11
Symptom Remedy
No display Check for 24 VAC at thermostat; display is blank when 24 VAC is not present
System fan does not come on properly Verify wiring is correct, check electric heat setup in configuration (see
“Configuration Mode,” Page 19 in the Installation, Operation and Application
Guide)
Program schedule activates at the
wrong time
Check time (AM/PM) set on thermostat (see “Setting the Time,” Page 26 in
the Installation, Operation and Application Guide)
Thermostat turns on and off too
frequently
Adjust temperature differential (see “Differential,” Steps 5 and 6, Page 20 in
the Installation, Operation and Application Guide)
Thermostat does not follow program Verify it is operating in Program mode (PROG displays); check time (AM/PM)
Fan runs continuously Check fan On/Auto switch; check programmable fan setting in program;
check fan settings in configuration (see “Configuration Mode,” Page 19 in the
Installation, Operation and Application Guide)
Room temperature is not correct Verify wall hole is plugged with putty or insulation; check wiring and location
for remote sensor if used
LOC displays when any button is
pressed or thermostat buttons are
inoperative
Thermostat has the button lockout function activated (see “Lockout
Function,” Page 29 in the Installation, Operation and Application Guide)
EH shows on display Thermostat is in Emergency Heat Mode (see “Operating Modes,” Page 25 in
the Installation, Operation and Application Guide)
Very limited setpoint adjustment Thermostat has the button lockout function activated (see “Lockout
Function,” Page 29 in the Installation, Operation and Application Guide)
Check configuration mode settings 17 and 18 on Page 22 in the Installation,
Operation and Application Guide
Problem not listed above Press Reset button once*
* Reset Button Function
Time, day and mode changed to last saved settings (saved after power loss or when exiting
program setup), configuration and program settings are unchanged.
Troubleshooting
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