Honeywell proseries cool on flashing

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 proseries cool on flashing. "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

If you have forgotten your 4-digit passcode, there are two things that you can try out to unlock your Honeywell thermostat: Insert 1234 as the passcode. If that didn't work, then look inside the thermostat and take note of the 4-digit date code; after that, add 1234 to the number. For example, if the date code is 0919, then insert 2153 as the ...

My honeywell t4 pro series has a flashing "cool on" and I have used all of the suggestions and still the - Answered by a verified Home Improvement Expert ... My honeywell t4 pro series has a flashing "cool on" and I have used all of the suggestions and still the compressor does not turn on. Contractor's Assistant: How old is your Honeywell unit ...Aug 11, 2022 · Usually, a Honeywell thermostat will enter Recovery mode when it needs to adjust from a mode that is energy-saving. When this happens, it will turn on your HVAC system before the time you scheduled a certain temperature, so it will get the chance to adjust gradually. For instance, if you set up your thermostat to offer you a temperature of 70 ... • Cool: 50 °F to 99 °F (10.0 °C to 37.0 °C) "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). Electrical Ratings Terminal Voltage (50 Hz/60 Hz) Running Current W Heating 20 Vac - 30 Vac 0.02 A - 1.0 ACool: Thermostat controls only the cooling system. Off: Heating and cooling systems are off. Auto: Thermostat automatically selects heating or cooling depending on the indoor temperature. Em Heat (only for heat pumps with auxiliary heat): Thermostat controls Emergency and Auxiliary Heat.Wait 5-10 minutes. Your thermostat could be facing a slight delay in restarting and activating …

A “cool on” message can also appear if the thermostat logs out or times out on its own. Wait 5 minutes, restart your thermostat, and identify and replace fuse or wire damage to make it return to normal. Thermostats can also flash a “cool on” message if it is working hard to produce cool air. This can happen even if there isn’t an ...In this video I instructions for the correct and easy way to replace the two AA(double A) batteries in a Honeywell pro series T4 thermostat. When the batteri... 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. 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.Honeywell thermostats are known for their reliability and user-friendly design. However, like any electronic device, they can sometimes encounter issues that require troubleshootin...Apr 4, 2023 · 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 ... Step 1: Check Wi-Fi Signal Strength. Weak Wi-Fi signals are the primary cause of connectivity issues in smart thermostats, so by improving the signal can make a world of difference. To see if this is the case, check the signal strength using the Wi-Fi signal bars indicator on your smartphone or smart device. If your smartphone shows low Wi-Fi ...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...

If the system is set on cool, make sure the temperature is set below the temperature in the room for the air conditioner to turn on. If all of the above factors check out and the thermostat still is not functioning, look for a flashing icon on the display. If you see one, that means the thermostat is currently in delay mode and should work ...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.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.’.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.Ac not working, and on the thermostat in the upper right corner is is blinking cool on. - Answered by a verified HVAC Technician. We use cookies to give you the best possible experience on our website. ... I have a Honeywell home pro series, the cool on is flashing but the ac will not come on. ...

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Honeywell ProSeries display reads "Cool On" "Fan On" "Permanent Hold" and temp reads 25 degrees. ProSeries - not sure - Answered by a verified HVAC Technician ... "Cool On" was flashing momentarily and now stopped flashing. 45 minutes have passed since it stopped flashing but still no cool air at all.I switched from heat to AC, last month. It ...Make sure the heating and cooling set points are within the operating range. Heat: 40 ºF to 90 ºF (4.5 ºC to 32.0 ºC) Cool: 50 ºF to 99 ºF (10.0 ºC to 37.0 ºC) If Cool On or Heat On is flashing: The compressor protection feature is engaged. Wait a few minutes for the system to safely restart to avoid damaging the compressor.Make sure heating and cooling temperatures are set to acceptable ranges: Heat: 40° to 90°F (4.5° to 32°C). Cool: 50° to 99°F (10° to 37°C). "Cool On" or "Heat On" is flashing. Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor. 5-year limited warrantyHoneywell pro series cool on blinking. If your Honeywell Pro series cool is blinking, it may be an indication that the system is not working properly. Here are some things to check: Make sure the power is on. Check the circuit breaker or fuse box to ensure that the power to the unit is not interrupted. Check the batteries.

