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Over 18 million households have a LUX thermostat and from time to time, they need a little “TLC”. If your thermostat is not working properly, then you’re in the right place. We provide a list of manuals for the most popular models as well as some general troubleshooting tips to get your HVAC system back up and running.

Lux Thermostat Manuals

It can sometimes be difficult to find the correct instruction manual for your device, particularly for older, discontinued models.

Use the search bar below to find your specific Lux Thermostat Manual. You can enter the model number, name or description. We’ve also included images to help.

If you have a manual you would like to list, submit it here. Or, if your model is not listed, leave a comment below.

All imagery and manuals are copyright © Lux. Please visit https://www.luxproducts.com/ for the most up to date manuals and product information. You can read our DMCA policy here.

Model Image Model ID Description Document Updated Downloads
CS1
Wi-Fi Thermostat 2019 Installation Manual
Document(s) Updated: 2019
KONOzw
Smart Hub Thermostat 2019 Installation Manual
Document(s) Updated: 2019
Konoz
Smart Hub Thermostat 2018 Instruction Manual
Document(s) Updated: 2018
Smart Temp®
WIN100
Electronic Thermostat 2018 Installation Manual
Document(s) Updated: 2018
Kono
Smart Thermostat 2017 Installation Manual
Document(s) Updated: 2017
TX700U
Universal Thermostat 2015 Installation Manual
Document(s) Updated: 2015
TX9100Ua
Universal 7-day Programmable Thermostat 2014 Instruction Manual
Document(s) Updated: 2014
Smart Temp
TX1500Uc
Universal 5/1/1-day Programmable Or Non-programmable Thermostat 2014 Instruction Manual
Document(s) Updated: 2014
Smart Temp
TX500Ub
Universal 5/2-day Programmable Or Non-programmable Thermostat 2014 Instruction Manual
Document(s) Updated: 2014
Smart Temp
TX500Uc
Universal 5/2-day Programmable Or Non-programmable Thermostat 2014 Instruction Manual
Document(s) Updated: 2014
TX9100Uc
Universal 7-day Programmable Thermostat 2014 Instruction Manual
Document(s) Updated: 2014
TX9100Ub
Universal 7-day Programmable Thermostat 2014 Instruction Manual
Document(s) Updated: 2014
TX100E
7 Day or 5/2 Day Programmable or Non-Programmable Thermostat 2014 Instruction Manual
Document(s) Updated: 2014
LV21
Mechanical Line Voltage Thermostat 2014 Instruction Manual
Document(s) Updated: 2014
Single-Pole, Heating Only
LV11
Mechanical Line Voltage Thermostat 2014 Instruction Manual
Document(s) Updated: 2014
TX9600TSa
Universal 7-day Programmable Touchscreen Thermostat 2013 Installation Manual
Document(s) Updated: 2013
Smart Temp
TX500Ua
Universal 5/2-day Programmable Or Non-programmable Thermostat 2013 Instruction Manual
Document(s) Updated: 2013
Smart Temp®
TX1500U
Universal 5/1/1-day Programmable Thermostat 2013 Installation Manual
Document(s) Updated: 2013
Smart Temp®
TX1500Ua
Universal 5/1/1-day Programmable Or Non-programmable Thermostat 2013 Installation Manual
Document(s) Updated: 2013
DMH110b
Non-Programmable Thermostat 2013 Installation Manual
Document(s) Updated: 2013
TX9600TS
Universal 7-day Programmable Touchscreen Thermostat 2011 Instruction Manual
Document(s) Updated: 2011
TX9100U
Universal 7-day Programmable Thermostat 2011 Instruction Manual
Document(s) Updated: 2011
Smart Temp®
TX500U
Universal 5/2-day Programmable Thermostat 2011 Instruction Manual
Document(s) Updated: 2011
LHP-750
Versatile Heat Pump Thermostat 2010 Installation Manual
Document(s) Updated: 2010
EcoStat®
TH10
Heating Only Mercury FREE Manual Thermostat 2009 Instruction Manual
Document(s) Updated: 2009
TX500E
Programmable Thermostat 2008 Installation Manual
Document(s) Updated: 2008
Smart Temp
TX9000TS
Electronic Thermostat 2008 Instruction Manual
Document(s) Updated: 2008
Ultra 1000
TX1000
Thermostat 2007 Installation Manual
Document(s) Updated: 2007
T10-1143SA
Heating & Cooling Thermostat 2007 Instruction Manual
Document(s) Updated: 2007
T10-1141SA
Heating Only Thermostat 2007 Instruction Manual
Document(s) Updated: 2007
LV1, LV2, LV3
Mechanical Line Voltage Thermostats 2006 Instruction Manual
Document(s) Updated: 2006
TX9000a
Electronic Thermostat 2006 Instruction Manual
Document(s) Updated: 2006
Smart Temp
TX9000a
Electronic Thermostat 2006 Instruction Manual
Document(s) Updated: 2006
Smart Temp®
TX1500b
Electronic Thermostat 2006 Instruction Manual
Document(s) Updated: 2006
T20-1141SA
Heating Only Thermostat 2006 Instruction Manual
Document(s) Updated: 2006
T40-1143SA
Heating & Cooling Thermostat 2006 Instruction Manual
Document(s) Updated: 2006
Smart Temp®
TX500b
Electronic Thermostat 2006 Instruction Manual
Document(s) Updated: 2006
T40-1143SA
Heating & Cooling Thermostat 2006 Instruction Manual
Document(s) Updated: 2006
TX1500E
Programmable Thermostat 2006 Installation Manual
Document(s) Updated: 2006
105/2110 Series
43318
Heat Pump Digital Thermostat 2005 Installation Manual
Document(s) Updated: 2005
CAG1500
CAG1500 Series 2005 Installation Manual
Document(s) Updated: 2005
Tx250 Series
TX250
Smart Temp Electronic Thermostat 2004 Instruction Manual
Document(s) Updated: 2004
ELV1, PSPLV510
Programmable Line Voltage Thermostat 2004 Instruction Manual
Document(s) Updated: 2004
Dmh100 Series
DMH100
Digital Mechanical Thermostat 2004 Instruction Manual
Document(s) Updated: 2004
120-1141
Deluxe Heating Only Thermostat 2001 Installation Manual
Document(s) Updated: 2001
T40-1143
Deluxe Heating & Cooling Thermostat 2001 Installation Manual
Document(s) Updated: 2001
T10-1141
Heating Only Thermostat 2000 Installation Manual
Document(s) Updated: 2000

