Honeywell RTH6500WF - Troubleshooting; Display and System Setting Issues; Fan Operation and Compressor Issues

61 69-2718ES—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.
• MakesureCwireisconnected(seepage13).
Cannot change
system setting
to Cool
• CheckFunction 1: System Type to make sure it is set to match your heating
and cooling equipment (see page 50).
Fan does
not turn on
when heat is
required
• CheckFunction 3: Heating Fan Control to make sure it is set to match your
heating equipment (see page 51).
Cool On or Heat
On is flashing
on the screen
• Compressorprotectionfeatureisengaged.Wait5minutesforthesystemto
restart safely, without damage to the compressor.
Troubleshooting