From the locked home screen, press the center button. Users will need to enter the passcode. The default passcode when the Honeywell T4 Pro is partially or...The simplicity of the Honeywell Home PRO 2000 vertical thermostat from Resideo makes it an easy upgrade from basic up-down temperature controls without committing to a WiFi-connected thermostat. The PRO 2000 vertical thermostat has a large, backlit screen that is easy-to-read and features a real-time clock, with simple push-button controls.If you are using a Honeywell Pro series, follow these steps: When a menu pops up, press the next button until you see the 'Set' upper limit temperature on the right side of the screen. Press next to remove the lower limit, and your set lower limit should display. In this case, you should see 68.How to set Honeywell thermostat to cool. Answer: If you wish to make your house cooler, you must manually adjust the Honeywell thermostat’s temperature. To turn the fan on or off, press the “Fan” button. Then, to place the thermostat in Heat, Cool, or Off mode, hit the “System” button. Push the button one more to alter the setting.Solve The Honeywell Thermostat Flashing Problem. Before you start with some other method, you should wait for around 5 minutes. Sometimes "Cool On" icon on your Honeywell thermostat is displayed due to a timeout feature in A/C unit.That way your compressor is protected. The pressure difference can sometimes damage the compressor.Such damages are very expensive, so you should take good care ...2/25/22. To Set your schedule: Touch MENU on the thermostat display, select SCHEDULE. Each Day / Period will be displayed. Touch SELECT to edit each period. Touch the TIME displayed and use the +/ - icons to adjust the start time for the desired period (adjustable in 15-minute increments). Touch the TEMPERATURE displayed to adjust the desired ...PRO 1000 HORIZONTAL NON-PROGRAMMABLE THERMOSTAT Manual & Support. TH1210DH1001/U, TH1110DH1003/U, TH1100DH1004/U. Download Manual Download Installation Guide. Download Service Datasheet.Whenever Cool On is flashing, it just means that a command was sent to your unit outside, and it will kick in within 2-5 minutes. It is simply a safety measure not to damage the compressor. ... On my Honeywell Home Pro Series thermostat there 3 things going on. 1. Cool on is flashing in top left corner.PRO 4000 Series Programmable Digital Thermostat User Guide Read and save these instructions. Your new thermostat is pre-programmed. Just set the time and day. For help please visit yourhome.honeywell.com Press to set desired temperature. Note: Set SYSTEM switch to the system you want to control (Heat or Cool). Fan Switch is used to control your ...Different ways to secure the panel for Honeywell Thermostats. 3. Check the Batteries. One of the most common causes of issues with thermostats is the battery running out or being faulty. Honeywell thermostats are no exception. Faulty batteries could be causing your thermostat's screen to go blank and unresponsive.Honeywell Home TH6210U2001 - T6 Pro Programmable Thermostat, 2H/1C Heat Pump, 1H/1C Conventional- The T Series programmable thermostat streamlines everything from product selection and installation to customer service and support. With a standard footprint and simple interface, the T Series will enhance the entire thermostat experience for you and your customers alike<br> <br><b>Package ...Take control of your home comfort and save on energy costs with a range of Honeywell Home thermostats. From smart WiFi thermostats with room sensors and humidification control, to programmable and non-programmable thermostats, Honeywell Home products meet a variety of needs. ProSeries ... Braukmann HCC100 T6 smart thermostat DT4 room thermostat ...Honeywell Home Pro Series Tstat keeps flashing "cool on". Any idea why? New install 2 months ago. Doesn't seem to cool while this is happeneing.Honeywell Home TH2110DH1002 - PRO 2000 Horizontal Programmable Thermostat (1 Heat/1 Cool)- Overview: The PRO programmable family of thermostats provides basic and simple programming with specific models for conventional and heat pump systems. Features: Weekday/Weekend programming - 5-2 (Weekdays, Weekend) programming. ... 70 Series Programmable ...COLUMBIA THERMOSTAT FUND INSTITUTIONAL 3 CLASS- Performance charts including intraday, historical charts and prices and keydata. Indices Commodities Currencies StocksRemove your thermostat from the wall, and open the battery holder on the side of your thermostat. Remove the old batteries and clean the inside of the holder. Insert the fresh set of batteries and close the battery holder. Remount the Honeywell thermostat on the wall again. Ensure that it clicks into position.