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Frequently Asked Questions

General Thermostat and Amazon Alexa Questions

  1. What does a thermostat do?
  2. What does a programmable thermostat do?
  3. Can a programmable thermostat be used to replace an existing conventional thermostat?
  4. Can programmable thermostats really save energy?
  5. Of course I want to save money on my utility bills, but I don’t know anything about programming. Can I really do this myself?
  6. 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?
  7. What is "Armchair Programming?"
  8. Is there someone I can talk to if I have a question about the installation or operation of my Lux thermostat?
  9. Will GEO work with Amazon Alexa?
  10. Can the GEO work with Alexa enabled devices?
  11. What do I need to know if I want to use Alexa with my GEO?
  12. How do I know if I have a system or C-wire?
  13. What can I do if I don’t have a system common “C” wire?
  14. How do I get my GEO to connect with Amazon Alexa?
  15. What are the commands that can be used for voice control of the GEO thermostat
  16. Will using Alexa voice commands through the LUX Products Skill interfere with my LUX mobile app?

1. 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.

2. 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. Following is an example of typical comfort and energy saving program periods for weekdays:

PERIODHEAT MODECOOL MODE
MORN 6:00 AM 70°F (21°C) 6:00 AM 78°F (26°C)
DAY 8:00 AM 62°F (17°C) 8:00 AM 82°F (28°C)
EVE 6:00 PM 70°F (21°C) 6:00 PM 78°F (26°C)
NITE 10:00 PM 62°F (17°C) 10:00 PM 75°F (24°C)

3. 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. See Feature Chart for detail on Lux models compatible with your system. Also see Instruction Guides.

4. Can programmable thermostats really save energy?
Yes, programmable thermostats can save energy and save you money on utility bills. According to the 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°.

5. Of course I want to save money on my utility bills, but I don’t know anything about programming. Can I really do this myself?
If you select a Lux Programmable Thermostat, every model is pre-programmed with a typical energy-saving setup - separate programs built-in for Heat and Cool - 4 program periods per day. No additional programming is necessary. We’ve done the programming for you! Every Lux Products Programmable Thermostat has been designed to be as easy to set and use as a clock radio. This is all you do: - Install the thermostat base on the wall.

Hold the thermostat body in your hand.
Insert the batteries.
Select "Heat" or &"Cool".
Press the "Reset" key to activate the built-in programs. built-in programs.
Set the current time and day of the week.
Snap the thermostat body on to the wall base and turn the power back on to your heating/cooling system.
Begin your automatic savings!
Any time you want to temporarily change the temperature, just use the up/down buttons next to the LCD display.
See Instruction Guides.

6. 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 use the built-in programs as is or change any of the preset times and/or temperatures to suit your schedule. Easy instructions inside the door of each thermostat model explain how to select the program period you want to adjust. Then you just use the up/down buttons next to the LCD display to change times and temperatures. It’s that simple.

7. What is "Armchair Programming?"
Armchair Programming is a feature which allows you to make programming changes with the thermostat body removed from the thermostat wall base and conveniently held in your hand. All Lux Programmable Thermostats are Armchair Programmable.

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

9. Will GEO work with Amazon Alexa?
YES, LUX/GEO is a smart thermostat and with Amazon Alexa, you can control your home comfort with your voice.

10. Can the GEO work with Alexa enabled devices?
YES, the Amazon Echo, Dot, and Tap, are all products that can utilize voice commands to Amazon Alexa.

11. What do I need to know if I want to use Alexa with my GEO?
Your LUX/GEO needs to be powered from your heating/cooling system via a system common wire (“C” wire), or with the LUX USB Power adapter kit (sold separately). A LUX/GEO using battery only power cannot support Alexa.

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

13. 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 or you can purchase the LUX USB power adapter kit (https://www.amazon.com/s?me=AQ930TZJ6RJS9&merchant=AQ930TZJ6RJS9).

14. How do I get my GEO to connect with Amazon Alexa?
With the LUX mobile app downloaded to your device and the account setup complete, in the Amazon Alexa mobile app menu under Skills, search for LUX Products and click enable.

15. What are the commands that can be used for voice control of the GEO thermostat?
In the Alexa mobile app under Skills, clicking into the LUX Products Skill will show the proper phrases for using voice commands with your LUX/GEO thermostat.

16. Will using Alexa voice commands through the LUX Products Skill interfere with my LUX mobile app?
Changes requested through Alexa voice commands should be visibly reflected on all of the following: thermostat display screen, the mobile app, and in the my.luxproducts.com web portal.