Troubleshooting Poor Temperature Regulation
• This page lists problems that may affect the temperature performance of your LUX
thermostat with suggested resolutions.
• For more detailed information please refer to the instructions that came with your
thermostat.
No fan function in heat mode
Move the switch or jumper on the circuit board to its
ELECTRIC position for electric heat.
Move Fan switch from ON to Auto
Remove the "G" wire. If fan continues to run, then
either the system is mis-wired, or the problem is in
the system, not the thermostat.
Indicates incorrect room
temperature
Refer to thermostat manual to verify that your set
temperature is what you expect it to be. The set
temperature is always flashing when it is visible.
"SET" is also visible then indicating that it is the set
temperature.
Your thermostat offers a calibration feature. This
feature may be used to adjust the displayed
temperature up to +5F(3C) or -5F(3C) degrees.
What does the SAVE feature
do
The SAVE button allows you to use one button
press to easily decrease the SET temperature in
winter and increase the SET temperature during
summer. Whenever you leave the house, touch the
Save button to put it in Save mode. By default this
will add 5 degrees to your set temperature in
cooling and subtract 5 degrees from your set
temperature in heating. When you return, touch the
Save button again to cancel the “Save” mode and
return your home to your previous SET
temperature.
Heats or cools more than 5
degrees past its displayed set
temperature
Refer to thermostat manual to verify that your set
temperature is what you expect it to be. The set
temperature is always flashing when it is visible.
"SET" is also visible then indicating that it is the set
temperature.
Remove thermostat body from the wall, leave the
back plate in place. Verify that Heating and cooling
switch off within a few minutes.
If the thermostat is battery powered only, replace its
batteries with fresh Duracell® or Energizer®
alkaline batteries.
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