Pro thermostat cool on blinking

Thermostat Quick Reference Thermostat Quick Reference Displays the user selected setpoint temperature. System Operation Indicators: The COOL ON, HEAT ON or icon will display when the COOL, HEAT, or (fan) is on. NOTE: The compressor delay feature is active if these icons are flashing. The compressor will not turn on until the 5

Pro thermostat cool on blinking. Low Batteries. A blinking “Cool On” message can appear due to dying batteries, a power surge, or a power outage. Thermostat batteries last for an average of 10 months, so it is easy to tell when dead batteries are the culprit. Sometimes, a Honeywell thermostat can bounce back after a power outage without requiring a reset.

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.

This exchange-traded fund is positioned to give investors exposure to companies taking meaningful steps toward reducing greenhouse gas emissions -- will it work and will it make yo...Getting to know your thermostat 1 LCD 2 3 Fan Switch 4 System Switch 5 Easy Change Battery Door 6 Setpoint Buttons 7 User Buttons Displays the user selectable setpoint temperature. System operation indicators: The COOL, HEAT or FAN icon will display when the COOL, HEAT or FAN is on. NOTE: The compressor delay feature is active if these icons ...If you are in the correct mode, but you cannot set the heat from 40°F to 90°F (4.5°C to 32°C), or set the cool from 50°F to 99°F (10°C to 37°C), you may have range-stops restricting your setting. Check with the installer to see if they set range-stops. "Cool On" or "Heat On" is flashing. Compressor protection feature is engaged.7 Steps to Troubleshoot a Honeywell Thermostat Flashing “Cool On” Message. 1. Check Thermostat Settings; 2. Check Your Thermostat’s Battery; 3. Set …The procedure for restarting your LuxPRO Thermostat is as follows: If you have an electricity-powered thermostat, switch through the modes until you see “OFF”. You may turn the system OFF and detach the thermostat from the wall. If your thermostat runs on batteries, you must take off the cover, remove the batteries, and wait up to 15 ...Dec 22, 2023 · Here are some steps you can take to troubleshoot and fix the blinking thermostat issue: Check the Air Filter: A dirty or clogged air filter can restrict airflow, causing the system to overheat and trigger short cycling. If the filter appears dirty, replace it with a new one. Inspect the Thermostat Wiring: Loose or damaged thermostat wiring can ... Jan 27, 2023 · Here is how to reset a Luxpro thermostat: Locate the reset button on your device (it is small and has “H.W. Reset” or “R. Reset” written on it). Press and hold the button for a few seconds (about 5 seconds) The screen will blink, then the thermostat will automatically reset itself.

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. The blinking "Cool On" means the cool cycle is in delay (5 minute by default). If it's continually blinking then either the thermostat is bad, or there's a short in the low voltage wiring that's causing it to reset everytime it tries to come back on (basically resetting itself over and over). 2. Reply. Effective-Brush9301. 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 …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.Jan 27, 2023 · Here is how to reset a Luxpro thermostat: Locate the reset button on your device (it is small and has “H.W. Reset” or “R. Reset” written on it). Press and hold the button for a few seconds (about 5 seconds) The screen will blink, then the thermostat will automatically reset itself. Aug 3, 2020 · 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. 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.

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.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 …2 Power Cycle Your Thermostat. 2.1 Remove The Thermostat From The Subbase. 2.2 Take Out The Batteries. 2.3 Reinsert The Batteries And Reattach The Thermostat To The Subbase. 3 Reset The Thermostat. 3.1 Switch The Thermostat To The Off Position. 3.2 Locate The Breaker That Powers Your HVAC System And Turn It Off.Summary of Contents for Pro T721. Page 1 Operation Manual Operation Manual... Page 2 T721 Pro1 Technologies P.O. Box 3377 Springfield, MO 65808-3377 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 Operation Thermostat Quick …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...

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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 ...Aug 4, 2022 · So, when your Honeywell thermostat is in the blinking stage, it shows Cool-On for more than 5 minutes – But there is a feeling that the surrounding area is not cooling down, there is no cool air coming through the system either; you might need to fix the problem. With the advancement of technology, home security has become easier and more accessible than ever before. One popular option for homeowners is the use of smart home security system...In today’s digital age, home security has become a top priority for homeowners. With the advancements in technology, it is now easier than ever to keep an eye on your property and ...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 …Symptom: Low battery indicator is blinking in thermostat display. Potential Solution: Replace batteries immediately to maintain proper system operation. See Section 7. Symptom: OFF is shown in thermostat display and heating or cooling system will not start. Potential Solution: This indicates that the system is turned off at the thermostat. …

