Honeywell TH8320WF - Troubleshooting; Addressing Blank Display Issues; Understanding the Wait Message

40 69-2715EF—01
If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is
blank
• Checkcircuitbreakerandresetifnecessary.
• Makesurepowerswitchatheatingandcoolingsystemison.
• Makesurefurnacedoorisclosedsecurely.
“Wait” appears
on the screen
• Compressorprotectionfeatureisengaged.Wait5minutesforthesystemto
restart safely, without damage to the compressor.
Button on
lower right of
screen is blank
• Thisbuttonwillremainblankunlessthefurnacefilter,humidifierpad,orUV
bulb change reminder is activated or if an outdoor temperature sensor is
wired to your thermostat.
Red light is on • IfthermostatisinEmergencyHeatmodetheredlightisnormal.Itshows
that the thermostat is in emergency heat mode.
• IfthermostatisnotinEmergencyHeatmode,contactaqualifiedservice
contractor for repair.
Troubleshooting