/Cool On (If flashing, see page 9) System setting Heat/Cool/Auto/Off/ Em Heat (see page 7) Fan setting Auto/On (see page 6) Quick reference to display screen ... Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of five (5) years ...Lavt batteri: Hvis du bruger en ældre termostat, kan du muligvis se et Cool On-blink, hvis dit termostatbatteri løber tør. Men i nyere modeller har separat lavt batteri signal. Sådan repareres Cool On Blinkende Honeywell-termostat? Hvis din Honeywell-termostat blinker i lang tid, kan der være en teknisk fejl, og du skal fejlfinde den.Jun 10, 2022 · 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.Troubleshooting guide: Why is your Honeywell thermostat flashing 'Cool on'? Get answers to fix HVAC issues fast...Unplug the unit, remove the cover, & look for any loose parts. Tighten any loose screws. Wiggle the humidifier fan to see if it is loose on its shaft. If it is, tighten the mounting fasteners. If the humidifier continues to make noise, call an appliance repair person or take the unit into an appliance repair shop.Blink Charging (BLNK) stock is on the move Wednesday after the company announced plans to take on potential naked short sellers. BLNK joins list of companies taking on illegal shor...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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Understanding the Delay and Duration of "Cool On" Blinking; When you see the Honeywell thermostat "Cool On" blinking, it indicates a delay mode. This delay is designed to protect your heating and cooling equipment from short cycling, which can cause damage. The delay can last up to five minutes under normal operating conditions.If you’re experiencing the issue of the Honeywell thermostat cool on blinking, you’re not alone. This common problem can be solved with a few troubleshooting steps. ... 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 ...Specific Honeywell thermostat models display a flashing ‘heat on’ message when they’re signaling for heat but waiting for the system to start heating. This delay, known as delay mode or time off delay, safeguards your HVAC system from short cycling. Typically, this delay mode lasts 3-5 minutes. However, extended delays might indicate …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.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 ...Aug 4, 2023 · 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 ...The blinking cool setting on your Honeywell thermostat may have left you puzzled in the past, but fear not - the mystery is finally solved. This innovative feature indicates that your thermostat is actively cooling your home, ensuring that you always stay comfortable.Buy the latest honeywell home thermostat blinking cool on VEVOR EU offers the best honeywell home thermostat blinking cool on products online shopping.Not all thermostats have this feature, so check your manual to see if yours does. If not, your problem could be something else. Solution: If you have a battery tester, take out your batteries and test them. Replace if necessary. If not, replace them anyway and see if that stops your thermostat from blinking. 3. ….

1. Pour cool water from a pitcher or jug directly into Water Tank. 2. Fill to the MAX line marked on the outside of the Tank or to the MAX indicator on the Tank Cover. Replace the Tank Cover if it was removed for filling. Option 1: To Fill Tank at the Humidifier Step 1 Step 2 Step 3 Step 4 Step 1 Step 2 Step 4 Step 1 Step 2 1.A blinking flame symbol on a Honeywell Thermostat implies your thermostat has been set to heat mode and there is a call for heat. This is known as the time off delay and is there to prevent your Heat pump compressor from short cycling. Time off delay will typically not take more than 5 minutes. If 5 minutes elapses and the flame symbol ...Wait 5-10 minutes. Your thermostat could be facing a slight delay in restarting and activating …A loose wire is one of the common reasons behind the Honeywell thermostat blinking the HEAT ON. When the thermostat blinks the HEAT ON, your device is in a 5-minute delay to give you heat. But more than 5 minutes is abnormal. The device increases the delay when the wires are loose and fail to signal your HVAC properly.The Honeywell ST9400C manual is an essential resource for anyone who owns or operates a Honeywell ST9400C programmable thermostat. This comprehensive guide will help you understand...Luckily we have covered a guide on your Honeywell hot water heater status light blinking. So, you can go through it in case you want to learn more about it. FAQs: How do I reset my Honeywell water heater? Turn on the pilot, and for 10 seconds, switch the Pilot dial to "Very Hot." Then for 10 seconds, switch the dial to "Hot."It probably means that the compressor is not turning on. Here's how to fix that: 1. Verify that the set point is below the indoor temperature. 2. Verify the "snow flake" icon is shimmering - which may take 5 minutes or longer due to compressor protection. 3. Click here (link to another article) to make sure the Thermostat Configuration is correct.Page 1 NATURAL COOL MOISTURE HUMIDIFIER HCM-530, HCM-535, HCM-540, HCM-550, HCM-560 Series IMPORTANT fied electrician. DO NOT attempt to defeat this safety feature. 6. To disconnect the humidifier, first turn controls to the SAFETY OFF position, then grip the plug and pull it from the wall outlet.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.When Cool On is flashing, compressor protection is engaged (see page 11). 11 Set Cool 77 M32769 On Built-in compressor protection ... Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year Honeywell cool on blinking, 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., However, if the blinking persists, it might signal something that needs your attention. Common Reasons for Honeywell Thermostat Blinking Cool On. System Starting Up The Honeywell cool on blinking is often seen when the system is just starting up. It’s a brief pause to ensure the compressor doesn’t cycle too quickly, usually lasting no more ..., 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 ..., 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..., yourhome.honeywell.com RTH2300/RTH221 Series Programmable Thermostat Identify System Type This thermostat is compatible with the following systems: ... When Cool On is flashing, compressor protection is engaged (see page 14). Current day/time (see page 11) Current program period Wake/Leave/Return/Sleep (see pages 11-13) 11 Set, 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 ..., 000016230. What do the blinking LEDs indicate on the instrument? Solid ON — all modes except Cal. and 4/20 mA calibration. Slow Blink — Calibration mode. Solid ON — Possible catastrophic failure on the circuit board. The 4/20 mA signal will vary depending on the exact failure. In the event of corrupted data, calibration values and Modbus ..., The Honeywell T4 thermostat's blinking cool light might indicate a cooling issue. Conclusion. Troubleshooting the Honeywell T4 Pro thermostat can sometimes be a frustrating task. However, by following the steps outlined in this blog post, you can easily identify and fix common issues that may arise. Remember to check the power source, ensure ..., 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 …, 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 malfunctioning thermostat. By troubleshooting the problem step by step, you can determine the precise cause and take the appropriate action to resolve it. Reasons For The Cool On Blinking …, A loose wire is one of the common reasons behind the Honeywell thermostat blinking the HEAT ON. When the thermostat blinks the HEAT ON, your device is in a 5-minute delay to give you heat. But more than 5 minutes is abnormal. The device increases the delay when the wires are loose and fail to signal your HVAC properly., Cool On or Heat On is flashing Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor (see page 5). 9 Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of, 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 …, Turned everything back on, even reset the T5 thermostat to be safe, and it went through a cool on blinking phase for 5 minutes. It’s now set to cool, but it’s still blowing warm, and the outside AC unit is blowing cold air out. Orange needs to be on O/B terminal, not W, and thermostat needs to be programmed for heat pump., One of the most frequent reasons for a red light is a low battery. When the thermostat's battery power is running low, the red light may start blinking rapidly or remain lit steadily. This signal prompts you to replace the batteries promptly to ensure uninterrupted operation. 2. Heating or Cooling System Malfunction., Warning Light (when flashing) Mode Control Timer Control Timer / Temperature Set Controls Fan Speed Control After switching the air conditioner off, you must wait 3 minutes before switching it back on again. Power Control The Power Control turns the unit on and off. Mode Control 3 settings: Cool, Dehumidify and Fan, If your thermostat has been flashing “cool on” for several minutes and no cool air is coming out, check your thermostat’s settings. A recent power outage could have triggered the thermostat’s “set-up mode,” explaining the blinking message. If it is in set-up mode, change it back to the correct setting. You can go through the ..., Feb 14, 2021 · 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., Fan Setting. - Verify the fan setting. It should be set to "Auto" rather than "On.". In "Auto" mode, the fan runs only when the cooling system is actively cooling the air. - "On" mode keeps the fan running continuously, which can circulate already cooled air, but it won't initiate cooling if the thermostat is set incorrectly., 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., Watch this if you just hooked up your Honeywell Lyric and you are not blowing cold. In short: electric thermostats are equipped with a delay when power is tu..., Here are the detailed steps to reset the Honeywell temperature sensor. Turn the Gas Control knob to the "OFF" position. Wait for a minimum of 5 minutes to allow any residual gas to dissipate. Locate the pilot burner and ensure that it is not lit. If it is still lit, turn off the gas supply to the unit and wait for it to cool down before ..., 1-800-468-1502. 2. Introduction. The Honeywell T6 Pro Z-Wave Programmable Thermostat is a Z-Wave Plus certi- fied thermostat capable of controlling up to three heat and two cool stages of heat pump, (incl. dual fuel heat pump systems) and up to two heat and two cool stages of conventional system (3H/2C HP, 2H/2C Conv.), 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 …, Oct 18, 2023 · 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., How To Fix Blinking Snowflake On Honeywell Thermostat (What It Means And How To Troubleshoot It!). In this video tutorial I will show you how to fix blinking..., Blink cameras are a popular choice for home security systems due to their easy installation and wireless capabilities. If you have recently purchased a Blink camera, you might be w..., If you programmed your home to be at a cool 70 degrees but it feels more like 80, you can confirm with a simple home calibration. Double check the temperature by taping a thermometer to the wall next to your thermostat. Wait about 20 minutes, then check to see if the thermometer is reading the same temperature as the thermostat. ..., The 7800 SERIES Relay Module should start the INITIATE sequence. Let the sequence advance to PILOT IGN (status is displayed on the Keyboard Display Module, if used), PILOT LED turns on, ignition spark should occur and the pilot should light. If the pilot ignites, the FLAME LED is energized. Go to step 7., If your Honeywell thermostat won't stop flashing 'Cool On', follow these steps to troubleshoot: Reset the Thermostat: First, try resetting the thermostat. This can often resolve any minor technical glitches. Check the Wiring: Check the wiring between the thermostat and your HVAC system for any visible damage., Jan 17, 2024 · 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., We just moved into a new home which has heating/AC controlled by a Honeywell thermostat. If i change the temp below the temp the room is at, nothing is happening. The thermostat says cool on, but the temp never changes, and Im not sure any cool air is coming out of the vents. ... If 'cool on' is flashing it could be a delay and you need to …, Most Honeywell thermostats blink when in a time delay for cooling (or heating if it is a heat pump). This time delay feature protects the compressor from cranking too soon following a short off cycle or a power outage. The “cool on”, “heat on”, snowflake or flame icon will be blinking if this is the case. Honeywell Wireless Thermostat ...