Battery Replacement; Troubleshooting - Honeywell PRO3000 Series User Manual

Battery replacement

Install fresh batteries when the REPLACE
BATT warning begins flashing, once a
year, or before leaving home for more
than a month. The warning flashes
about two months before the batteries
are depleted.
Batteries provide backup power to the
display during power interruptions if
your thermostat was wired to run on AC
power when installed. All settings are
permanently stored in memory, and do
not require battery power.

Troubleshooting

If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is
blank
Heating
or cooling
system does
not respond
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is
on.
• Make sure furnace door is closed securely.
• Make sure fresh AA alkaline batteries are correctly
installed (see page 4).
• Set system switch to Heat (see page 3). Make sure the
temperature is set higher than the Inside temperature.
• Set system switch to Cool (see page 3). Make sure the
temperature is set lower than the Inside temperature.
• Wait 5 minutes for the system to respond.
Pull at
bottom to
remove
thermostat
from
wallplate.
Turn thermostat over,
insert fresh AA alkaline
batteries, then reinstall
thermostat.
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