25
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 configuration (see “Configuration Mode,” Setting 2, Page 19)
See “Fan Test” (Page 23)
Thermostat turns on and off too
frequently
Adjust temperature differential (see “Temperature Differential,” “Configuration
Mode,” Settings 5 and 6, Page 20)
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 Mode,” Setting 9, Page 21)
ROOM displays Room temperature offset is not zero (see “Configuration Mode,” Setting 9,
Page 21)
Status indicator Green light – Cooling operation
Red light – Heating operating
Status indicator option ON (see “Configuration Mode,” Setting 12, Page 21)
filter displays Fan run time has exceeded filter check time set in configuration (see
“Configuration Mode,” Setting 11, Page 21)
To reset counter to zero and clear filter warning, press the and buttons
simultaneously for 5 seconds
EH displays when button is pressed Thermostat is in Emergency Heat mode (see “Operating Modes,” Page 24)
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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