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Troubleshooting - Honeywell 9000 Installation Manual

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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
"Wait" appears
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
69-2815EFS—01
• 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.
• Check that System Setup screen "Your thermostat controls" or "Your system
type" is set to match your heating and cooling equipment.
• Check that System Setup screen "Your fan control" is set to match your
heating equipment.
• Compressor protection feature is engaged. Wait 5 minutes for the system to
restart safely, without damage to the compressor.
• Check your setting for System Setup screen "Type of changeover valve" to
make sure it is properly configured for your system (see page 66).
Touch SYSTEM
to set system to Heat. Make sure the temperature is set
higher than the Inside temperature.
Touch 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 and cooling system is on.
• Make sure furnace door is closed securely.
• If "Wait" is displayed, the compressor protection timer is on. Wait 5 minutes
for the system to restart safely, without damaging the compressor.
• Check that System Setup screen "Your thermostat controls" or "Your system
type" is set to match your heating and cooling equipment .
10

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