Honeywell RTH2300B Thermostat Instruction Manual

Manual Honeywell RTH2300B Thermostat Instruction Manual

Honeywell RTH2300B Thermostat Instruction Manual

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Honeywell RTH2300B Thermostat

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Honeywell RTH2300B Thermostat

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Honeywell RTH2300B Instructions

Here we offer the Honeywell RTH2300B Thermostat manual completely free and in English. We have cataloged this manual in the Thermostats section on Manualverse, and it has been rated by 1 users with an average rating of 5. If you have any specific questions about Honeywell RTH2300B Thermostat, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.


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Honeywell RTH2300B Thermostat Specifications

Feature Specification
Model(s) Covered RTH2300
Compatibility Gas, oil, electric furnace; Central air conditioner; Hot water system (with/without pump); Millivolt system; Central heating and cooling system; Heat pump without auxiliary/backup heat
Incompatibility Heat pumps with auxiliary/backup heat; Multi-stage conventional systems; 120/240 Volt systems
Power Source 2 AAA alkaline batteries
Voltage 24V or 750 mV systems
Heating Temperature Range 40°F to 90°F (4.5°C to 32°C)
Cooling Temperature Range 50°F to 99°F (10°C to 37°C)
Display Type (RTH2300) Backlit LCD
Temperature Display Unit Fahrenheit (°F) or Celsius (°C) selectable
Clock Display Unit 12-hour or 24-hour selectable
Compressor Protection Built-in, 5-minute delay (selectable On/Off)
Program Schedule 4 time periods daily (Wake, Leave, Return, Sleep); separate for weekdays/weekends
Filter Reminder Yes (RTH2300 only)
Warranty 1-year limited (excluding battery)
Customer Support Phone 1-800-468-1502
Customer Support Website http://yourhome.honeywell.com

Honeywell RTH2300B Thermostat Details

The Honeywell RTH2300B thermostat is engineered for both reliability and ease of use, providing straightforward, push-button climate control. It comes pre-programmed with energy-saving settings, meaning it's often ready to go with just a few initial adjustments, primarily setting the current time and day. Its intuitive design ensures a hassle-free experience for daily operation.

A key feature of the RTH2300 model is its backlit display, which ensures clear visibility of crucial information at all times. This includes the ambient (measured) temperature, with one-touch access to view the setpoint. The display also provides system status messages, such as "Cool on" or "Heat on," and a "Lo Batt" warning that flashes 60 days before batteries are depleted, giving ample time for replacement.

For optimal energy savings, the thermostat offers a programmable schedule with four distinct time periods each day: Wake, Leave, Return, and Sleep. These periods can be customized with different settings for weekdays and weekends, allowing for precise climate control tailored to your lifestyle. Honeywell's preset energy-saving schedules are recommended, potentially reducing heating/cooling costs by as much as 33%.

Flexibility is built-in with both temporary and permanent override options. A temporary override adjusts the temperature until the next scheduled period begins, while the "Hold" feature offers a permanent override, maintaining the set temperature 24/7 until manually changed or cancelled. This ensures comfort without constantly reprogramming the schedule.

Control over your heating and cooling system is managed via the SYSTEM switch, offering "Heat," "Off," and "Cool" modes. The FAN switch allows you to select "Auto," where the fan runs only when heating or cooling is active, or "On" for continuous airflow. It's crucial to remember the caution against operating the cooling system below 50°F (10°C) to prevent potential compressor damage.

The thermostat includes a built-in compressor protection feature, which enforces a 5-minute delay before restarting the compressor. This intelligent delay prevents equipment damage that can occur from rapid cycling. During this wait time, "Cool On" (or "Heat On" for heat pumps) flashes on the display. Additionally, the RTH2300 model features a "Change Filter" reminder, which flashes when the air filter needs replacement and can be reset by holding the RUN button.

Maintenance is simple, primarily involving the replacement of two AAA alkaline batteries when the "Lo Batt" indicator appears. Most settings are stored in non-volatile memory, so only the clock and day need resetting after battery changes. During installation, the fan operation switch must be correctly set for your system type (Gas/Oil or Electric/Heat Pump), and advanced setup options are available for fine-tuning parameters like heating cycle rate, temperature unit, and clock display format.

Frequently Asked Questions (FAQs)

Can't find the answer you need? Here are some frequently asked questions about the Honeywell RTH2300B Thermostat, and we answer them below.


My thermostat display is blank.
Check if the furnace door is securely closed. Ensure two fresh AAA alkaline batteries are correctly installed.

My heating or cooling system is not responding.
Verify the SYSTEM switch is set to Heat (and temperature higher than ambient) or Cool (and temperature lower than ambient). Wait 5 minutes for the system to respond (compressor protection). Check circuit breaker and reset, and ensure heating/cooling power switches are on.

Cool On or Heat On is flashing on the display.
This indicates the built-in compressor protection is engaged. The system is waiting approximately 5 minutes before safely restarting to prevent damage. The message will stop flashing once the safe wait time has elapsed.

The temperature settings are not changing, or I can't set them outside a certain range.
Ensure the set temperatures are within the acceptable ranges: Heat: 40° to 90°F (4.5° to 32°C); Cool: 50° to 99°F (10° to 37°C).

How do I set the time and day on my RTH2300B thermostat?
Press the SET button, then use the up/down arrows (s or t) to adjust the clock time. Press SET again, then use the arrows to select the day of the week. Finally, press RUN to save and exit.

What do the Temporary and Hold functions do?
A temporary override adjusts the temperature until the next programmed time period begins. The "Hold" feature provides a permanent override, maintaining the set temperature 24 hours a day until manually changed or RUN is pressed to cancel.

When should I change the air filter, and how do I reset the reminder?
If the filter reminder is activated, "Change Filter" will flash when a replacement is due. After replacing the air filter, press and hold the RUN button for 3 seconds to reset the alert.

When should I replace the batteries in my thermostat?
Replace the batteries when "Lo Batt" flashes on the screen, which appears 60 days before the batteries are depleted. It's also recommended to replace them once a year, or if you'll be away for more than a month.

Can I use this thermostat with a heat pump that has auxiliary/backup heat?
No, the Honeywell RTH2300B is not compatible with heat pumps that have auxiliary/backup heat, nor with multi-stage conventional systems or 120/240 Volt systems. It supports heat pumps without auxiliary/backup heat.

How can I change the temperature display between Fahrenheit and Celsius?
Enter the system setup by pressing and holding both the up (s) and down (t) buttons simultaneously for approximately 5 seconds. Navigate to Function 14, then use the up/down arrows to select '0' for Fahrenheit or '1' for Celsius. Press RUN to save and exit.

Is there a way to restore the program schedule to its factory default settings?
Yes, for the RTH2300 model, you can enter the system setup (hold s and t for 5 seconds). Navigate to Function 40, then use the up/down arrows to select '1' (On) to restore defaults. Press RUN to save and exit. The default settings are energy-saving.

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