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Changing Fahrenheit (F) to Celsius (C)
The thermostat is preset to display the temperature in degrees Fahrenheit.
You may change the display readout to Celsius if desired.
1. Move the manual switch marked “F” (Fahrenheit) and “C” (Celsius)
located at the top center of the circuit board to the desired setting.
(see page 5)
2. Press RESET button located lust below the LCD display to register
the change.
The display will change to show the temperature in your desired
temperature scale. To return the thermostat to its original setting,
repeat steps 1 and 2 above.
LED Indicators
The LED indicators are used to indicate system activity. The AUX indicator
illuminates during a call for second stage heating. The auxiliary stages
are used to maintain comfort during extremes in weather conditions. If
the AUX LED is illuminated too frequently during periods of moderate
temperature, check the differential settings (page 6).
The CHECK indicator is used to monitor system status. If the CHECK
indicator is illuminated, call your local HVAC service provider.
The EMER indicator is illuminated only when the system switch is moved
to the EM, emergency heat position. The EM position is used only when
the primary stage of heat is not functioning or requires service.
Troubleshooting
Symptom Remedy
8
Thermostat does not turn
on system.
Check Wiring
(see INSTALLATION).
Check fuse. Replace with 2 amp
fuse if fuse has opened.
Thermostat turns on and
off too frequently.
Increase Temperature Differential
(see DIFFERENTIAL).
System fan does not
operate properly.
Move fan option switch to either
gas or electric, to match system
(see INSTALLATION).
Thermostat does not display
proper room temperature.
Check “F” Fahrenheit/”C” Celsius
switch located at top center of
circuit board for proper position.
If a new selection is made, press
“RESET” button located directly
below LCD display.