Honeywell RTH8580WF Thermostat User Manual


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69-2715ES—01 62
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15).
Cannot change
system setting
to Cool
• CheckFunction 0170: System Type to make sure it is set to match your
heating and cooling equipment (see page 54).
Fan does
not turn on
when heat is
required
• CheckFunction 0180: Heating Fan Control to make sure it is set to
match your heating equipment (see page 55).
“Wait” appears
on the screen
• Compressorprotectionfeatureisengaged.Wait5minutesforthesystem
to restart safely, without damage to the compressor.
Troubleshooting
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