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.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 …Once Cool On stops blinking, the AC should kick in. Ask Your Own HVAC Question. HVAC Technician: ... I have a Honeywell Pro thermostat on my AC unit. I had it set on 76 all winter, but I kchanged all the settings to "Cool", and I set the Thermostat for 75 degrees.Different ways to secure the panel for Honeywell Thermostats. 3. Check the Batteries. One of the most common causes of issues with thermostats is the battery running out or being faulty. Honeywell thermostats are no exception. Faulty batteries could be causing your thermostat's screen to go blank and unresponsive.How to set Honeywell thermostat to cool. Answer: If you wish to make your house cooler, you must manually adjust the Honeywell thermostat’s temperature. To turn the fan on or off, press the “Fan” button. Then, to place the thermostat in Heat, Cool, or Off mode, hit the “System” button. Push the button one more to alter the setting.® TH5000 Series 7 69-1923EFS—01 ENGLISH Press the SYSTEM button to select: • Heat: Thermostat controls only the heating system. • Cool: 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.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 ("Waiting for Equipment" is not displayed ...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 ...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.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.The first thing to do to solve the problem is to test the heat. You need to turn on the thermostat to the heat position. Don't forget to set the temperature. Because you want to test the heat, setting the temperature as higher is better. For example, you can set the heat position to 80 degrees Fahrenheit.Honeywell Home Pro Series Thermostat 2. Honeywell Home T9 wifi smart thermostat (9510) 3. Honeywell Home T9 WiFi Smart Thermostat (9715) ... Honeywell thermostat cool on flashing 19. Honeywell Thermostat Customer Questions Manual 20. Description of the Honeywell thermostat manual 21. Honeywell thermostat features and manual detailsAfter a few minutes, the thermostat will connect to phone and wi-fi. Press next. It will give you a PIN "1234". Type the PIN on your device. Next, pick a location where you install the device. Enter Home OR select appropriate. Name your thermostat (you can use the brand name such as Honeywell T6 pro etc. or customize)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.Locate the system Slider Switch labeled Heat Off Cool. ... Beat the heat and save this season on a smart home thermostat. Search Button Find a Pro. Toggle navigation ... T6 Pro Smart Thermostat Support; T5/T5+ Smart Thermostat Support; Smart Home Partners REGISTER YOUR PRODUCT.1-Week Programmable Thermostat Support; 5-2 Day Programmable Thermostat Support; Single-stage Programmable Thermostat Support; Pro 2000 Horizontal Programmable Thermostat Support; T6 Pro Smart Thermostat Support; T5/T5+ Smart Thermostat SupportPart of the Honeywell Home T Series of thermostats from Resideo, the T4 Pro Programmable Thermostat helps you manage your home heating and cooling in a simple, easy to use device. Designed to streamline everything from installation to user experience, the T4 features push button control and seven-day scheduling, including an option to set …Summary of Contents for Pro T705. Page 1 Operation Manual Operation Manual... Page 2 T705 Pro1 Technologies 1111 S. Glenstone Ave., Suite 2-100 Springfield, MO 65804 Toll Free: 888-776-1427 Web: www.pro1iaq.com Hours of Operation: M-F 9AM - 6PM Eastern Table of Contents Page Caution: Table of Contents Thermostat Quick Reference Equipment damage ...1-48 of 129 results for "Honeywell Pro Series Thermostat" Results. Check each product page for other buying options. Honeywell. TH4110U2005/U T4 Pro Program Mable Thermostat, White. ... TH6220U2000/U T6 Pro Programmable Thermostat, 2 Heat / 1 Cool Heat Pump Or 2 Heat / 2 Cool Conventional, 2.27" x 6" x 5", White, Model:ITBD-3570150. 