How to Troubleshoot a Lux 1500 Thermostat

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Contact a qualified HVAC technician if after troubleshooting your thermostat your furnace or cooling unit still isn't working.

The Lux TX1500 thermostat can make regulating your furnace or cooling unit's temperature a simple process, but it may fail to work if it isn't properly connected, if there are loose parts or if it's experiencing power problems. With its programmable features, the TX1500 can be used with most 24-volt gas, oil or electric heating and air conditioning units and heat pumps. If your thermostat isn't performing well, inspecting and solving common problems may boost your heating or cooling unit's performance.


Step 1

Remove your Lux TX1500 thermostat from the mounting bracket on the wall and check the connections if it isn't turning on or regulating your cooling or heating unit.

Step 2

Shut off the power to the thermostat. Tighten the seven electrical terminal screws to which the wires are attached if they are loose, and make sure the wires aren't touching each other.

Step 3

Locate the electric/gas heat selector on the back of your unit if the blower isn't operating. Move the selector to the "ELEC" position.


Step 4

Remove the thermostat from the mounting bracket if you see a low battery indicator on your device's screen.

Step 5

Open the battery compartment and replace the old batteries with two new AA size alkaline batteries. Place the thermostat back on the mounting bracket.


Kefa Olang

Kefa Olang has been writing articles online since April 2009. He has been published in the "Celebration of Young Poets" and has an associate degree in communication and media arts from Dutchess Community College, and a bachelor's degree in broadcasting and mass communication from the State University of New York, Oswego.