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Lux LTX100E Programmable 7 Day Thermostat; 1 Heat, 1 Cool

4.4 4.4 out of 5 stars 483 ratings
$22.95 with 8 percent savings
List Price: $25.00

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LTX100E
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Purchase options and add-ons

Brand LUX
Model Name LTX100E-A04
Controller Type Manual
Special Feature For most 24V heating and A/C systems. 1-heat/1-cool: gas, oil, electric or single stage heat pump systems 2-wire heat only hydronic systems (hot water baseboard & radiator). Millivolt systems (wall heaters/furnaces & gas fireplaces) See more
Color White

About this item

  • EASY SCHEDULING: Set your home comfort level with convenient 7-day or 5/2-day program settings
  • IN YOUR COMFORT ZONE: Stay comfy with adjustable heating and cooling temperature limits
  • PASSCODE PROTECTED: The keypad lock prevents unauthorized use to keep your settings right where you want them
  • YOUR TEMP PREFERENCE: 2 or 4 periods per day puts comfort on your schedule
  • EASY-TO-READ DISPLAY: The backlit display keeps you clearly informed

Customer ratings by feature

Temperature Control
5.0 5.0
Easy to install
4.6 4.6
Accuracy
4.4 4.4
Easy to use
4.3 4.3
See all reviews
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Lux LTX100E Programmable 7 Day Thermostat; 1 Heat, 1 Cool
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From the manufacturer

Mod 1
Mod 2
Mod 3
Mod 5

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here. [PDF ]

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Lux LTX100E Programmable 7 Day Thermostat; 1 Heat, 1 Cool

Lux LTX100E Programmable 7 Day Thermostat; 1 Heat, 1 Cool

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Product guides and documents

User Manual (PDF)

Product Description

Versatile thermostat with 7-day, 5/2-day, or non-programmable options. Each day can be programmed separately with 2 or 4 periods per day. Features a lighted display, keypad lockout, manual temperature hold, and temporary override. Offers adjustable temperature differential, user temperature calibration, and heat/cool set temperature limit stops. Dual-powered for flexibility, with F/C temperature display and selectable time delay for equipment protection.

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Price-8% $22.95
List: $25.00		-27% $32.99
List: $44.99		-20% $24.00
List: $30.00		$37.69-12% $29.99
List: $33.99		$26.98
Delivery
Get it as soon as Thursday, May 16
Get it as soon as Tuesday, May 14
Get it as soon as Tuesday, May 14
Get it as soon as Tuesday, May 14
Get it as soon as Tuesday, May 14
Get it as soon as Tuesday, May 14
Customer Ratings
4.44.4 out of 5 stars483
4.44.4 out of 5 stars2,911
4.44.4 out of 5 stars29
4.64.6 out of 5 stars83
4.54.5 out of 5 stars718
4.64.6 out of 5 stars115
Easy to install
4.6
4.5
4.0
5.0
4.6
4.5
Temperature Control
5.0
4.4
5.0
5.0
—
—
Accuracy
4.4
—
—
—
4.4
4.5
Easy to use
4.3
—
—
—
4.6
4.5
Sold By
Lowest_Price_Highest_Quality_Fastest_Shipping
Lowest_Price_Highest_Quality_Fastest_Shipping
Lux Thermostats
Supply House Market Place (s/n recorded)
ACCPWR
Mroinge
control method
application
touch
—
—
application
—
controller type
Manual
touchpad control
Hand Control
Push Button
Push Button
Push Button
shape
Rectangular
—
Rectangular
Square
Rectangular
—
mounting type
Wall Mount
Wall Mount
Wall Mount
—
—
—
has backlight
✓
✓
✓
✓
✓
✓
weight
—
—
0.11 pounds
—
0.36 pounds
0.36 pounds

Customer reviews

4.4 out of 5 stars
4.4 out of 5
483 global ratings

Customers say

Customers like the appearance and value of the HVAC control thermostat. For example, they say it looks good, has a big number, and is easy to program and use. That said, some complain about the battery life. Opinions are mixed on adjustability and quality.