4.2 out of ...Your local energy company may be giving away free smart thermostats—here’s how to get one. There’s no such thing as a free lunch, but there is such thing as a free smart thermostat...Option 1: Soft Resetting Procedure. Sometimes, all it takes is a soft reset to get your Honeywell Thermostat Pro Series back on track. Think of it as a gentle nudge to remind your thermostat who’s in charge. With just a few simple button presses, you can clear minor issues and restore your thermostat to its optimal state.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.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.® TH5000 Series 7 69-1923EFS—01 ENGLISH Press the SYSTEM button to select: • Heat: Thermostat controls only the heating system. • Cool: 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.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 (tug gently on the wires) Check your jumper / R wire. Thermostats get power on the R and Rc terminals.If you have a wire in the R terminal, and no wire in the RC terminal, use the ...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.To reset your Honeywell t4 Pro thermostat, follow these steps: 1. Locate the "MENU" button on the thermostat. 2. Press and hold the "MENU" button until the screen changes. 3. Navigate to "RESET" using the arrow buttons. 4. Select "RESET" and confirm the reset by pressing "YES" when prompted.Smart Colour Touchscreen Thermostat. 9000 Series thermostat pdf manual download. Also for: Th9320wf3003. ... Thermostat Honeywell Home T4 Pro Series Manual. Programmable thermostat (61 pages) ... SYSTEM 2. Touch desired option: Heat: Thermostat controls only the Done heating system. Cool: Thermostat controls only the cooling system. Off ...All Honeywell thermostats that have batteries store the batteries in the control panel. Locate the batteries by removing the battery compartment tray or cover or by removing the unit's faceplate. Carefully extract the batteries, and replace them. Be sure to place the batteries in the correct orientation. The battery-powered control unit of ...I have a Honeywell home pro series, the cool on is flashing but the ac will not come on. TH411OU2005. ... We noticed that our A/C wasn't working and checked our Honeywell Pro Series model TH411OU2005 Thermostat. The Cool On was flashing and didn't stop flashing.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 …I have a Honeywell Lyric Pro Series thermostat that the screen went blank. When I took it off the wall, I discovered this model doesn't appear to have batteries. ... I have a honeywell pro th4000 series system. the cool on indicator is flashing. I have followed the instructions in the operating manual, however, it still keeps flashing.Matthias from John Cipollone, Inc. in Havertown, PA goes over the menu and settings for how to set up a Honeywell Pro Series Thermostat in your home. Enjoy t...It's brand new pro series. Contractor's Assistant: How long has this been going on with your Honeywell thermostat? What have you tried so far? We just moved in last night so, 12 hours. I hit the menu button and it took me thru heat cool, etc and when I hit the down button it won't go lower than 72 on temp. It's set on coolFollow in these steps. Step 1. Go to the thermostat configuration and enter the correct system type and change the reversing valve setting. Step 2. Remove the thermostat cover from the wall and don't forget to take a snap of the current wiring (you may need to restore your wiring to the current one.) Step 3.This thermostat is equipped with a clear and easy-to-read digital display, allowing you to easily program and adjust the temperature settings. It offers both heating and cooling modes, ensuring optimal comfort year-round. The Honeywell TH6210U2001/U thermostat is also compatible with a wide range of HVAC systems, making it suitable for most homes.System Mode Settings. 1) Get to the Home Screen This is an easy one, press the Home button and you're there. This will be your hub to navigate the rest of your options. 2) Select your System Mode Press the Mode button to cycle through the Heat, Cool, and Off modes until the one you want is displayed.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. We use cookies to give you the best possible experience on our website. ... We have a CM907 Honeywell Thermostat, have only been in this house for 6 months and the display is only partial. I ...Summary of Contents for Honeywell Home T3 Pro. Page 1 Heat On User Guide Menu Package Includes: Fan Auto • T3 Pro Thermostat • UWP™ Mounting System • Decorative Cover Plate - Small; Size 4.72" H X 5.9" W (120 mm H X 150 mm W) • Screws and Anchors TH3110U2008, •...Make sure function 38 is set to 1, then proceed to function 39. Use the up or down arrow to change function 39 function to 0 then press done. WiFi setup will then be displayed on the screen.