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» Support CAG1500

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 CAG1500
   
Problem Resolution
No display  after replacing batteries Install fresh AA size Duracell® or Energizer® alkaline batteries with proper polarity
(+ and -)!
Display will not change Peel protective plastic label from display.
Display blurred and unreadable Peel protective plastic label from display.
Press the small white HW RESET button on the circuit board. 
Time alternates with Room temp This is normal operation which cannot be changed.
Blank or fading display If the thermostat is battery powered only, replace its  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 white HW RESET button on the circuit board. 
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.
Displays wrong room temperature. See Temperature Regulation 
Thermostat is locked or cannot adjust display Press the NEXT button three times then press the HOLD button once, this key sequence locks and unlocks your thermostat.
You want to change the displayed temperature scale from °F to °C or from °C to °F A jumper comprised of two small pins on the units circuit board and a black shorting device control the CAG1500 displayed temperature scale. Place the shorting device over both pins to use  the Fahrenheit scale and over only one pin (either one) to use the Celsius scale. Press the small white HW RESET button on the circuit board.
You want to change clock format from 12Hr Standard Time to 24Hr Military Time or from 24Hr Military to 12Hr Standard Time A jumper comprised of two small pins on the units circuit board and a black shorting device control the CAG1500 displayed time format. 12Hr or 24Hr military time may be selected. Place the shorting device over both pins to use 12Hr time and over only one pin (either one) to use 24Hr time. Press the small white HW RESET button on the circuit board.
Displays wrong day or time Rotate the Speed Dial® to SET DAY/TIME. The day will flash, use UP key to correct day. Press NEXT.  The time will flash. Use UP and DOWN keys to go to correct time. Rotate dial back to RUN.
Displays no set temperature The system switch must be in the HEAT or COOL position. Then if no program temperature is visible, press the small white HW RESET button inside on the rear of the circuit board.
Shows "888" on display Press the small white HW RESET button inside on the rear of the circuit board.
Shows "OL" on display "OL" means Out of Limits. The sensor is reading outside the thermostats display limit of 32°F to 95°F. When the temperature returns to within these limits the temperature display will reappear. If actual room temp is not outside these limits, there may be a malfunction. Press the small white HW RESET button on the circuit board.
Shows "OVERRIDE" on display "Override" appears on the display when the set temp is raised or lowered from the program temperature. Overrides are terminated at the next scheduled program period when the unit will revert to the program temperature and the "Override" indicator will be extinguished.
Display will not light Some display backlights are difficult to see in a lighted room. Check the backlight in a darkened area.
If the thermostat has batteries installed, replace them with fresh Duracell® or Energizer® alkaline batteries.
Clean the contacts holding the batteries in place with a pencil eraser.
For further assistance: Contact your HVAC service company or our Technical Assistance Line if not resolved.
 
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