How to find your Lux Thermostat Model Number?

To find the correct manual for your Lux thermostat, you need to identify the model number of the device. Usually, the thermostat comes with a sticker that contains the serial number – typically on the back of the thermostat. You can usually slide the thermostat off its base to reveal the model and serial number.

Lux Thermostat Troubleshooting

How to carry out a Lux Thermostat filter reset?

Usually, the thermostat will tell you when it needs an air filter change. In some cases, you will see the word “Filter” flashing on the display. The filter is not related to the thermostat itself, but it still needs a change. To change your filter efficiently and effectively, you will need to refer to the guide of the manufacturer of your HVAC system. This will be different for everyone. Even with the filter needing a change, your thermostat will continue to function as usual.

Another thing you can do is turn off the filter reminder on your thermostat. To do that, click on “Air Filter” on the display of the thermostat. After you click on “Next”, you will see the “Filter Limit” words flashing. Keep pressing the “Down” button until you get to 360 days. If you want to turn off the reminder completely, change its setting to “Off”.

How to troubleshoot your Lux thermostat not working?

There may be several reasons why your Lux thermostat isn’t working, so this is not an easy question to answer. There are, however, some common causes that you can investigate. The first and easiest thing you can do is replacing the batteries. Perhaps the batteries in your thermostat are old and at the end of their life.

The next thing you can do is check the circuit breaker. If nothing is wrong with the batteries, your thermostat may not be receiving power at all. If that’s not the case, you can move on to the wiring. Check the wires to make sure there isn’t any damage there..

Another thing you can do is to reset the thermostat. If the issue persists, contact Lux’s customer support or invite an electrician over and ask them to have a closer look at your faulty thermostat.

What to do if the Lux is not cooling?

If your Lux thermostat is not cooling, there might be something wrong with the wiring or the actual thermostat. There are some things you can do to check what’s wrong with it. First, try restarting the thermostat. This is nothing revolutionary, but it works! Find the power button and switch your thermostat off. Then turn it on again using the same power button and see if that did anything.

A restart is the easiest solution. If that didn’t work, it’s time for a reset. A reset is a bit more complex, as it may break all of your programs and routines. To reset your thermostat, click the reset button and hold it for 5-10 seconds.

Another common issue with thermostats that stop cooling is that they are just dirty. Perhaps dust has accumulated in one part of the thermostat, preventing it from working properly. Clean it up!

How to set a Lux thermostat?

Setting the temperature on your Lux thermostat is easy. You can also create programs that will fit your schedule. First, select the mode you want (heat or cool). Then, press “Menu” and “Scroll”. You should be able to set and review your programs. Press “Ok” and program all days of the week, from Monday to Friday.

You will start with the Monday morning period by selecting a start time. Press “Next” and set the temperature for the program. Press “Next” again and continue to the next time period. Keep in mind that your changes won’t save automatically, so make sure to save them!

Each day has 4 periods. Once you’re done with all of them, you can move on to the next day. Once you’re done with all days of the week, exit the review mode and go back to using your thermostat as you usually do.

How to lock & unlock a Lux thermostat?

If you’re afraid of family members tampering with your thermostat settings, you can lock the screen. It will then require a four-digit code to allow access. Here is how to get that set up:

Put the “System Mode” switch into “Heat” or “Cool”. The “Set Slide” switch should show “Run”. Once you’re there, hold the “Next” button for 5 seconds before you see the words “Lock Code” and “Set Code” on the screen. Select your four-digit code using the “Up” and “Down” buttons. Once you’re done, hold “Next” for 5 seconds.

When it comes time to unlock the thermostat, press and hold “Next” for 5 seconds. Enter the code to unlock the thermostat. Change each digit using the “Up” and “Down” buttons. Once you’re done with all the flashing digits, press and hold “Next” for 5 seconds. You will return to your normal thermostat screen with no passcode.

What to do if your thermostat won't change temperature?

If your Lux thermostat is not letting you change the temperature, the easiest thing you can do is perform a hardware reset. This type of reset does not erase your programs. All you have to do is take the front panel off the thermostat and find the reset button. Hold it for 5 seconds and release.

A software reset is a bit more challenging and it will erase all of your data. To do it, you need to place the “System Mode” switch in “Off”, and press and hold the “Up”, “Next”, and “Down” buttons at the same time for 5 seconds.

Finally, your thermostat might just be dirty. Perhaps a speck of dust got into the thermostat and is preventing it from functioning properly. Dust your thermostat with a clean brush and cloth. If nothing works, perhaps it’s time to contact support and request professional help.

Conclusion

Hopefully, these troubleshooting tips help you keep your Lux thermostat working! If nothing helps, don’t hesitate to refer to your manual and maybe even contact support if you’re still under warranty. 

You can get professional help from the Lux team, as well as your local electrician.

Sources

https://www.luxproducts.com/

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