*. Step 2 - Connect the thermostat to your home WiFi (via an internet browser on your mobile device) After connecting to the thermostat WiFi ...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.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.Resetting your T5 Thermostat is an easy process that can be done in a few simple steps. First, locate the reset button on the thermostat. This will usually be located near the face of the thermostat or somewhere along its sides. Once you have identified this button, press and hold it for 10 seconds until you hear a clicking sound.Sep 3, 2023 · An incorrect display can cause your Honeywell thermostat cool on to blink. To troubleshoot, verify the thermostat’s settings and programming: Ensure the thermostat is set to “cool” mode. Check if the cool on indicator is blinking or a solid light. Review your programmed temperature settings to ensure they’re accurate.Page 1: Operating Manual. Operating Manual Mode d'emploi Manual de Uso PRO 2000 Série Series Programmable Thermostats Thermostats programmables Termostatos programables... Page 3 To prevent possible compressor damage, do not use Cooling mode when the outdoor temperature is below 50 °F (10 °C).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.1. Check Thermostat Settings. 2. Check Your Thermostat’s Battery. 3. Set Your Thermostat to The Lowest Temperature. 4. Check If Both the Outdoor and Indoor Units Have a Power Supply. 5. Clogged Air Filters Could Cause Honeywell Thermostat Blinking Cool On. 6. Dirty Coils Can Cause Honeywell Thermostat Flashing “Cool On” 7.Programmable Thermostat. T6 Pro thermostat pdf manual download. Also for: Th6320u2008, Th6220u2000, Th6210u2001. ... Off/Cool/Auto/EM Heat (emergency heat) • Menu. Press to display options. ... Thermostat Honeywell Home T6 Pro Series Installation Instructions Manual (44 pages)Turn off the Thermostat: Locate the thermostat's power switch or circuit breaker in your electrical panel. Turn off the power to the thermostat. Wait for a Few Minutes: Leave it off for about five minutes to allow any residual power to dissipate.; Turn the Thermostat Back On: Restore power to the thermostat by flipping the switch or circuit breaker back on.1-Week Programmable Thermostat Support; 5-2 Day Programmable Thermostat Support; Single-stage Programmable Thermostat Support; Pro 2000 Horizontal Programmable Thermostat Support; T6 Pro Smart Thermostat Support; T5/T5+ Smart Thermostat SupportMake sure the temperature is set higher than the Inside temperature. Set system switch to Cool. Make sure the temperature is set lower than the Inside temperature. Wait 5 minutes for the system to respond. Check circuit breaker and reset if necessary. Make sure power switch at heating & cooling system is on.Last updated. 2/22/22. The temporary hold setting is when you change the temperature setting to a different temperature and it stays at that setting until the next schedule change. The permanent hold setting holds the temperature setting you have chosen for an indefinite time. This overrides your scheduled settings.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 …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 ...In this video, I show you and tell you how to change between heat and cool on your Honeywell Programmable Thermostat. it is actually a very simple process, a...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...If your Honeywell thermostat is flashing “Cool On,” it means that the unit is turned on, but cooling is not currently required. This can happen if the room temperature is already at or below the set point. The fan will still run, but the compressor will not come on until the room temperature rises above the set point.1-Week Programmable Thermostat Support; 5-2 Day Programmable Thermostat Support; Single-stage Programmable Thermostat Support; Pro 2000 Horizontal Programmable Thermostat Support; T6 Pro Smart Thermostat Support; T5/T5+ Smart Thermostat Support1-Week Programmable Thermostat Support; 5-2 Day Programmable Thermostat Support; Single-stage Programmable Thermostat Support; Pro 2000 Horizontal Programmable Thermostat Support; T6 Pro Smart Thermostat Support; T5/T5+ Smart Thermostat SupportA Honeywell thermostat will go blank, in case the device is off (there is no power, the circuit breaker had tripped, the batteries are dead), there are issues with the wiring, or the safety switch had tripped. Low display brightness can also be the root cause of the problem. Why Does Honeywell Thermostat Go Blank?. The thermostat might simply be off; There is no power to the thermostatOption 1: Soft Resetting Procedure. Sometimes, all it takes is a soft reset to get your Honeywell Thermostat Pro Series back on track. Think of it as a gentle nudge to remind your thermostat who's in charge. With just a few simple button presses, you can clear minor issues and restore your thermostat to its optimal state.