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» Support TX9100E

Troubleshooting the Display
  • Problems that may be identified from the display of your programmable thermostat are listed here with suggested resolutions.
  • For more detailed information please refer to the instructions that came with your thermostat.
  • The instruction manual for this model can be viewed in PDF format by clicking here.

Model TX9100E
   
Problem Resolution
Display will not change Peel protective plastic label from display.
Display blurred and unreadable Peel protective plastic label from display.
Press the small round inset RESET button on the front of your unit using a small Philips screw driver.
Blank or fading display Replace thermostat  batteries with fresh AA size Duracell® or Energizer® alkaline batteries. Be sure that they are installed with their polarity (+ and -) correct.
Clean battery contacts with a pencil eraser and pry out the spring contact slightly to insure a clean, firm connection.
Press the small round inset RESET button on the front of your unit using a small Philips screw driver.
Display is locked or will not respond A lock code is needed to unlock this thermostat. To unlock the thermostat with the lock code press the NEXT button down for at least 2 seconds, then enter the code by using the NEXT button to advance to the next digit. Once entered press the NEXT button down until it returns to the default display. To unlock the thermostat with out the lock code, remove the thermostat from the wall and locate the jumper labeled JP1 and identify the brass pin next to the jumper. Remove the jumper and place it over the center pin and the pin that was previously exposed, then press the reset button.
Displays "LO BATT", "REPLACE", or battery symbol Replace thermostat  batteries with fresh AA size Duracell® or Energizer® alkaline batteries. Be sure that they are installed with their polarity (+ and -) correct.
Clean battery contacts with a pencil eraser and pry out the spring contact slightly to insure a clean, firm connection.
Display reads "Stage1" or "Stage1 + 2" or "Stage 1 + AUX" "Stage1" is displayed when the thermostat is turning on the first heating stage. "Stage1 + 2" is displayed when the thermostat is turning on the first and second stages of a conventional heating system. "Stage1 + AUX" is displayed when the thermostat is turning on the first and auxiliary heating stages on a heat pump.
What is the EMER/Copy button The EMER/Copy button is for copying temperature programs for heat/cool programming periods. The EMER setting is used with heat pump systems that have an emergency heat heating element.
Displays wrong room temperature. See Temperature Regulation. 
You want to change the displayed temperature scale from °F to °C or from °C to °F On the back of the thermostat are a block of small switches labeled OPTION SWITCHES. Switch 4 will change the thermostat between C and F. In the ON position the thermostat will read C. Anytime you change an option switch you must press reset for the changes to take effect. 
Shows "8888" on display Turn the dial to SET DAY/TIME and set the day and time. 
Shows "HI" or "LO" This means Out of Limit. The sensor is reading outside the thermostats display limit. Room temperature will reappear when the temperature returns to switching the range.  If actual room temp is not below freezing or above 99F/32C degrees, there may be a malfunction. Press the HW RESET button on the circuit board to reset. 
For further assistance: Contact your HVAC service company or our Technical Assistance Line if not resolved.
 
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