User Guide

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38
TROUBLESHOOTING
Scrambled or Double Display
(numbers over numbers)
No Display
Entire Display Dims
Program Does Not Change at
your Desired Setting
Auto / Fan Does Not turn On
Heating or Cooling Does Not
Go On or Off
Solution
1. Remove clear mylar sticker.
1. Check battery connections and batteries.
2. Press RESET button with a small pin and hold in for two seconds.
1. Replace Batteries.
1. Check that the time is set properly to “AM” or “PM”.
2. Check that the thermostat is not in “HOLD” or “Home Today” modes.
3. Check for the correct day setting.
1. Move HG/HE selector to opposite position
1. Check that the system selector switch is in the correct position
(“HEAT,” “COOL”).
2. There may be as much as a 4 minute delay before the Heat or Cool
system turns On - wait and check. (Compressor protection delay.)
3. Check your circuit breakers and switches to ensure there is power to
the system.
4. Replace batteries.
5. Make sure your furnace blower door is closed properly.
6. If your system only uses 4-wires, be sure the jumper wire is installed
between the RC and RH terminals.
7. Check the position of the Furnace or Heat Pump selector switch: STD - HP.
Problem
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Problem (cont.) Solution (cont.)
Erratic Display
If unit continues to operate in
the Off position
Thermostat permanently reads
“HI,” “LO,” or “ERR-” after
pressing reset button
1. Press the RESET button once with a small pin and hold for two
seconds. The thermostat will need to be re-programmed.
1. Replace unit.
1. Replace unit.
If you experience any other problems, call 888-830-1326 from 8 AM to 5 PM Central Time for technical assistance.