Troubleshooting - Honeywell TH8320WF Installation Instructions Manual

Troubleshooting

If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is
blank
"Wait" appears
on the screen
Button on
lower right of
screen is blank
Red light is on
Heating or
cooling system
does not
respond
Heating system
is running in
cool mode
Automation and Control Systems
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
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• 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.
• Make sure C wire is connected.
• Compressor protection feature is engaged. Wait 5 minutes for the system to
restart safely, without damage to the compressor.
• This button will remain blank unless the furnace filter change reminder is
activated.
• If thermostat is in Emergency Heat mode the red light is normal. It shows
that the thermostat is in emergency heat mode.
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
• If "Wait" is displayed, the compressor protection timer is on. Wait 5 minutes
for the system to restart safely, without damaging the compressor.
• Check Function 0170: System Type to make sure it is set to match your
heating and cooling equipment (see page 4).