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Replace The Batteries - Honeywell CT3200 Installation And Programming Instructions

Weekday/weekend (5-day/2-day) programmable heat and/or cool low voltage (20 to 30 vac) thermostat and mounting plate
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Switch
Setting Result
System
Cool
The thermostat controls your air conditioning system.
Off
Both the heating and air conditioning systems are off.
Heat
The thermostat controls your heating system.

Replace the batteries

As the batteries run low, your thermostat shows the following in the digital display:
If you see:
Batteries are: You should:
Flashing "bAt Lo"
Low
Steady "bAt Lo"
Almost dead
Blank display
Dead
a.
Make sure that the System switch is set in the OFF position.
b.
Open the battery door.
c.
Press on the left side of the batteries to remove them.
d.
Install the new batteries.
Make sure that the positive and negative terminals are oriented correctly as marked inside the battery case.
Note: If you insert the new batteries within 20–30 seconds of removing the old ones, you will not have to reprogram
the thermostat. However, if the display is blank, the batteries are dead or incorrectly installed and you will have to
reprogram. See page 12 to begin reprogramming.
e.
Close the battery door and set the System switch to HEAT or COOL.
Note: If "bAt Lo" continues to display after replacing the batteries, set the System switch to OFF, insert the batteries
backwards, wait for five to ten seconds, and return the batteries to their correct orientation. Then see page 12 to begin
reprogramming.
IMPORTANT: Replace the batteries once a year to prevent the heating/cooling system from shutting down due to lack of
battery power in the thermostat. If you are leaving home for longer than a month, change the batteries before leaving to
prevent the system from shutting down due to lack of power.
18
OPERATION
Replace the batteries as soon as possible, within the month.
Replace the batteries immediately. Your heating/cooling system is not operating.
Replace the batteries immediately. Your heating/cooling system is not operating.
69-0653-6

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