Installation Manual

69-2738EFS—03 10
Troubleshooting
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.
Fan does
not turn on
when heat is
required
• CheckFunction 3: Heating Fan Control to make sure it is set to match the
heating equipment.
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.
Heat pump
issues cool air
in heat mode,
or warm air in
cool mode
• CheckFunction 2: Heat Pump Changeover Valve to make sure it is properly
configured for your system.
Heating system
is running in
cool mode
• CheckFunction 1: System Type to make sure it is set to match the heating
and cooling equipment.
Heating
and cooling
equipment are
running at the
same time
• CheckFunction 1: System Type to make sure it is set to match the heating
and cooling equipment.
• Graspandpullthermostatawayfromwallplate.Checktomakesurebare
wires are not touching each other.
• Checkthermostatwiringiscorrect.