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Back to TopWhy should I set a heating and cooling schedule?

Setting a schedule saves you money and energy. Many people fail to set heating and cooling schedules because their thermostats are just too difficult to operate. Your account, by contrast, offers an intuitive interface that makes setting your schedule a breeze.

Back to TopWhat is ENERGY STAR®? Why should I follow its recommendations?

ENERGY STAR is a joint program of the U.S. Environmental Protection Agency and the U.S. Department of Energy. The program's purpose is to help us save money and protect the environment through energy efficient products and practices.

With the help of ENERGY STAR, Americans saved enough energy in 2010 alone to avoid greenhouse gas emissions equivalent to those from 33 million cars – all while saving nearly $18 billion on their utility bills.*

*source: energystar.gov

Back to TopI forgot the password used for my account. How do I recover it?

Visit the Reset Password page. We'll email you a special link that will allow you to change your password. The link is only valid for 24 hours.

Back to TopWhat is the Target Temperature?

It's the temperature your thermostat will keep your home at or near. If your home is in cooling mode, your cooling system will turn on if the temperature in your home rises above the target. If your home is in heating mode, your heating system will turn on if the temperature in your home falls below the target.

Back to TopExplain the four Modes. What's the difference between Heat, Cool, Auto, and Off?

If your home is in Cool mode, your cooling system will turn on if the temperature in your home rises above the target. Cool mode is best for the summer months, when there's no chance you'll want your heat system activated. Due to the liquid in the compressor coils, avoid running the AC during cold temperatures to prevent the liquid from freezing. To protect your cooling equipment from possible damage, do not use Cool mode when the outdoor temperature is below 50°F/10°C.

If your home is in Heat mode, your heating system will turn on if the temperature in your home falls below the target. Heat mode is best for the winter months, when there's no chance you'll want your cool system activated.

If your home is in Auto mode, heating or cooling modes will be automatically activated within the range of your heating and cooling schedules. Auto mode is for shoulder seasons and should not be used during full heating or cooling season. Due to the liquid in the compressor coils, avoid using Auto mode during cold temperatures to prevent the liquid from freezing. To protect your cooling equipment from possible damage, do not use Auto mode when the outdoor temperature is below 50°F/10°C.

If your home is in Off mode, you are not using your HVAC system to control your home's temperature.

Back to TopWhat are my Fan settings for?

When your fan is set to Auto, it remains off until needed to circulate warm or cool air through your home. When your fan is set to On, it runs continuously, even if your HVAC system is not actively heating or cooling your home. Setting your fan to Auto is the more energy-efficient choice.

Back to TopWhat does the Set Away button do?

Clicking on Set Away is an easy and convenient way to set your home to an energy-efficient temperature while you're away. Going back to your normal schedule is just as easy – click End Away when you return. You can change the thermostat's Away temperature on the Settings tab of the Thermostat page.

Back to TopWhat does the Hold button do?

The Hold button maintains your home at its current target temperature even if a schedule change should occur. It's there in case you deviate from your usual routine – you're throwing a party in your home, for example, and don't want your home to shift into its overnight temperature setting. You can find the Hold button on the thermostat's Schedule tab on the Thermostat page.

But don't just set your thermostat to Hold and leave it there! You'll miss out on the savings and efficiency only a schedule can provide. Use the End Hold button on the thermostat's Temperature or Schedule tab on the Thermostat page to resume your normal schedule.

Back to TopHow long does it take for changes I make on the website or mobile apps to take effect?

Changes you make to your thermostat settings from the website and mobile apps will generally be applied within one minute. Occasionally, it can take a few minutes to be applied to your thermostat due to network congestion or delays. Customers using a Lux iThermostat on battery power alone may experience a longer delay.

Back to TopWhat happens if my thermostat goes offline?

Your thermostat will maintain the schedule you've set even when it's not connected to the internet. To restore your thermostat connection:

For customers with a Carrier TXU iThermostat

  1. Check your thermostat power.
    Touch the screen to wake up the thermostat. If, after tapping the screen, it's still blank then your thermostat doesn't have power. Check the breaker for the HVAC system in the electrical panel to ensure it's in the "ON" position and not "OFF" or tripped. If power is still not restored, contact your HVAC contractor to have power restored to the HVAC system or us at 1-844-820-2914 to assist with additional troubleshooting steps.
  2. Confirm your gateway has power and is connected to your router.
    The gateway device connected to your router will have three green lights illuminated. If these lights are not illuminated please check that the device has power and the ethernet cable is connected to your router. If the lights are illuminated try power cycling the gateway by unplugging it for a minute, then plugging it back in. If, after a few minutes, the lights don't illuminate, then continue to step four.
  3. Check your thermostat's connection.
    If your thermostat is connected to the gateway you'll see a signal strength indicator on the top right of the thermostat screen. If there is no signal indicator, then continue to step below.
  4. Reset your router.
    Resetting or restarting your router will often clear up connection problems.

If you still need assistance, call us at 1-844-820-2914. We're always here to help.

For customers with a Lux TXU iThermostat

  1. Check your thermostat power.
    If the thermostat screen is blank, then your thermostat doesn't have power. Confirm that your thermostat is powered by batteries, C ("common") wire, or micro USB power adapter. If it's batteries, remove your thermostat from the wall and replace the batteries.