The Thermostat quick reference say the +1 will appear in the display when the 2nd stage of heat or cool is on. +2 will appear for the third stage of heat. Wvfan79 : Thats rightMake sure power switch for heating & cooling system is on. Make sure furnace door is closed securely. Wait 5 minutes for the system to respond. Temperature settings do not change. If you are in the correct mode, but you cannot set the heat from 32 °F to 90 °F (0 °C to 32 °C), or set the cool from 50 °F to 99 °F (10 °C to 37 °C), you may ...2 Power Cycle Your Thermostat. 2.1 Remove The Thermostat From The Subbase. 2.2 Take Out The Batteries. 2.3 Reinsert The Batteries And Reattach The Thermostat To The Subbase. 3 Reset The Thermostat. 3.1 Switch The Thermostat To The Off Position. 3.2 Locate The Breaker That Powers Your HVAC System And Turn It [email protected]. 1-888-PRO1-IAQ. (1-888-776-1427) Toll Number (outside the US): 417-720-1435. Contact Us.Temperature settings do not change. Make sure heating and cooling temperatures are set to acceptable ranges: • Heat: 40 °F to 90 °F (4.5 °C to 32.0 °C) • 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.Apr 25, 2023 · Honeywell Thermostats. If you have a blinking or flashing snowflake on your Honeywell thermostat, or the word heat/cool is blinking, it means your thermostat is in delay mode. Your system should cycle on in five minutes but check the possible causes above for delay mode. Check for possible causes if your thermostat is in delay mode. 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.Nov 8, 2022 · 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. If the thermostat is set for cool, verify that the furnace door is securely closed and that the furnace’s power switch is set to On. Make sure the furnace circuit breaker switches are on. Honeywell Home T4 Pro User Manual View and Read online. Thermostat controls. System operation settings. Program Schedule. Est. reading time 10 minutes. T4 Pro Thermostat manuals and instructions online. Download Honeywell Home T4 Pro PDF manual.Dec 2, 2023 · Blown Fuse. Low Refrigerant. How to Fix Honeywell Thermostat Cool On Blinking Light. 1. Lower Thermostat Temperature. 2. Check Thermostat Batteries. 3. Inspect Electrical Wiring. 4. Reset AC Circuit Breaker. 5. Replace AC Filter. 6. Clean AC Condenser Coils. 7. Verify Thermostat Settings. 8. Managing your thermostat is an important part of making your home energy efficient, and Ecobee's SmartThermostat with voice control makes that job easy. Expert Advice On Improving ...

A ‘cool on’ message will be flashing on your Honeywell thermostat, in case the system is in delay mode or if the batteries need to be changed; simply wait for 5 minutes or change the batteries and the message will disappear. If the message stays, try resetting the device.

The little green light on the back of your HP desktop indicates the health and well-being of your power supply unit. Normally this light glows a steady green, but damage to the PSU... The COOL ON, HEAT ON or icon will display when the COOL, HEAT, or (fan) is on. Note: The Compressor delay feature is active if these are flashing. 1 2 3 7 Low Battery Indicator: Replace batteries when this indicator is shown. Button Options Program Time Periods: This thermostat has 4 programmable time periods per day. 2 2 1 8 3 LOW 1-800-468-1502. Introduction. The Honeywell T6 Pro Z-Wave Programmable Thermostat is a Z-Wave Plus certified thermo-stat 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.)Inspect the Wiring. A Lux thermostat wiring issue can keep it from working properly. Shut off the power to the thermostat at the breaker and pull the cover off your Lux thermostat to reveal the wiring. Make sure everything is connected to the terminals properly. If the Lux thermostat is newly installed, there could be mistakes in how you …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 …Why Is My Honeywell T4 Thermostat Cool On Blinking? 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 ...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.

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Thermostats normally blink the selected mode word (Heat, Cool) in a programmed wait time. This is built into the program and it is normally changeable. Most …Low Batteries. A blinking “Cool On” message can appear due to dying batteries, a power surge, or a power outage. Thermostat batteries last for an average of 10 months, so it is easy to tell when dead batteries are the culprit. Sometimes, a Honeywell thermostat can bounce back after a power outage without requiring a reset.Troubleshooting guide: Why is your Honeywell thermostat flashing 'Cool on'? Get answers to fix HVAC issues fast...Blinking “cool on” and no cold air being. 2 year old house, Pro series. Just today. 80 in the house. Replaced - Answered by a verified HVAC TechnicianIn today’s fast-paced world, home security has become a top priority for many homeowners. With advancements in technology, there are now numerous options available to enhance the s...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.When your Lux thermostat stops working, it can be due to user error, dust buildup, minor system glitches, low batteries, or power and wiring issues. Depending on what is going wrong, there are many simple fixes, including routine cleaning, restarting/resetting the thermostat, switching circuit breakers off and on, replacing the …Watch this video to find out about the ComfortLink II thermostat from Trane, which has a 7” color touch screen to display temperature, check weather, and more. Expert Advice On Imp...Honeywell has made a business out of helping homes be more comfortable. Today, it is one of the leaders in providing solutions for connected homes, including delivering a variety o...Watch this video to find out about the ComfortLink II thermostat from Trane, which has a 7” color touch screen to display temperature, check weather, and more. Expert Advice On Imp...Getting to know your thermostat 1 LCD 2 3 Fan Switch 4 System Switch 5 Easy Change Battery Door 6 Setpoint Buttons 7 User Buttons Displays the user selectable setpoint temperature. System operation indicators: The COOL, HEAT or FAN icon will display when the COOL, HEAT or FAN is on. NOTE: The compressor delay feature is active if these icons ... ….