Honeywell controllers are a popular choice for many businesses in Shreveport, LA. They are reliable and easy to use, making them an ideal choice for controlling temperature and hum...Recommended Fix. 1. Honeywell AC Won't Work. The wrong setting, dirty condenser coils, or a non-running fan. Set the thermostat on COOL, lower the temperature below room temperature, and set the fan on ON/Auto mode. Clean dirty coils and ensure the fan is running. 2. Honeywell Air Conditioner Not Blowing Cold Air.If you have forgotten your 4-digit passcode, there are two things that you can try out to unlock your Honeywell thermostat: Insert 1234 as the passcode. If that didn't work, then look inside the thermostat and take note of the 4-digit date code; after that, add 1234 to the number. For example, if the date code is 0919, then insert 2153 as the ... In most cases, the blinking “Cool On” or “Heat On” indicator simply means that the thermostat is in a delay. This delay can be activated by cycling power, such as during a power outage, turning the disconnect power off and on, toggling the power switch on the furnace or air handler, or changing the thermostat batteries. The solution is ... Unsure if Honeywell Home thermostats from Resideo are compatible with your home? Use our tool to determine which thermostats work with your home's existing wiring. Check Compatibility. APP STATUS. Your issue may be related to a system outage on one of our applications. See current status of Resideo's mobile applications belowThe filter can improve the system’s performance or cause extensive damage when clogged with a significant amount of dirt. If the Cool On indicator flashes on your Honeywell thermostat, turn the air conditioner off and inspect the filter. A clogged air filter restricts the airflow into and out of the system, causing a malfunction.On my Honeywell Home Pro Series thermostat there 3 things going on. 1. Cool on is flashing in top left corner. 2. A triangle is light in middle of top of display. ... When Cool on is flashing, it means the command was sent to start the AC unit, it is just the delay for it to kick in. Once it stops flashing, the unit outside is generally on. ...You can do this by pressing the panel and holding it until you hear a clicking sound. The Honeywell thermostat's panel is the area around the device's screen. If you don't hear any click when you press your Honeywell thermostat's panel, it may not be the reason for the blank screen issue. 8. Get a New Thermostat.Sep 9, 2023 · On my Honeywell Home Pro Series thermostat there 3 things going on. 1. Cool on is flashing in top left corner. 2. A triangle is light in middle of top of display. 3. Top right corner by Wi-fi there is … read more Honeywell TH4110D1007 Temperature settings do not change. Make sure heating and cooling temperatures are set to acceptable ranges: Heat: 40° to 90°F (4.5° to 32°C). Cool: 50° to 99°F (10° to 37°C). "Cool On" or. "Heat On" is flashing. Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely ...the compressor protection feature won't go off. the "heat on" light is flashing and wont go off. the manual says wait 5 minutes but still wont go off and heat will not go ... read more. RobHVAC. 2,020 satisfied customers. Honeywell thermostat says cool on, it was blinking but now. Hello, Honeywell thermostat says cool on, it was blinking but ...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 ...

Turn ON the thermostat. Press the PROGRAM button thrice. The reset button is located inside a small hole on the front panel of the thermostat and to the right of the buttons. Use a sharp object (toothpick, paperclip, or pin), put it in the hole, and press the button for about 5 seconds. Now, your thermostat has been reset.

View and Download Honeywell Home T4 Pro Series manual online. Programmable Thermostat. T4 Pro Series thermostat pdf manual download. Also for: Th4110u2005, Th4210u2002. ... Cool, Fan, Em. Page 18: Troubleshooting Troubleshooting If you have difficulty with your thermostat, please try the following suggestions. Most problems can be corrected ...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...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...About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Fix 1: Check if the batteries were installed correctly. Fix 2: Change the batteries! Fix 3: Reset honeywell thermostat after replacing batteries. Other fixes. Inspect the thermostat- something may have gone wrong! Shut the access door (on the furnace) correctly. Reset the circuit breaker/replace the fuse. Replace the Thermostat.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.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.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 …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 ...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.

