Thermostat User's Manual
TH8320ZW1000
19
69-2485EFS—03
ENGLISH
In case of difficulty
Heating or 
cooling system 
does not respond
• PressSYSTEM to set system to Heat. Make sure the temperature is set 
higher than the Inside temperature.
• PressSYSTEM to set system to Cool. Make sure the temperature is set 
lower than the Inside temperature.
• Checkcircuitbreakerandresetifnecessary.
• Makesurepowerswitchatheating&coolingsystemison.
• Makesurefurnacedoorisclosedsecurely.
• If“Wait”isdisplayed,thecompressorprotectiontimerison.Wait
5 minutes for the system to restart safely, without damaging the 
compressor.
Display shows 
Fan Auto and On 
or Auto and Circ 
at the same time
• Thisisnormaloperation.Autoindicatesthethermostatisfollowingthe
programmedfansetting.IfAutoandOnisshown,thefanisscheduled
for“On”duringthisperiod(seepage7).










