Honeywell VisionPRO Wi-Fi TH8320WF, User Manual, Page: 41 / 144

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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