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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 ...In this video I explain what Temporary and Permanent Hold are on a Honeywell Pro Series Thermostat. I show you step by step how to select Temporary Hold and ...Why is my system heating when it's set to cooling? 1. Verify the thermostat is wired correctly. 2. Make sure the thermostat is configured correctly for the heating/cooling system type. 3. Verify the wiring is connected correctly and securely to the thermostat. If the above information has been verified and the issue is still present, contact a ...I have a Honeywell home pro series, the cool on is flashing but the ac will not come on. TH411OU2005. For the last - Answered by a verified HVAC TechnicianThis Honeywell Home PRO 3000 Non-Programmable Thermostat from Resideo offers basic operation such as a slide switch for selecting heat, cool, or operate the fan. The backlit digital display makes temperature and settings easier to read in various lighting conditions. SELECT A MODEL: PRO 3000 1 Heat/1 Cool Non-Programmable Digital Thermostat.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 ...It could be that your thermostat is not currently receiving power due to the batteries drying up or a problem with the power source. In either case, if your thermostat uses AA batteries, try replacing the batteries. If it is directly connected to a power source, then check if the power source is working or not. Check Connection Points.Flashing cool on. Contractor's Assistant: Do you know the model of your Honeywell thermostat? How old is it? 3 years old, honeywell home pro series. Contractor's Assistant: How long has this been going on with your Honeywell thermostat? What have you tried so far? Turned off circuit breakers for ac and furnace, turned back … ….

