Honeywell Rth2300b1012a Manual

Programmable Thermostat RTH2300
969-2326EF—01
Press the Run button to follow the programmed schedule. For maximum energy savings
while maintaining comfort, you can program the schedule such that the temperature is at
an economical level when you sleep or leave for work and at a comfortable level when you
are awake and at home. You can program up to four periods per day:
To program a period, you need to set its start time and its two temperature settings (one
when the thermostat is in cooling mode and...

Operating Manual
69-2326EF—0110This thermostat is preset with energy saving program settings. See the next page if you
wish to modify the settings.Energy saving settingsPeriodWeekdays Weekend
Start time Heat Cool Start time Heat Cool
Wake6:00 AM 70°F (21°C) 78°F (25.5°C) 6:00 AM 70°F (21°C) 78°F (25.5°C)
Leave8:00 AM 62°F (16.5°C) 85°F (29.5°C) 8:00 AM 62°F (16.5°C) 85°F (29.5°C)
Return6:00 PM 70°F (21°C) 78°F (25.5°C) 6:00 PM 70°F (21°C) 78°F (25.5°C)
Sleep10:00 PM 62°F (16.5°C) 82°F (27.5°C)10:00 PM...

Programmable Thermostat RTH2300
1169-2326EF—01

Press the Set button 3 times until Set Schedule appears. The Wake period is 
displayed. 
NOTE: To set another period, press the Set button as many times as needed until the
desired period and the desired days are displayed and its time or temperature is flashing.

When the time flashes, press the Up or Down button to set the time.

Press the Set button.

To set the temperature for cooling mode, first place the System switch in Cool. To 
set the...

Operating Manual
69-2326EF—0112To temporarily ignore the schedule, press the Up or
Down button until the desired temperature is displayed.
The word Te m p o r a r y will appear on the screen and the
period display will flash to indicate that the current period
has been overridden. The new temperature will be used
until the next period begins.
NOTE: Pressing the Up or Down button once will display the setpoint temperature. To
change the setpoint temperature, press either button more than once.
Press the...

Programmable Thermostat RTH2300
1369-2326EF—01
To permanently ignore the schedule, press the Up or
Down button until the desired temperature is displayed.
Then, press the Hold button to maintain the new
temperature indefinitely. The word Hold will appear on
the screen.
Press the Run button if you wish to cancel the override
and resume the schedule. The word Hold will disappear
and the thermostat will be set to the temperature
programmed for the current period.Permanent override of schedule 

Operating Manual
69-2326EF—0114Your thermostat has a feature that helps prevent damage to the compressor of your air
conditioning or heat pump system. Because damage can occur if the compressor is
restarted too soon after shutdown, this feature forces the compressor to wait 5 minutes
before restarting. During the wait time, the message Cool On or Heat On flashes on the
screen. When the safe wait time has elapsed, the message stops flashing and the
compressor turns on.Built-in compressor protection 

Programmable Thermostat RTH2300
1569-2326EF—01
Install two fresh AAA batteries when Lo Batt flashes on
the screen. Lo Batt appears for 60 days before the
batteries are depleted.
Replace batteries once a year, or when you will be away
for more than a month.
Most settings are stored in non-volatile (permanent)
memory. Only the clock and the day must be set after you
replace the batteries.Battery replacement
Set the System switch to Off before removing the batteries. Otherwise, the
heating/cooling system...

Operating Manual
69-2326EF—0116In case of difficultyScreen is blank. • Ensure two fresh AAA alkaline batteries are correctly installed.
Temperature settings cannot be 
changed.• The System switch is off.
• You are setting the temperature outside its allowable range:
• Heat: 40°F to 90°F (4.5°C to 32°C)
• Cool: 50°F to 99°F (10°C to 37°C)
Cool On or Heat On is flashing. • The compressor protection delay is underway. Wait for the delay 
to end (maximum of 5 minutes).
HI appears on the screen. • The ambient...

Programmable Thermostat RTH2300
1769-2326EF—01
For assistance with this product, please visit http://yourhome.honeywell.com.
Or call Honeywell Customer Care toll-free at 1-800-468-1502.
To save time, before calling, proceed as follows:
1)Loosen the locking screw at the bottom of the thermostat. Note that 
the screw is captive and cannot be removed from the wallplate.
2)Separate the thermostat from the wallplate as per figure on the right.
3)Note your model number and date code on the thermostat’s...

Operating Manual
69-2326EF—0118Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or
materials, under normal use and service, for a period of one (1) year from the date of purchase by the
consumer. If at any time during the warranty period the product is determined to be defective or
malfunctions, Honeywell shall repair or replace it (at Honeywell’s option).
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase, to the...