What does a thermostat do?
A thermostat, in the most simple terms, turns on the furnace or air conditioning system until the room temperature reaches the set temperature. Then, the thermostat turns the system off.

What does a programmable thermostat do?
Programmable thermostats automatically change the thermostat’s set temperature between comfort levels and energy saving levels at specified times, according to the programs you set up. Generally, to save energy, you would set up 4 program periods for each day – 2 comfort programs and 2 energy saving programs. Here is an example of typical comfort and energy saving program periods for weekdays:

Can a programmable thermostat be used to replace an existing conventional thermostat?
Yes, LUX programmable thermostats can be used to replace most conventional low voltage and millivolt thermostats. The same wires used for installation of conventional mechanical thermostats are used for installation of programmable electronic thermostats.

Can programmable thermostats really save energy?
Yes, programmable thermostats can save energy and save you money on utility bills. According to the U.S. Department of Energy, a programmable thermostat can reduce heating costs by up to 35% and cooling costs by up to 25%. Your savings will largely depend on the length of your energy saving program periods and the temperatures set. For example, an energy saving period of 10 hours with the temperature set back 10° will save more than a 5 hour energy saving period with the temperature set back 5°.

Of course I want to save money on my utility bills, but I don’t know anything about programming.
Don’t worry, almost all LUX programmable thermostats are pre-programmed with a typical energy-saving schedule, with separate programs built-in for Heat and Cool.

I work at night and I am home during the day. Can I easily make changes in a LUX pre-programmed thermostat to fit my schedule?

Yes! You can change any of the preset times and/or temperatures to suit your schedule. Many of our thermostats have easy instructions inside the door that explain how to select the program period you want to adjust.

Is there someone I can talk to if I have a question about the installation or operation of my LUX thermostat?
Yes, LUX has a staff of trained technicians to help you with any questions you may have. The technical assistance telephone number is (856) 234-8803.

How do I know if I have a system or C-wire?
The wires coming out of the wall will attach to a “lettered” terminal on the base of your thermostat. The system common terminal is labeled “C”; if you have a wire connected to this terminal, you are system powered.

What can I do if I don’t have a system common “C” wire?
Your local heating/cooling (HVAC) professional can install a “C” wire for your existing thermostat. Alternatively, you can use the LUX Power Bridge or the LUX USB power adapter kit.

Will using Alexa voice commands through the LUX Products Skill interfere with my LUX mobile app?
Changes requested through Alexa voice commands will be visible on the thermostat display screen, the mobile app, and in the my.luxproducts.com web portal.

How 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 can take up to five minutes to take effect on your thermostat. For the mobile apps, changes should take effect immediately when you are connected to the same wireless network as your thermostat. Changes made from other wireless networks or from outside your home can take up to five minutes to take effect.

What happens if my thermostat goes offline?

Your thermostat will maintain the schedule you have set for it even when it’s not connected to the Internet. To reconnect your thermostat:

First check that 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.

If that doesn’t work, confirm that your thermostat is connected to your router. If your thermostat is connected to your WiFi router, you’ll see a WiFi icon on the upper right hand corner of the screen. If not, your thermostat is not connected to your router, and you should continue with the suggestions below until your thermostat is connected to your router again.

Try resetting your thermostat. Remove the thermostat from the wall and press the RESET button on the back. Once pressed, replace the thermostat on the wall. Once the thermostat is connected to your router, it will display a WiFi icon on the upper right hand corner of the thermostat’s screen.

If none of the above steps resolves the issue, you should perform the setup process again. Consult the product manual for instructions.

My HVAC system isn’t heating or cooling when I want it to

For Heat Pump systems, ensure that the thermostat is configured for the Heat Pump system type.

If you want to cool your home, make sure that your thermostat is in Cool or Auto mode and that your target temperature is below the ambient temperature shown on the thermostat. If you want to heat your home, make sure that your thermostat is in Heat or Auto mode and that your target temperature is above the ambient temperature shown on the thermostat.

If the thermostat was just installed, review the wiring connections that were made for any errors. Make sure you were using the correct wiring diagram for your specific heating/cooling system type.