If your new Honeywell thermostat is blowing hot air on the cool setting, there are a few possible solutions. First, check to make sure that the thermostat is set to cool mode and not heat mode. If it is set to heat mode, the thermostat will blow hot air. Second, check the settings to make sure that the temperature is set correctly.My honeywell t4 pro series has a flashing "cool on" and I have used all of the suggestions and still the - Answered by a verified Home Improvement Expert ... My honeywell t4 pro series has a flashing "cool on" and I have used all of the suggestions and still the compressor does not turn on. Contractor's Assistant: How old is your …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 …2) You have a conventional heating system. Another reason a honeywell thermostat will not display the cool option is that you don't have a cooling system such as an air conditioner or a heat pump. Be sure that you have an air conditioner. You can try setting your thermostat to defrost and check if the condenser unit will engage.FIND THE USER GUIDE FOR YOUR THERMOSTAT. First, let's identify your device. Select the product you’re having trouble with from the options below. komfort. komfort. valve-sizing. rondostat-videos. brochure-l5-emea.Turning off the Honeywell thermostat's permanent hold setting is easy. It is usually the same for turning off a temporary hold. Depending on your model, you can go ahead and press Run, Cancel, Run Schedule, Use Schedule, Remove Hold, or Cancel Hold. For other models such as the T4 Pro, press the +/- or up/down buttons first then press Cancel or ...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 displays "Auto".Cool on indicator flashing on Honeywell thermostat I have a honeywell pro th4000 series system. The fan will not blow air unless there is a call from the system. If "wait" is in the screen or "cool on" is flashing - wait 5 minutes for the system to safely respond. T6 PRO PROGRAMMABLE THERMOSTAT Product Page. Just like with the month, you will be automatically asked to select the day ... Honeywell proseries cool on flashing, Ok, If the condenser is running outside then it is getting the call from the thermostat to run. So you have likely got a problem with your system somewhere. Either the refrigerant is low or you may have an airflow problem, or a couple different other issues., Contact Service Experts Heating, Air Conditioning & Plumbing at 866-397-3787 for help. 181/182—Get a new air filter. Clear the thermostat by tapping "dismiss" after putting in a clean filter. 183—Rinse humidifier tank and install a new water filter. Clear the thermostat by hitting "dismiss" after finishing these steps., The only thing on display should be Room temp, Set temp and if system is in cool off or heat mode. ... if i leave it on the heat setting it keeps on flashing. I went down to the usit down stairs and it clicks every time the thermostat flashes ... I am locked out of my T6 Honeywell pro series thermostat I have tried 1234, I have tried adding ..., 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., If your honeywell thermostat is not showing a cool option , that is because of an internal sensor. To fix the problem you’ll need to reset your thermostat. If the …, 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 …, Remove the old batteries, noting where the positive and negative ends are placed. Dispose of them properly and then insert your new batteries. Slide the battery compartment back into place, bottom first. A little push, and it should snap back into place. With fresh batteries, your thermostat should automatically turn back on in a few minutes., If "WiFi Setup" isn't displayed on the screen, your thermostat may have been previously connected to an-other WiFi network. To "forget" the previous network. Press and hold the "Fan" button and the "Up" arrow simultaneously until the screen changes. Press "Next" until "39" is displayed on the left side of the screen., 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., 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., Why is my system heating when it's set to cooling? 1. Verify the thermostat is wired correctly. 2. Make sure the thermostat is configured correctly for the heating/cooling system type. 3. Verify the wiring is connected correctly and securely to the thermostat. If the above information has been verified and the issue is still present, contact a ..., Make sure power switch at heating & cooling system is on. Make sure furnace door is closed securely. Wait 5 minutes for the system to respond. Make sure heating and cooling temperatures are set to acceptable ranges: Heat: 40° to 90°F (4.5° to 32°C). Cool: 50° to 99°F (10° to 37°C). Compressor protection feature is engaged., 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 ..., On my Honeywell Home Pro Series thermostat there 3 things going on. 1. Cool on is flashing in top left corner. 2. A triangle is light in middle of top of display. ... When Cool on is flashing, it means the command was sent to start the AC unit, it is just the delay for it to kick in. Once it stops flashing, the unit outside is generally on. ..., Unsure if Honeywell Home thermostats from Resideo are compatible with your home? Use our tool to determine which thermostats work with your home's existing wiring. Check Compatibility. APP STATUS. Your issue may be related to a system outage on one of our applications. See current status of Resideo's mobile applications below, First of all, make sure that the thermostat is set to a cool temperature and is in cool mode. If it's in auto mode, change it to cool mode and set a lower temperature. Now, wait a while to see if your home feels cool (you can also check the temperature of the air coming out of the vents). Check if the thermostat has a flashing icon., 1 Common Issues With Honeywell Pro Series Thermostats. 1.1 Thermostat Not Working. 1.2 Blank Screen Or Unresponsive. 1.3 Thermostat Not Heating Up. 2 Troubleshooting Solutions. 2.1 Check Power Source And Batteries. 2.2 Inspect Circuit Breaker. 2.3 Ensure Indoor Unit Doors Are Closed. 2.4 Restart The Thermostat., Why is my Honeywell Thermostat Blinking Cool On? Five-Minute Compressor Delay. Low Thermostat Batteries. Power Outage. AC Unit Malfunction. …, Make sure heating and cooling temperatures are set to acceptable ranges: Heat: 40° to 90°F (4.5° to 32°C). Cool: 50° to 99°F (10° to 37°C). "Cool On" or "Heat On" is flashing. Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor (see page 4)., 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 ..., 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 ..., Package Includes: T4 Pro Thermostat. UWPTM Mounting System. Honeywell Standard Installation Adapter (J-box adapter) Honeywell Decorative Cover Plate - Small; size 4-49/64 in x 4-49/64 in x 11/32 in (121 mm x 121 mm x 9 mm) Screws and anchors. 2 AA Batteries. Installation Instructions and User Guide., Hello I have a Honeywell T4 Pro that was flashing "Cool On" on the right side of the screen. Nothing seems to help I did replace the batteries and it stopped blinking and now it is solid "Cool On" When I run the test it does kick the AC on. So the AC itself is fine. It seems like it is something with the thermostat. It has fresh batteries., 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., 8 Set fan operation switch. Move the switch to the proper setting: Gas or Oil: For gas or oil heating systems, leave the fan operation switch in this factory-set position (for systems that control the fan in a call for heat). Electric or Heat Pump: Change the switch to this setting for heat pump or electric heat systems., When it comes to operating and maintaining your Honeywell products, having a thorough understanding of the user manual is crucial. Honeywell user manuals provide detailed instructi..., The filter can improve the system's performance or cause extensive damage when clogged with a significant amount of dirt. If the Cool On indicator flashes on your Honeywell thermostat, turn the air conditioner off and inspect the filter. A clogged air filter restricts the airflow into and out of the system, causing a malfunction., 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. , Gently pull the thermostat away from the wallplate, remove the battery and replace it with a new one. To tell if your Lyric has AC power, gently pull the thermostat away from the wallplate and look at your wiring. If you have a wire in the C terminal, you should have AC power and your Lyric's screen should not go blank., A "cool on" message can also appear if the thermostat logs out or times out on its own. Wait 5 minutes, restart your thermostat, and identify and replace fuse or wire damage to make it return to normal. Thermostats can also flash a "cool on" message if it is working hard to produce cool air. This can happen even if there isn't an ..., Hello I have a Honeywell T4 Pro that was flashing "Cool On" on the right side of the screen. Nothing seems to help I did replace the batteries and it stopped blinking and now it is solid "Cool On" When I run the test it does kick the AC on. So the AC itself is fine. It seems like it is something with the thermostat. It has fresh batteries., 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., Then, reset your thermostat by either gently pulling it off the wall near the base of the thermostat, allowing for one minute to pass, then placing it back on the wall, or by turning the service switch on your furnace/AC system off for 30 seconds. The device should recover within about 10 minutes.