Honeywell Standard Non-Programmable Thermostat (CT5X) Owner's Manual

5

69-1525—2

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The Fan switch settings are:
On: The fan runs continuously. Use for improved air 
circulation. (Recommended position with whole-house 
air cleaners.)
Auto: Normal setting for most homes. In cooling, the 
fan starts and stops with the cooling equipment. In 
heating, the fan is controlled directly by the heating 
equipment and starts a few minutes after the heating 
equipment turns on.

Slide the switch on the thermostat to the desired fan 
setting.

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The System switch settings control thermostat 
operation as follows:
Cool: The thermostat controls the cooling system. 
Off: Both heating and cooling are off. 
Heat: The thermostat controls the heating system.

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Slide the System switch on the thermostat to the 
desired system setting.

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Slide the System switch to Heat and the Fan switch to 
Auto.

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Press and hold the ▲ key to raise the temperature 
several degrees above the room temperature to start 
the heating equipment.

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Press the ▼ key to lower the temperature setting 
below the room temperature. The heating equipment 
should stop.

Compressor Damage Hazard.   
Operating at too low of an outdoor 
temperature can cause compressor damage.
Do not operate cooling system when outdoor 
temperature is below 50°F (10°C).

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Slide the System switch to Cool and the Fan switch to 
Auto.

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Press the▼ key to lower the temperature setting 
several degrees below the room temperature to start 
the cooling equipment.

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Press the ▲ key to raise the temperature setting 
above the room temperature. The cooling equipment 
should shut down.

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Slide the System switch to Off and the Fan switch to 
On. The fan should run continuously if the G terminal 
is connected.

The following instructions provide the information 
necessary to change the heating cycle rate to match your 
heating equipment and choose Fahrenheit (F°) or 
Celsius (°C).

To exit at any time, press ▼  key until End is displayed.

1. Enter Installer Setup

a. Slide System switch to Off position
b. Use the▼ or ▲  keys to set the temperature 

setpoint to 52°F (11°C).

2. Press the ▲ and ▼ keys simultaneously for more 

than one second to light all segments on the dis-
play and to enter installer setup mode. When the 
keys are released, a two-digit software revision 
code is displayed.

3. Press the ▲ key. Factory information is displayed. 

A typical example is shown, but information dis-
played varies by model. This information is for fac-
tory use only.

FAN

SYSTEM

Auto On

Cool Off Heat

INCREASE
SETTING

DECREASE
SETTING

SYSTEM SWITCH

FAN SWITCH

TEMPERATURE DISPLAY

M11020A

Set

Room  

M14683

M14686

M14687