AI-generated from the text of customer reviews

133 customers mention102 positive31 negative

Customers like the ease of use of the HVAC control thermostat. They say it's user-friendly, and easy to program. They appreciate the lighted display and the wiring diagrams are easy to understand. They also mention that the programming options are numerous and the thermostat is fully programmable for 4 time periods per day.

"Replaced older model. Wasn't ready to go full smart. Easy to install. Good instructions." Read more

"...Lighted display is great! Wiring diagrams are easy to understand if you are replacing an existing thermostat. Not so sure about new installations...." Read more

"...As far as the remaining features, the Lux is user-friendly and easy to program. Reasonably priced, as well. Five stars from me!" Read more

"...Easy to follow instructions, labels for wires. took all of 10 minutes to install. Of the 10 minutes, 5 were waiting to check heat was coming on...." Read more

100 customers mention82 positive18 negative

Customers like the performance of the thermostat. They mention that it works well, works perfectly with their Trane A/C unit, and is a very good product.

"These thermostats work great. Not everyone has a system that the Google Nest works with. This will work with a system without a control wire...." Read more

"Works well enough. My only gripe is the first button press only turns on the LCD backlight and view the current room temperature...." Read more

"...Everything works as it should, but I really appreciate the settings menu. I have never had a thermostat with this menu before, and I love it...." Read more

"...Well To my great surprise it works GREAT...." Read more

59 customers mention55 positive4 negative

Customers appreciate the value of the thermostat. They say it's easy to swallow, and is the cheapest digital programmable unit they can find. Some say it saves them money the first month.

"...Great price, too. Very happy with this purchase." Read more

"...this is a high quality thermostat that will do the job at a reasonable purchase price." Read more

"...Reasonably priced, as well. Five stars from me!" Read more

"Very easy to hook up. Well worth the money." Read more

32 customers mention25 positive7 negative

Customers like the temperature adjustment of the product. They mention it's a great programmable thermostat, simple, and easy to install and use. It has 7-day programmability, and it'll allow you to set the temperature sway. It also has 4 separate time/temp settings, plus different settings for weekends. Overall, most are satisfied with the temperature control capabilities of the thermostat.

"Controls on the front panel, easy to see. Lighted display is great!..." Read more

"...after reading the instructions a few times, I was able to program the thermostats pretty simply" Read more

"...The multiple time settings and the display are nice. On the negative side is the programming of it...." Read more

"...reason for so many button presses is because the unit never displays BOTH the programmed temp and the actual temp at the same time...." Read more

24 customers mention24 positive0 negative

Customers are satisfied with the appearance of the HVAC control thermostat. They mention that it looks good, has a nice display, and is easy to program and use. Some say that the product is easy on the wall and looks modern.

"...The multiple time settings and the display are nice. On the negative side is the programming of it...." Read more

"...Much more modern definitely...." Read more

"...All in all though it works and looks great with a nice light up display and at a really great price." Read more

"...But these are nice, simple thermostats that I think are better than the Honeywells we had before...." Read more

19 customers mention12 positive7 negative

Customers are mixed about the quality of the thermostat. Some mention that it's a high quality thermostat that will do the job at a reasonable price, while others say that it is very cheaply made with bad electronics and has a cheapie plastic look and feel to the buttons.

"...Considering the price, this is a high quality thermostat that will do the job at a reasonable purchase price." Read more

"...The old Lux was more intuitive. It has a very cheapie plastic look and feel to the buttons...." Read more

"...Both brands are reliable and have accurate thermometers...." Read more

"...Otherwise, appears to be well made and have basic, useful features. Pity will not work with heat pumps with auxiliary heat strips...." Read more

14 customers mention8 positive6 negative

Customers are mixed about the adjustability of the HVAC control thermostat. Some mention that they like the adjustable swing setting, calibrate, and adjustable differential feature. Others say that it has too many functionalities and is difficult to change settings. They also say the advanced settings are proprietary and the default modes are in extremely confusing configurations.

