The Honeywell RTH221B1021/A is a straightforward, one-week programmable thermostat designed to offer basic temperature control for your home. It’s ideal for users who want to optimize energy efficiency by scheduling temperature adjustments for different times of the day and week. This thermostat is compatible with heating, cooling, and heat pump systems without auxiliary heat.
The complete manual for Honeywell RTH221B1021/A is displayed below.
Table of Contents
Honeywell RTH221B1021/A
Honeywell RTH221B1021/A Specification
- Type: Programmable Thermostat
- Compatibility:
- Works with most HVAC systems, including gas, oil, and electric systems.
- Compatible with single-stage heating and cooling systems, as well as heat pumps without auxiliary heat.
- Temperature Range:
- Heating: 40°F to 90°F (4°C to 32°C)
- Cooling: 50°F to 99°F (10°C to 37°C)
- Power Source:
- Battery-powered (2 AA batteries)
- Some installations might require a C-wire (common wire) for power.
- Display:
- LCD screen with backlight
- Dimensions:
- Approximately 4.1 x 4.4 x 1.1 inches (104 x 112 x 28 mm)
- Weight:
- About 6.6 ounces (187 grams)
- Installation:
- DIY-friendly with included mounting hardware and instructions
Product Features
Programmable Scheduling:
- Daily Programming: Allows you to set up to four different periods per day (wake, leave, return, sleep).
- Weekday/Weekend Scheduling: You can set different schedules for weekdays and weekends for added flexibility.
User-Friendly Interface:
- Simple Controls: Easy-to-navigate buttons and a clear LCD screen make setting and adjusting schedules straightforward.
- Backlit Display: The screen is backlit, making it easy to read in various lighting conditions.
Energy Savings:
- Adjustable Temperature Settings: Helps manage your home’s temperature more efficiently, which can lead to energy savings.
- Program Override: Allows for temporary adjustments without altering the set schedule.
Temperature Control:
- Accuracy: Designed to provide precise temperature control to ensure comfort.
Battery Backup:
- Battery Power: Runs on 2 AA batteries, which makes it simple to install and maintain. Battery life typically lasts about a year.
Easy Installation:
- DIY Installation: Comes with clear instructions and necessary hardware for easy setup. The design is intended for users who may not have extensive technical knowledge.
Compatibility with HVAC Systems:
- Versatile: Suitable for a wide range of HVAC systems, making it a flexible choice for different home setups.
Find the products here.
Also Read : Honeywell TH3110D1008/U Manual PDF
Frequently Asked Questions (FAQs)
How to reset honeywell thermostat rth221b1021?
Turn Off: Set the thermostat to “Off.”
Remove Thermostat: Pull it off the wall plate.
Take Out Batteries: Remove the 2 AA batteries.
Wait: Leave it for 1-2 minutes.
Reinsert Batteries: Put them back in.
Reattach Thermostat: Put it back on the wall plate.
Turn On: Set to “Heat” or “Cool” and adjust the temperature
How to set honeywell thermostat rth221b?
Turn On:
Set the thermostat to “Heat” or “Cool.”
Set the Clock:
Press “Menu”, select “Clock”, and set the current time.
Program Schedule:
Press “Menu”, choose “Program” or “Schedule”, then set times and temperatures for each period.
Adjust Temperature:
Use the “Up” and “Down” arrows to set your desired temperature.
Save Settings:
Review and confirm settings by pressing “Done” or “Save”.
How to set AC thermostat Honeywell?
Turn On:
Set to “Cool” mode using the “System” button.
Adjust Temperature:
Use the “Up” and “Down” arrows to set your preferred temperature.
Set the Clock (if needed):
Press “Menu”, choose “Clock”, and set the time.
Program Schedule (if needed):
Press “Menu”, select “Schedule”, and set times and temperatures for different periods.
Save Settings:
Confirm by pressing “Done” or “Save”.
Is a Honeywell thermostat good?
Yes, Honeywell is generally considered a reliable and reputable brand for thermostats.
They offer a wide range of models to suit different needs and budgets, from basic programmable thermostats to advanced smart thermostats with Wi-Fi connectivity and voice control.
Why is my Honeywell thermostat not working?
Check Power: Replace batteries and ensure wiring is secure.
Verify Settings: Set to the correct mode and temperature.
Inspect Breaker: Reset any tripped circuit breakers.
Check HVAC: Ensure the system is on and fuses are intact.
Reset Thermostat: Turn off, wait, then turn back on or perform a factory reset.
Clean Sensors: Remove any dust or debris.
Verify Compatibility: Ensure it matches your HVAC system.
Look for Errors: Check the display for error codes.
Consult Manual: Follow troubleshooting steps in the manual.
Call a Pro: Contact an HVAC technician if needed.