Set unit to heat mode. Adjust set temperature to at least 5 degrees below room temperature. Then adjust set temperature upward one degree at a time. Listen carefully for a soft click from the thermostat. This click should be heard near room temperature. Adjust set temperature down one degree at a time.The flashing “cool on” light on your Honeywell thermostat means that there is a problem with your HVAC system that is preventing proper cooling. The blinking indicator could be something as simple as low batteries or a tripped circuit breaker .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...Verify Power Supply. To troubleshoot a Honeywell AC thermostat with a blinking cool on LED, start by verifying the power supply. Check the thermostat power source to ensure proper voltage supply. Inspect the power connections and make sure they are secure. If the wires are loose or damaged, tighten or replace them accordingly.Why Is My Honeywell T4 Thermostat Cool On Blinking? 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 …[email protected]. 1-888-PRO1-IAQ. (1-888-776-1427) Toll Number (outside the US): 417-720-1435. Contact Us.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 SettingIf the high limit switch is open due to overheating, it can cause the your Honeywell thermostat to flash “Heat On”. Troubleshooting will typically involve checking the high limit switch to ensure it is not tripped or stuck in the open position. If it is, allow the furnace to cool down and then reset the switch.The procedure for restarting your LuxPRO Thermostat is as follows: If you have an electricity-powered thermostat, switch through the modes until you see “OFF”. You may turn the system OFF and detach the thermostat from the wall. If your thermostat runs on batteries, you must take off the cover, remove the batteries, and wait up to 15 ... Pro thermostat cool on blinking, Oct 18, 2023 · Incorrect thermostat settings can lead to the cool on blinking issue. Double-check that the thermostat is set to cool mode and that the temperature settings are appropriate for your comfort. 2. Faulty wiring connection. A loose or faulty wiring connection between the thermostat and the HVAC system can cause the cool on blinking issue. , The Thermostat Batteries are Low and Need to be Replaced. If your thermostat screen is blinking, it may simply be a sign that the batteries are low and need to be replaced. When your thermostat’s batteries eventually die, you will be presented with a blank display screen — and unable to cool or heat your home., At a glance: Honeywell Thermostat cool on blinking due to Lower thermostat setting, thermostat in setup mode, thermostat batteries,AC filter need changing or dirty AC coils. Related post>>>>Honeywell Thermostat connection failure., Summary of Contents for Pro T721. Page 1 Operation Manual Operation Manual... Page 2 T721 Pro1 Technologies P.O. Box 3377 Springfield, MO 65808-3377 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 Operation Thermostat Quick …, 1. Mount the thermostat on an inside wall, about 5 ft. (1.5m) above the floor. 2. Do not locate the thermostat where air circulation is poor such as in a corner, alcove, or behind a door that is normally left open. 3. Do not locate the thermostat where unusual heating or cooling conditions may be present, such as: direct sunlight, above a lamp,, Thermostat Quick Reference 4 5 Thermostat Quick Reference Displays the user selected setpoint temperature. System Operation Indicators: The COOL ON, HEAT ON or icon will display when the COOL, HEAT, or (fan) is on. NOTE: The compressor delay feature is active if these icons are flashing. The compressor will not turn on until the 5, Honeywell Thermostats. If you have a blinking or flashing snowflake on your Honeywell thermostat, or the word heat/cool is blinking, it means your thermostat is in delay mode. Your system should cycle on in five minutes but check the possible causes above for delay mode. Check for possible causes if your thermostat is in delay mode., Step 2 – Check to See if the Thermostat or the Clock are Set. Your thermostat could go into setup mode if you had a recent power outage or no power for a while. This can cause the “cool on” indicator to keep blinking. So, if you did have a power outage, the first thing to do is check your settings. , When you pull off the thermostat display, you’ll notice a USB port on the back. This is true for 1st, 2nd, and 3rd Generations as well as the Nest E, though the 1st Generation has a mini-USB port. Using the cable and plug provided, plug the thermostat into the wall to charge. You can also opt to plug the thermostat into your computer., Step 2 – Check to See if the Thermostat or the Clock are Set. Your thermostat could go into setup mode if you had a recent power outage or no power for a while. This can cause the “cool on” indicator to keep blinking. So, if you did have a power outage, the first thing to do is check your settings., 2 Power Cycle Your Thermostat. 