"...The good part is the swing adjustment. Adjustable in increments of .25 degrees allowing for 0 to 2.25 degree swing...." Read more

"...and programming is overall easier except some of the advanced settings are very proprietary (some are just numbers. Setting #1, 1, 2, 3, etc.)..." Read more

"...for oil-fired boilers with cast iron radiators because of the adjustable swing setting." Read more

"...only be changed in 15 minute increments and the night time setting can not be set past 11:45 pm. Other than this issue they are great for the money." Read more

15 customers mention4 positive11 negative

Customers are dissatisfied with the battery life of the HVAC control thermostat. They mention that it shuts off almost immediately, the batteries are dead already, and it does not last long enough. Some say that the thermostat also wouldn't always turn off the heater when it was supposed to. Overall, customers are disappointed with the product's battery life.

"...start times is easy after a little practice, but there are no stop times, meaning a time zone will simply move on to the next zone...." Read more

"...programmed (this usually very reliable) but then shuts down before reaching the set temperature...." Read more

"...The boilers run long enough to get the radiators nice and hot, without overshoot...." Read more

"...A month in use, and the batteries are dead already??..." Read more

Easy two wire installation in my case
5 Stars
Easy two wire installation in my case
Easy two wire installation in my case. My needs are basic for now, so spending a lot wasn't desirable. Looks pretty good on the wall as well.
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Top reviews from the United States

Amazon Customer
5.0 out of 5 stars Works perfectly. Easy install.
Reviewed in the United States on April 13, 2024
Style: P711Verified Purchase
Replaced older model. Wasn't ready to go full smart. Easy to install. Good instructions.
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Denny B.
5.0 out of 5 stars Easy
Reviewed in the United States on May 4, 2024
Style: P111010Verified Purchase
Very easy to hook up. Well worth the money.
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Joshua
4.0 out of 5 stars Pretty good. Very basic, but functional. Whole numbers only.
Reviewed in the United States on November 9, 2016
Style: LTX100EVerified Purchase
So far I'm pretty impressed. My old one was starting to have troubles (it would actually randomly cut the fan off and on a lot during cooling) so I decided to take a chance on a brand I've never heard of. One of the first things I noticed between the two is the old one is a lot more old fashioned with huge capacitors and resistors everywhere and etc while this one has almost nothing at all on the back end of the board and presumably small SMD components on the front. Much more modern definitely. The screen is very clear and easy to work with -- far better than the old one -- and programming is overall easier except some of the advanced settings are very proprietary (some are just numbers. Setting #1, 1, 2, 3, etc.) If you lose the manual you have to pull it apart to see the very minimal guide on the inside (which doesn't go into details) or google for another copy of the manual. Chances are you never need to change any of those after the first time though and I'd bet that it remembers them even if the batteries die.

