Honeywell PRO TH4110B Owner's Manual page 18

Operating Manual
]if you have difficult3/with your thermostat, please try tile suggestions below. Most
problems
can lye corrected
quickly and easily:
Display is blank * Make sure fresh AA alkaline batteries are correctly installed (see page 15).
Heating or
cooling system
does net respond ,
®
e
®
®
Set system switch to Heat (see page 7). Make sure the temperature is
set higher than the inside temperature.
Set system switch to Cool (see page 7). Make sure the temperature is
set lower than the Inside temperature.
Check circuit breaker and reset if necessary.
Make sure power switch at heating & cooling system is on.
Make sure furnace door is closed securely.
Wait 5 minutes for the system to respond.
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