Need help?Do you have a question about the Honeywell RTHL221 series and is the answer not in the manual?
General| Model | RTHL221 Series |
|---|---|
| Type | Non-Programmable Thermostat |
| Power Source | Battery |
| Stages | 1 Heat / 1 Cool |
| Backlight | No |
| Programmable | No |
| Hold Feature | Yes |
| Filter Change Alert | No |
| Temperature Range | 40°F to 90°F |
| Display | LCD |
| Compatibility | Single Stage Heating and Cooling Systems |
| Battery | 2 AA batteries |
Lists key features of the thermostat, such as backlit display and one-touch access.
Explains the functions of the Heat, Off, and Cool system switch.
Explains the Auto and On settings for the fan switch.
Shows when the setpoint temperature is displayed.
Displays the current day and time.
Indicates the active program period (Wake, Leave, Return, Sleep).
Shows if the cooling or heating system is on.
Alerts the user when batteries are low.
Explains ambient temperature and how to view setpoint.
Steps to set the current clock time using the SET button and arrow keys.
Steps to select the current day of the week.
How to save the settings and exit the time/day setting mode.
Explains the Cool, Off, and Heat settings for system control.
Explains the Auto and On settings for the fan and their behavior.
Set time and temperature for the morning wake period.
Set time and temperature for when leaving home.
Set time and temperature for returning home in the evening.
Set time and temperature for overnight sleep.
Displays default heating and cooling temperatures for wake, leave, return, and sleep periods.
Steps to set the wake time and temperature for weekdays.
Steps to set leave, return, and sleep times/temps for weekdays.
Steps to set times and temperatures for Saturday and Sunday.
Steps to set wake time and temperature for all days.
Steps to set leave, return, and sleep times/temps for all days.
How to change the temperature temporarily until the next scheduled period.
How to cancel a temporary temperature setting and resume the program schedule.
How to set a constant temperature, overriding the program schedule.
How to cancel the 'Hold' setting and resume the program schedule.
Explains the feature that prevents compressor damage by delaying restarts.
Instructions for installing fresh AAA batteries when 'Lo Batt' appears.
Recommends replacing batteries annually or before extended absences.
Notes that most settings are stored, but clock/day need resetting.
Warning to turn the system switch to Off before battery removal.
Provides website and phone number for customer support.
Advises noting model number and date code before calling.
Steps for a blank display, checking furnace door and batteries.
Steps for system non-response, checking settings and waiting.
Troubleshooting for temperature setting issues, checking ranges.
Indicates compressor protection is engaged.
Steps for 'Heat On' not appearing, checking switch and temperature.
Steps for 'Cool On' not appearing, checking switch and temperature.
Details the warranty period and what it covers.
Instructions on returning the product or contacting customer care.
Lists conditions not covered by warranty and liability limits.
Mentions limitation on implied warranties and state-specific rights.
Provides contact information for warranty-related inquiries.
To Next Page
