Honeywell PRO TH4000 series - In Case of Difficulty; Temperature Setting Issues; Flashing System Status Alerts; Missing Heat Status

OperatingManual
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Temperature
settings do not
change
"Cool On" Or
"Heat On" is
flashing
"Heat On" is not
displayed
"Cool On" is not
displayed
To restore
Energy Star °
default settings
Make sure heating and cooling temperatures are set to acceptable ranges:
• Heat: 40° to 90°F (4.5° to 32°C).
• Cool: 50 ° to 99°F (10° to 37°C).
• Compressor protection feature is engaged. Wait 5 minutes for the system
to restart safely, without damage to the compressor (see page 15).
• Set the System switch to Heat, and set the temperature level above the
current room temperature (see page 7).
• Set the System switch to Cool, and set the temperature level below the
current room temperature (see page 7).
Follow these steps to restore Energy Star default settings (see page 10):
1. Press SET 3 times to display "Set Schedule."
2. Press and hold SET and RUNat the same time for 4 seconds.
3. Press RUN.
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