The hardware reset is a push button that is located on the right edge of the circuit board, just above the battery location. This reset button is used by the thermostat to reset the unit’s clock, and read the position of all of the option switches. When any of the following items are changed, the hardware reset button must be pushed for the Take the front of the thermostat off the wall and look for a small white round reset button on the right side labeled “H.W. Reset”. Hold this button down for at least 5 seconds. The screen should fully populate temporarily. system. This will damage the thermostat and void your warranty. • All wiring must conform to local codes and ordinances. • This thermostat is designed for use with 24 volt and millivolt systems. The thermostat should be limited to a maximum of 1.0 amps; higher amperage may cause damage to the thermostat. If you are in doubt, call your utility company. View and Download Lux Products TX500b Series installation and operating instructions online. SMART TEMP ELECTRONIC THERMOSTAT. TX500b Series Thermostat pdf manual download. Nov 18, 2010 · the thermostat has an automatic timer that lets you know when it has run long enough for the filter to need replacing. there is a reset function to clear that message, but you'll need to get some direction from lux depending on the model number of your thermostat. Sep 12, 2018 · Consider when your home is empty to determine the best temperature settings. To set your Lux 500 thermostat, first pick "Cool" or "Heat" mode using the switch on the panel's lower left corner. Then, move the slide switch on the right to "Temp Program.". First you set the weekday temperatures.