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TROUBLESHOOTING
Problem Solution
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
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” or “AUTO”).
2. The thermostat may be in the AUTO mode. Look for “AUTO” on the LCD
display. If the Heat and Cool program temperatures are close, then the
thermostat requires a larger room temperature change before changing
from Heat or Cool.
3. There may be as much as a 4 minute delay before the Heat or Cool
system turns On – wait and check. (Compressor protection delay.)
4. Check your circuit breakers and switches to ensure there is power to the
system.
5. Replace batteries.
6. Make sure your furnace blower door is closed properly.
7. If your system only uses 4-wires, be sure the jumper wire is installed
between the RC and RH terminals.
8. Check the position of the Furnace or Heat Pump selector switch: Normal / O / B.