Pretty much the only real room for improvement I really saw is that, as usual, there are only whole numbers. With Fahrenheit this isn't as big of a deal, but if you like to use Celsius as I do, at many times you really kind of want a bit more precision (0.5 intervals would probably be perfect.) One degree change in Celsius is equivalent almost to two degrees Fahrenheit (more or less anyway,) so while I understand the oversight since most develop these with Fahrenheit in mind, it is a bit annoying that so few think of this. I set the swing temperature a bit higher (setting #8, value on 2 if I recall) and it helps a bit since it will cool just a tiny bit more before it shuts off, but it also takes a bit longer to kick in I suppose. After some playing around I seem to have found a point that is fairly comfortable anyway, but it seems silly because I tested its temperature calibration and I think it internally does actually recognize 0.1C precision internally, it just doesn't give you access to that level of precision.
4 people found this helpful
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C. S. Decristofaro
5.0 out of 5 stars When something works. . .
Reviewed in the United States on January 29, 2024
Style: P711Verified Purchase
These thermostats work great. Not everyone has a system that the Google Nest works with. This will work with a system without a control wire. The setup was a little slow going but after reading the instructions a few times, I was able to program the thermostats pretty simply
One person found this helpful
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Dale Kleber
5.0 out of 5 stars Unlike other models Lux thermostats allow you to set the "Swing"
Reviewed in the United States on October 30, 2023
Style: LTX100EVerified Purchase
I have an steam boiler that heats an old brick three-flat. For the steam to be evenly distributed to all units, the boiler must be energized for an extended period of time. So I need to set "the swing" (the degree difference between the cut-on and cut-off settings) at 2.5 degrees. But most of the current thermostats don't allow you to program the swing (which is factory set, usually at 0.25 or 0.5 degrees). If I used those thermostats, the first floor unit would be warm and the third floor unit would be cold. So I appreciate that Lux thermostats allow the customer to set the swing according to their unique needs. Plus a wider swing will prevent your boiler or furnace/AC from cycling excessively. As far as the remaining features, the Lux is user-friendly and easy to program. Reasonably priced, as well. Five stars from me!
2 people found this helpful
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Beth
5.0 out of 5 stars Great, simple thermostat
Reviewed in the United States on April 19, 2024
Style: P711V-010Verified Purchase
Works the way we want it to - and we have control (unlike with a smart thermostat). Great price, too. Very happy with this purchase.
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Richard Zunkel
4.0 out of 5 stars Great thermostat but wiring terminals require are not user friendly
Reviewed in the United States on August 26, 2023
Style: LTX100EVerified Purchase
Controls on the front panel, easy to see. Lighted display is great! Wiring diagrams are easy to understand if you are replacing an existing thermostat. Not so sure about new installations. My only complaint is the terminal block. If you are a DYI installer, you will need a tiny screwdriver and a forceps or tweezers to insert wires into the terminal spaces. Older LUX models had big screw terminals. This is important because you will likely find that the wires are solid conductors and not forgiving to too much twisting and bending. So be careful not to break a wire or you may be forced to pull a new set all the way from the furnace J box. That said, if you wired it correctly, it will work flawlessly. Programming start times is easy after a little practice, but there are no stop times, meaning a time zone will simply move on to the next zone. Considering the price, this is a high quality thermostat that will do the job at a reasonable purchase price.
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Matt H
5.0 out of 5 stars Good instructions, easy to install
Reviewed in the United States on March 4, 2024
Style: P711Verified Purchase
I used this on electric baseboard heaters that had a low voltage connection via my power panel. Easy to follow instructions, labels for wires. took all of 10 minutes to install. Of the 10 minutes, 5 were waiting to check heat was coming on. Easy to program as well if you want it.
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Top reviews from other countries

Brio
5.0 out of 5 stars Works well, easy to install
Reviewed in Canada on January 7, 2019
Style: LTX100EVerified Purchase
The only thing I found difficult about installation was having to drill a couple of new holes in the wall because it didn't fit the same way as the old one. Other than that it was straightforward. I really like the flexibility of the settings and I had to experiment with them a bit at first to get things just right. I'm quite satisfied with the way I have it set up now. It's definitely better than the one I replaced with it. I really like the fact that it uses AA batteries instead of AAA because they're less expensive. I also like the fact that it has a three-year warranty instead of just one-year. I definitely recommend this model.
3 people found this helpful
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Solly
5.0 out of 5 stars Thermostat has an adjustable temperature differential.
Reviewed in Canada on May 22, 2022
Style: LTX100EVerified Purchase
This is the best thermostat I have ever installed on basic heat/cool system!
The display has huge easy to read numbers and a backlight that lights up for 10 seconds.
It's simple to install, program and calibrate if required.
There are Hold and Override functions too.
I purchased it because most other brands do not have such a low differential setting available and cause the rooms to have huge uncomfortable temperature swings. This thermostat is so good it keeps the rooms at a steady comfortable temperature.
Only negative is it has to be unclipped from its back wall plate to change the batteries.
One person found this helpful
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Kevin Taylor
4.0 out of 5 stars Simple yet effective. 😁👍
Reviewed in Canada on January 8, 2021
Style: LTX100EVerified Purchase
Works like a charm.
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surjit
5.0 out of 5 stars Lots of programming options. Unbelievable low price compared to other brands
Reviewed in Canada on December 26, 2019
Style: LTX100EVerified Purchase
So many programming options and the installation was a piece of cake. Programming instructions were so easy to follow.
Works like a charm. Replaced a manual 28 years old Honeywell thermostat in my house (with mercury switch). It looks beautiful (stunning optics). I am very happy with this thermostat. Actually I bought 4 more. Two for a charitable organization and a friend of mine wanted two. Thanks
One person found this helpful
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kevin
5.0 out of 5 stars good thermostat
Reviewed in Canada on January 17, 2023
Style: LTX100EVerified Purchase
thank you got it today! thank you.... fits great! just what i needed! very fast shipping too was easy to install
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