32
Troubleshooting
Symptom Remedy
No display Check for 24 VAC at thermostat; display is blank when 24 VAC is not present
Time and day of week must be reset after extended power loss
System fan does not come on properly Verify wiring is correct, check Gas/Electric Configuration (see Setting 7, Page 13)
All thermostat buttons are inoperative Verify 24 VAC is present; unit locks out when 24 VAC is not present
No response with first button press First button press activates backlight only
Program schedule activates at the wrong
time
Check time (AM/PM) set on thermostat (see Setting the Time, Page 25)
Thermostat turns on and off too
frequently
Adjust temperature differential (see Configuration Mode Setting 2, Page 11)
Thermostat does not follow program Verify it is operating in program mode (PROG displays); check time (AM/PM);
check if in 2 hour program override
Fan runs continuously Press FAN (right) button to turn fan off
Program Mode: Check programmable fan setting in program schedule
(see Page 27)
Status indicator light not on during call Turn status indicator function on (see Configuration Mode Setting 21, Page 18)
Room temperature is not correct Calibrate thermostat (see Configuration Mode Setting 15, Page 17)
If remote sensor is used, check S1 and S2 terminal connections
displays when any button is pressed Thermostat has the button lockout function activated (see Lockout Feature, Page
28 and Configuration Mode Setting 12, Page 16)
on display instead of room
temperature
Check for a bad connection at S1 and S2 terminals, if used (see Configuration
Mode Setting 17, Page 17)
Heat or Cool not coming on Verify wiring is correct, gently pull on each wire to verify there is a good
connection at terminal block
Problem not listed above Press Reset button once*
* Reset Button Function
Time and day are reset, configuration and program settings are unchanged.
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