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For Technical Assistance Call: 800-824-3005, www.leviton.com
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SYMPTOM
ACTION TO TAKE
Thermostat Dead
1. Check power to the thermostat
2. Check wiring diagrams
SYMPTOM
ACTION TO TAKE
Heat Or Cool Inoperative
1. Check for break in W or Y wire
2. Allow minimum off time to pass
3. Check HVAC Settings for correct settings
SYMPTOM
ACTION TO TAKE
Temperature Reading
Incorrect
1. Allow 30 minutes for thermostat to adjust
2. Adjust calibration offset
3. Change display option ˚F or ˚C
After installation, allow the thermostat up to 30 minutes for an accurate temperature reading.
SYMPTOM
ACTION TO TAKE
Display Problem
1. Cycle power to the thermostat (RC and RH)
SYMPTOM
ACTION TO TAKE
Aux Heat On Too Often
1. Heat Pump is not able to meet load due to cold weather
SYMPTOM
ACTION TO TAKE
Heat Pump Heats In Cool
Mode & Cools In Heat Mode
1. The setting for the Reversing Valve is incorrect - Reverse the setting
for Reversing Valve (Cool or Heat)
SYMPTOM
ACTION TO TAKE
Thermostat display momentarily
goes blank when making a call
for heating or cooling
1. Thermostat is resetting because of insufficient power. Connect common
wire or install 30A00 Power Supply Module will resolve the problem
TROUBLESHOOTING TIPS