Honeywell Programmable Thermostat RTH230B Instructions

A programmable digital thermostat can help lower your home heating and cooling costs by automatically adjusting the temperature in your home according to your preferred schedule. The Honeywell programmable thermostat will use less energy for heating and cooling during periods when you're away from the house. When you're at home, the programmable thermostat will automatically adjust the temperature to your preferred comfort level. Setting and programming the thermostat is easy and can be done in just a few minutes.

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Digital programmable thermostats can reduce your home energy bill.

Step 1

Set the system operating mode by moving the selector switch to "Cool," "Heat" or "Off." Set the fan mode by moving the selector switch to "Auto" or "On." Set the system temperature by pressing the up or down arrow until the desired temperature is displayed.

Step 2

Press the "Mode" button until the house icon disappears from the display to operate the thermostat in manual mode. Press the "Mode" button until the icon for the current period is displayed to operate the thermostat in programmable mode. Press the temperature up or down button to bypass the programmed temperature for two hours.

Step 3

Press the "Clk" button once, then use the up and down arrows to set the current time in hours. Press the "Clk" button again and use the up and down arrows to set the current time in minutes. Press the "Clk" button again and use the up and down arrows to set the current day. Press the "Exit" button to leave the time and day programming menu.

Step 4

Press the "Pgm" button to enter the programming menu. Select the program days that are to be modified by pressing the "Day" button once for the Monday through Friday program, twice for the Saturday/Sunday program or hold the button for three seconds to select all seven days. Skip any periods that don't require adjustment by pressing the "Clear" button during programming.

Step 5

Set the time for the first period to start with the up and down arrows. Press the "P#" button to display the temperature setpoint for that period. Use the arrow buttons to adjust the setpoint for heating or cooling, depending on which mode the selector switch is set. Move the selector switch to the other mode and adjust the setpoint for that mode using the arrow buttons. Press the "P#" button to go to the next period. Repeat this step for all remaining periods. Press the "Exit" button to leave the programming mode when all adjustments are complete.