Troubleshooting - Honeywell RTH6500WF Wi-Fi Series User 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
Cannot change
system setting
to Cool
Fan does
not turn on
when heat is
required
Cool On or Heat
On is flashing
on the screen
• 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 (see page 13).
• Check Function 1: System Type to make sure it is set to match your heating
and cooling equipment (see page 50).
• Check Function 3: Heating Fan Control to make sure it is set to match your
heating equipment (see page 51).
• Compressor protection feature is engaged. Wait 5 minutes for the system to
restart safely, without damage to the compressor.
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