In Case Of Difficulty - Honeywell RTH2300 Operating Manual

Operating Manual

In case of difficulty

Screen is blank.
Temperature settings cannot be
changed.
Cool On or Heat On is flashing. • The compressor protection delay is underway. Wait for the delay
HI appears on the screen.
LO appears on the screen.
E1 appears on the screen.
E2 appears on the screen.
69-2326EF—01
• Ensure two fresh AAA alkaline batteries are correctly installed.
• The System switch is off.
• You are setting the temperature outside its allowable range:
• Heat: 40°F to 90°F (4.5°C to 32°C)
• Cool: 50°F to 99°F (10°C to 37°C)
to end (maximum of 5 minutes).
• The ambient (measured) temperature is above 122°F (50°C).
• The ambient (measured) temperature is below 32°F (0°C).
• The temperature sensor circuit is opened. Replace the thermostat.
• The temperature sensor circuit is shorted. Replace the thermostat.
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