15
Symptom Remedy
No display For Hardwired Installation
Check for 24 VAC at thermostat; display is blank when 24 VAC is not present
For Battery Installation
Display is blank when batteries are drained or installed incorrectly
System fan does not come on
properly
Verify wiring is correct
Check position of gas/electric switch
Thermostat turns on and off too
frequently
Adjust temperature differential (see “Temperature Differential,” Step 3, Page 10)
Fan runs continuously Check fan On/Auto switch, ON position runs indoor fan continuously
Room temperature is not correct Verify wall hole is plugged with putty or insulation; calibrate thermostat (see
“Configuration,” Step 6, Page 12)
ROOM displays Room temperature offset is not zero (see “Configuration,” Step 6, Page 12)
Status indicator Green light – Cooling operation
Red light – Heating operating
Status indicator option ON (see “Configuration,” Step 9, Page 12)
filter displays Fan run time has exceeded filter check time set in configuration (see
“Configuration,” Step 8, Page 12)
To reset counter to zero and clear filter warning, press the and button
simultaneously for 5 seconds
displays Low battery indicator displays when batteries need to be replaced. Use only fresh
“AA” alkaline batteries
Problem not listed above Press the Reset button once; display will be refreshed and anti-short cycle timing
will be reset to zero
Troubleshooting
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