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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
Heat pump issues cool
air in heat mode, or
warm air in cool mode
Heating or cooling
system does not
respond
Heating system is
running in cool mode
Heating and cooling
equipment are running
at the same time
69-2715EF—07
• 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 9).
• Check Function 1: System Type to make sure it is set to match your
heating and cooling equipment (see page 31).
• Check Function 3: Heating Fan Control to make sure it is set to match
your heating equipment (see page 31).
• Compressor protection feature is engaged. Wait 5 minutes for the
system to restart safely, without damage to the compressor.
• Check Function 2: Heat Pump Changeover Valve to make sure it is
properly configured for your system (see page 31).
System
• Press
to set system to Heat. Make sure the temperature is set
higher than the Inside temperature.
• Press
System
to set system to Cool. Make sure the temperature is set
lower than the Inside temperature.
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
• Wait 5 minutes for the system to respond.
• Check Function 1: System Type to make sure it is set to match your
heating and cooling equipment (see page 31).
• Check Function 1: System Type to make sure it is set to match your
heating and cooling equipment (see page 31).
• Grasp and pull thermostat away from wallplate. Check to make sure
bare wires are not touching each other.
• Check thermostat wiring is correct.
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