Honeywell RTH4300B Operating Manual page 19

In case of difficulty
Temperature Make sure heating and cooling temperatures are set to acceptable ranges:
settings do not
change
"Cool On" or
"Heat On" is
flashing
"Heat On" is not
displayed
"Cool On" is not
displayed
• 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 13).
•
Set the System switch to Heat, and set the temperature level above the
current room temperature (see page 6).
•
Set the System switch to Cool, and set the temperature level below the
current room temperature (see page 6).
RTH4300B Programmable Thermostat
17 69-2226EFS—05