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.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.Return mode starts flashing whenever the Honeywell thermostat is preparing in advance for the “Return” or “Home” schedule periods. ... Adjust the heat and cool temperatures for the Wake period using the up and down arrows and touch Done to save. ... PRO 4000 and RTH 2300 Series. Programmable thermostats. Schedule Mode: …Page 10: Thermostat Mounting. Thermostat mounting 1.Push excess wire back into the wall opening. 2. Close the UWP door. It should remain closed without bulging. 3. Align the UWP with the thermostat, and push gently until the thermostat snaps in place. 4. Turn the power on at the breaker box or switch.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, without damage to the ...If your thermostat does not have this auto-updating capability or the date is not enabled, you will need to manually adjust the time and date on your thermostat. Please follow the steps in the links bellow, according to the thermostat family model that you own. 9000 family and VisionPro.Need help with your Honeywell T4 Pro Thermostat? Sierra Air Conditioning & Heating has a quick, yet comprehensive tutorial showing you how to set up your the...Support. Support: WIFI SMART COLOR THERMOSTAT. WIFI SMART COLOR THERMOSTAT Manual & Support. RTH9585WF1006/W, RTH9585WF1004/U. …Will resetting my Honeywell thermostat fix a blank screen? • Is your Honeywell thermostat showing a blank screen? Don't worry, we've got you covered! In this...Honeywell Pro Series Thermostat troubleshooting can be done by following simple steps to identify and fix common issues. Enjoy pinpoint control of temperature and ventilation settings with this smart thermostat. ... The Carrier Air V green light flashing 5 times indicates that the AC unit is in need of service. This could be due to electrical ...Page 1: Thermostat Controls. Digital Thermostat FocusPRO ® 5000 Product Information Series Thermostat controls Display screen Low battery Auxiliary heat (Only Temperature warning for heat pumps with setting auxiliary heat) Current inside System temperature Heat Replace Status Inside Battery holder Setting Battery Cool On: Temperature buttons ...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 …Once Cool On stops blinking, the AC should kick in. Ask Your Own HVAC Question. HVAC Technician: ... I have a Honeywell Pro thermostat on my AC unit. I had it set on 76 all winter, but I kchanged all the settings to "Cool", and I set the Thermostat for 75 degrees.1-Week Programmable Thermostat Support; 5-2 Day Programmable Thermostat S, What I see: This stock responds well to economic recovery....AAPL Lucky break. I t, A blinking "Cool On" message can indicate various causes, such as dy, Due to drained batteries, the heating or cooling feature of therm, Honeywell® T6 Pro Programmable Thermostat ^ White ^ 4.06W x 4.06"H ^ Two Stage Heat/One Stage Cool , 2/25/22. To Set your schedule: Touch MENU on the thermostat display, select SCHEDULE. Each Day / Period will be displa, 2/25/22. To Set your schedule: Touch MENU on the thermostat display, select SCHEDULE. Each Day / Period will be d, Cool on is flashing on my Honeywell thermostat - A, The battery of the thermostat is low. When the cool lig, The compressor protection will not turn off on my honeywell , Temperature settings do not change. Make sure heating and cooling temp, Confirm the message "Cool On" is solid (n, POPULAR VIDEOS. How to Install A Honeywell Home T3, T4, T5, T, View and Download Honeywell Home T4 Pro Series manual online. Program, Your thermostat is blinking heat on signal because there might be a pr, System Mode Settings. 1) Get to the Home Screen This is an easy one, This allows the thermostat to "learn" how long the heat, PRO 1000 Series Non-Programmable Thermostat 69-2798EFS-.