2.1 Remove The Thermostat From The Subbase. 2.2 Take Out The Batteries. 2.3 Reinsert The Batteries And Reattach The Thermostat To The Subbase. 3 Reset The Thermostat. 3.1 Switch The Thermostat To The Off Position. 3.2 Locate The Breaker That Powers Your HVAC System And Turn It Off., Resetting a Honeywell thermostat is simple and only takes a minute or two to complete. Either refer to your Honeywell control manual to reset it or follow the guide below that outl..., What “Cool On” Blinking Means: The “Cool On” blinking on a Honeywell thermostat indicates it is in a delay mode, often a safety feature, before activating the air conditioner.; Common Causes for Blinking: Power loss, recent power outage, and thermostat’s internal checks are the common causes for the blinking message.; Quick …, Here is how to reset a Luxpro thermostat: Locate the reset button on your device (it is small and has “H.W. Reset” or “R. Reset” written on it). Press and hold the button for a few seconds (about 5 seconds) The screen will blink, then the thermostat will automatically reset itself., A blinking “Cool On” message can indicate various causes, such as dying batteries, a power surge, or a power outage. Thermostat batteries generally last for an average of 10 months, making it easy to identify when dead batteries are responsible for the blinking message. However, sometimes a Honeywell thermostat can recuperate after a power ..., Google’s Nest unit today launched its newest thermostat. At $129, the Nest Thermostat is the company’s most affordable one yet, but it’s also the first to feature a new swipe and t..., 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 ... , 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..., Aug 8, 2023 · How to Reset Honeywell Thermostat. Resetting your Honeywell thermostat is a simple and painless process. Begin by pressing the reset button on the side of the thermostat, then wait for the display to clear. Next, press and hold down both the “up” and “down” buttons until all segments of the display flash twice. , When you turn thermostat on and set your temperature sometimes it has a five minute delay built in to let compressor balance out. It has been more than 5 mins. 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., The average person blinks 15 to 20 times per minute. Since the average American sleeps 6.8 or 6 hours and 48 minutes per day, they spend 1,032 minutes being awake. If the average A..., Flashing lights on your thermostat are a sign of this problem. • The Cool On display on your thermostat may flash for a few minutes after you replace the batteries. • A Cool On flash might sometimes be a thermostat’s way of informing you when the battery is low. Although some Honeywell thermostats include a distinct low battery indicator., The PSD011Ba and PSD022Ba are battery-powered, non-programmable digital heat & cool thermostats manufactured by Lux Products Corporation. These thermostats are designed to provide easy temperature control for heating and cooling systems. They feature a large, easy-to-read backlit display, quick and easy temperature change buttons, a fan switch ..., 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..., 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., 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., 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., Wait 5-10 minutes. Your thermostat could be facing a slight delay in restarting and activating …, First Stage of COOL Energized in HEAT Energized in COOL Power supply Use either O or B terminals for changeover valve. Optional 24 VAC common connection when thermostat is used in battery power mode. Factory-supplied jumper R Y C W/E G W2 O B COMPRESSOR RELAY FAN RELAY AUXILIARY COOL CHANGE OVER VALVE HEAT CHANGE OVER VALVE C R L2 L1 (HOT), How to Reset Honeywell Thermostat. Resetting your Honeywell thermostat is a simple and painless process. Begin by pressing the reset button on the side of the thermostat, then wait for the display to clear. Next, press and hold down both the “up” and “down” buttons until all segments of the display flash twice., A capacitor can do that. If the heat pump is running now, it should be ok. Emergency heat runs the electric heat strips only, it uses a lot more electricity. If the system wasn’t defrosting properly, it could have a bad defrost board. You should get that looked at if it’s freezing up outside and not switching to cool automatically (with ..., This exchange-traded fund is positioned to give investors exposure to companies taking meaningful steps toward reducing greenhouse gas emissions -- will it work and will it make yo..., Is the “Cool On” message solid (not blinking) on the thermostat display? Verify your thermostat’s wiring. Check that the wires are connected securely to the terminals. Remember, the color of the wires only relates to the terminals they are connecting. Reference: The Y terminal on your thermostat controls the primary (1st stage) cooling.