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White rectangular wall thermostat with touch display

LUX LTX500U-A04 Smart Thermostat 5-2 Day Wi-Fi White

SKU CH-Y1EH-C6JKE

A Wi-Fi thermostat with 5-2 day scheduling, touch control, and universal HVAC compatibility except electric baseboard heat

  • Connection protocolWi-Fi
  • Product colorWhite
  • Product typeLTX500U (5-2 Day)
  • Key featuresProgrammable
  • Product dimensions4.875 in × 3.125 in × 1.125 in
  • In the boxThermostat
  • Control heating and cooling on your schedule with separate weekday and weekend programs
  • Works with most HVAC systems including single and multi-stage heat pumps
  • Graphical air filter monitor shows when a change is needed
  • Speed-slide interface makes programming quick and intuitive
  • Connects via Wi-Fi for remote access and smart-home integration

Smart thermostat for 5-2 day scheduling

The LUX LTX500U-A04 is a Wi-Fi connected programmable thermostat designed for homeowners who want separate weekday and weekend schedules. It controls heating and cooling systems including single and multi-stage heat pumps, boilers and furnaces. The touch-screen interface and exclusive speed slide simplify daily adjustments. It is not suited for electric baseboard heating systems.

Battery powered 24 V AC operation

The unit runs on two AA batteries while drawing 24 volts AC from the HVAC system, so normal use adds negligible load to the household circuit. A graphical air filter monitor alerts you when the filter needs changing. No fan or compressor noise originates from the thermostat itself. The compact rectangular housing measures 4.875 in wide, 3.125 in high and 1.125 in deep.

5-2 day programming with four periods

The defining specification is the 5-2 day schedule that lets you set up to four comfort periods for weekdays and a separate four-period schedule for weekends. Selectable smart recovery learns how long your system takes to reach the target temperature and starts early to meet it. Buyers who need seven independent daily schedules or geofencing control should consider other models.

How it compares

Measured against everything we stock in Wi-Fi Thermostats, at today’s prices. Recalculated every night.

Price $49.99
Cheaper than about 74% of the 78 comparable items (median $74.99).

Specifications

Product
Brand nameLUX
Model nameLTX500U-A04
Part numberTX500U
Product colorWhite
Product typeLTX500U (5-2 Day)
Connectivity
Connection protocolWi-Fi
Size & build
Product dimensions4.875 in × 3.125 in × 1.125 in
In the box
In the boxThermostat

Questions about this item

How do I wire the LTX500U-A04 to my 24 V AC system, and which step do DIYers most often miss?

Turn off power, label each wire before removing the old unit, connect the labelled wires to the matching terminals on the new thermostat, insert two AA batteries, then restore power; the step most often missed is labelling the wires before disconnecting them.

What ongoing maintenance does the LTX500U-A04 require?

Replace the two AA batteries roughly once a year and change the HVAC air filter when the on-screen graphical filter monitor indicates it is due.

What is the first limitation I will hit if the LTX500U-A04 runs continuously in a multi-stage heat-pump system?

The thermostat supports up to four programmable periods per day for weekdays and weekends separately; beyond that scheduling granularity you cannot add more set-back intervals without overriding the program manually.

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