    If your thermostat still doesn't have power, check the breaker for the HVAC system in the electrical panel to ensure that it's in the "ON" position and not "OFF" or tripped. If power is still not restored, contact your HVAC contractor to have power restored to the HVAC system or call us at 1-844-820-2914 to assist with additional troubleshooting steps.
  2. Check your router
    Confirm your wireless router is working and you have access to the internet. If your internet connection or router is down, your thermostat will reconnect automatically when your internet connection is restored. Resetting or restarting your router will often clear up connection problems. If your thermostat is not connecting to the internet, then continue to the step four.
  3. Confirm your thermostat is connected to your router.
    If your thermostat is connected to your wireless router, you'll see a radio wave icon on the upper right hand corner of the screen. If there is no signal indicator, then continue to the step below.
  4. Reset your thermostat.
    Remove the thermostat from the wall. The RESET button is on the back of the thermostat. Press and hold the RESET button for three seconds until the screen resets. Once reset, replace the thermostat on the wall. After the thermostat has connected to your router, it will display a radio wave icon on the upper right hand corner of the screen.

If you still need assistance, call us at 1-844-820-2914. We're always here to help.

Back to TopHow do I move a thermostat to a different user account?

The easiest way to move a thermostat to a different user account is to share the thermostat. See the question "How do I share a thermostat with someone who has a different user account?"

Back to TopHow do I share a thermostat with someone who has a different user account?

You can share thermostat control with friends and family without sharing your password. Navigate to the Locations tab on your Profile. Select the "share location" link for the location you want to share. Now just enter the other person's email address, and they'll get an invitation to share access to the thermostats in that location.

Back to TopWill I get notification if my thermostat drops offline?

Yes, you'll get an automatic email notification when your thermostat has been offline for 24 hours without connecting. You can change your notification preferences for a thermostat on the Settings tab of the Thermostat within the TXU iThermostat Customer Portal website.

Back to TopCan I use my smartphone to control my thermostat?

Yes, currently we have mobile apps available for iOS (iPhone, iPad, iPod touch) and Android. Both apps allow you to manage your thermostat when you're on the go.

Back to TopI put my Thermostat in Auto mode. Why can't I change the Target Temperature?

If your thermostat is in Auto mode Heat or Cool modes will be automatically activated within the range of your heating and cooling schedules. You may notice that on the website and mobile apps you can't make any temporary changes to the current Target Temperature. In addition you won't see the current Target Temperatures for Heating and Cooling.

Currently those options are not available. To make a temporary Target Temperature change please select Heat or Cool mode, then choose a new Target Temperature.

Back to TopHow can I change my thermostat units from Fahrenheit to Celsius?

The units used on the website and mobile applications can be changed by logging into the TXU iThermostat Customer Portal website or TXU iThermostat app and editing your profile. On the profile page you can change your Temperature Preference. This change will be applied to the website and mobile applications.

Back to TopHow do I change the email address associated with my existing TXU iThermostat account?

Sign in to your account on the TXU iThermostat Customer Portal website. Once signed in to your account, click on your name in the top right corner of the screen and select "Account Info." Here you'll be able to change the email address associated with your iThermostat account only. Remember to contact TXU Energy if you need to update the email address tied to your electricity account. NOTE: You'll only be able to set your email address to one that has never been used to create a TXU iThermostat account. If you're looking to move your thermostats to another existing TXU iThermostat account, please see the question about moving thermostats. "How do I move a thermostat to a different user account?"

Back to TopWhat are Temperature Alerts?

Temperature Alerts send you an email when the temperature in your home falls outside a range you set. For example, you can ask to receive an email if the temperature inside your home falls below 50 °F. In this example, you will also receive an email once an hour until the temperature inside your home goes above 50 °F.

Back to TopWhat is HVAC Runtime?

With HVAC Runtime, you can monitor your HVAC system's performance. Find out just how much your heating and cooling system is running each day and why. Review historical data on the TXU iThermostat Customer Portal website or your mobile device.

Back to TopCan I download my Runtime data?

Yes, you can download the data on the TXU iThermostat Customer Portal website. Click the "Download last 30 days" button.

Back to TopWhat is Radius™?

Radius helps you save money and energy by automatically setting Away when your mobile device leaves an area that you define (a set distance around your location address). NOTE: This feature is currently available on iPhone and Android devices with location support.

Back to TopHow does Radius work?

Radius uses the location services built into your device to determine when you've left your location and turns on Away for your thermostat(s). For example, let's say you set a 5 mile radius. Once you've gone 5 miles from your home in any direction, Away mode will activate. On your way home, once you get within 5 miles, the app will turn Away mode off, and your normal schedule will resume.

Back to TopWith Radius, can I use multiple devices?

Yes, if your household has more than one supported device (currently available for iPhone and Android devices with location support) you can register each of these devices. Tap the Radius icon, then tap Update Devices to see which devices have been set up for Radius. A maximum of four devices is recommended.

Back to TopCan I remove a device from Radius?

Yes, tap the Radius icon, then tap Update Devices to see which devices have been set up for Radius. From this screen you can remove devices. In particular you may want to remove any devices you no longer own or want to control with Radius.

Back to TopIf I'm using Radius on multiple devices, can I override one of them?

Yes, you can override the Away or Home status of one of your devices. Tap the Radius icon, and then tap Update Devices. Tap the device you'd like to override to make a change.

Back to TopCan someone visiting my home override Radius?

If someone in the home manually adjusts the thermostat, Away mode will end, and your schedule will resume.

Back to TopWhat devices are compatible with Radius?

Radius is compatible with iPhone 4 and later generations of iPhone devices with location services turned on and OS 4.3 or higher. Radius is not compatible with the iPad. Radius is also compatible with Android devices with location services enabled.

Back to TopWhy is my runtime data unavailable?

Your thermostat collects data about when your heating or air conditioning system is operating. This data, called runtime, may not be reported due to the thermostat being offline, having a weak connection, or other thermostat errors. The most common reason your data may be missing is because your thermostat is currently offline or was offline during the time period being reviewed. For more information please see "What happens if my thermostat goes offline?"