In Case Of Difficulty - Honeywell RTH1100 series Operating Manual

Table of contents

In case of difficulty

If you have difficulty with your thermostat, please try the following suggestions. Most
problems can be corrected quickly and easily.
Display is blank
is flashing
HI appears on
the screen.
LO appears on
the screen
• Make sure fresh AA alkaline batteries are correctly installed (see
page 9).
• The compressor protection timer is on. Wait 5 minutes for the system
to restart safely without damaging the compressor (see page 7).
• The ambient (measured) temperature is above 122 °F (50 °C).
• The ambient (measured) temperature is below 23 °F (-5 °C).
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RTH1100
69-2447EF—03