How to Program a Lux Thermostat

Co-authored by Victor Belavus

Last Updated: July 5, 2023

Thermostats such as the Lux 500, the Smart Temp 9000, TX1500, Lux HP2110 are functional energy saving tools, but when the thermostat's schedule gets out of sync you could find yourself shivering unnecessarily. Follow these instructions to reprogram it to the schedule you want.

Steps

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Press "Up" to change the date. Press "Next" to set the time and then use the "Up" and "Down" keys to select the correct time.^{[2]
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The default heating temperatures are 6 AM - 70ºF, 8:30 AM - 60ºF, 3 PM 70ºF, and 11 PM 65ºF.^{[3]
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Switch on the "Heat" or "Cool" as appropriate.

Community Q&A

Question

How do I change the battery? In the display window it says "low battery." What should I do?

Community Answer

Remove the cover carefully, more than likely it snaps on at the bottom and hangs and pivots from two little fingers at the top, pull out on the snaps at the bottom and it should lift off at the top. Now you can see the batteries to tell what type they are. Replace them and mark the date down somewhere, they will need to be replaced in about a year.
Question

How do I reset a lux thermostat?

Community Answer

To unlock the thermostat without the lock code, press the RESET button. After pressing RESET then within the next 4 seconds press the UP button 3 times then the DOWN button once. This will reset the lock code to 0000. Replace thermostat batteries with fresh AA size Duracell® or Energizer® alkaline batteries.
Question

How do I set the heat temperature?

Community Answer

On the side, there should be a green button with an arrow facing upwards and a red arrow facing downwards. The green is to get hot, and the red is to get cold.