How do I program the schedule on my RTH2510/RTH2410/RTH2300/RTH221 thermostat?

Locate the system Slider Switch labeled Heat Off Cool. Slide the switch to the desired setting and either manually adjust the arrows to the desired set point and press hold or establish a schedule for heating and cooling. Operation

For the 2000 family schedule:

  • Press the Set button 3 times until Set Schedule appears. The start time of the first period (Wake) of the week days (Mon-Fri) will flash.
  • Press the up or down button to set the time.
  • Press the Set button. The temperature setting for that period will flash.

To program the temperature settings for the cooling mode, place the  System switch in Cool.

To  program the temperature settings for the heating mode, place the switch in Heat.

  • Press the up or down button to set the temperature.
  • Press the Set button. The start time of the next period will flash.
  • Repeat steps 2 through 6 for each of the remaining periods.
  • Once all adjustments are made, press the Run button to save them and exit. (The changes are also saved if you do not press any button for 60 seconds.)

To skip a period (except Wake), press the Hold button for 4 sec. while that period is displayed.

To bypass the schedule press the Hold button from the main screen.

How do I set the time/date on a series 2000 thermostat?

Press the SET button, then press up or down arrows to set the clock time.
Press the SET button, then press up or down arrows to select the day of the week.
Press RUN to save & exit.

How do I bypass the schedule on the series 2000 thermostat?

Press up or down to immediately adjust the temperature. This will temporarily override the temperature setting for the current time period. “Temporary” will appear on the display and the current program period will flash. The new temperature will be used until the next period begins.

To permanently ignore the schedule, press up or down 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 either override and resume the schedule. The word Hold will disappear, and the thermostat will be set to the temperature programmed for the current period. Also ensure that the heat – off – cool switch is set to the desired run mode.

Remember, after you set the desired setpoint and select your desired hold the thermostat will change back from displaying your setpoint to the room temperature. This is normal. Allow your heating or cooling system to reach your setpoint over time.

Is the TH4210D, TH4110D, TH4110B heat pump compatible?

Yes. The TH4210D, TH4110D, TH4110B will work with a heat pump. The TH4210D will also work with a heat pump with backup.

How do I fix a blank display on my TH4210D, TH4110D, TH4110B thermostat?

If the thermostat is battery powered, check/replace your batteries. If the device is common wired, try and power it up with batteries. If that fails to power up the thermostat, you may need to involve a technician. If batteries do power up your common wired thermostat, check your breakers, furnace power switch, furnace door kill switch to insure your system is powered. If your system is fine, and the thermostat only works on batteries, you may need to involve a technician.

Why is my TH4210D, TH4110D, TH4110B showing an error message Replace Batt? What does it mean?

Replace the Battery.

How do I access the installer setup (ISU) on my TH4210D, TH4110D, TH4110B thermostat?

Instructions:

  1. To begin, press and hold the up and down buttons until the display changes.
  2. Press down to change settings.
  3. Press up to advance to next function.
  4. Press and hold down and up to exit and save settings.

For more information on the ISU, please see pages 5 and 6 in the manual.

How do I program the schedule on a TH4210D, TH4110D, TH4110B thermostat?

Make sure the thermostat is set to the system you want to program (Heat or Cool).

  1. Press SET until Set Schedule is displayed.
  2. Press up or down to set your weekday Wake time (Mon-Fri), then press SET.
  3. Press up or down to set the temperature for this time period, then press SET.
  4. Set time and temperature for the next time period (Leave). Repeat steps 2 and 3 for each weekday time period.
  5. Press SET to set weekend time periods (Sat-Sun), then press RUN to save & exit.

To cancel an unwanted time period (except Wake), press and hold up + HOLD for 4 seconds while in the Set Schedule mode.

How do I lock the screen TH4210D, TH4110D, TH4110B thermostat?

The TH4210D, TH4110D, TH4110B does not support a screen lock feature

How do I bypass the schedule on the TH4210D, TH4110D, TH4110B thermostat?

Press up or down to immediately adjust the temperature. This will temporarily override the temperature setting for the current time period.  “Temporary” will appear on the display.  The new temperature will be used until the next period begins.

To permanently ignore the schedule, press up or down 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 either override and resume the schedule. The word Hold will disappear and the thermostat will be set to the temperature programmed for the current period.

How do I adjust the screen brightness on my TH4210D, TH4110D, TH4110B thermostat?

Pressing any button will cause the screen to light up for a period of time and will dim over time if no additional buttons are pressed.

How do I remove the schedule on the TH4210D, TH4110D, TH4110B thermostat?

Press up or down to immediately adjust the temperature and then press the HOLD button. The thermostat will hold this temperature until the HOLD button is pressed again.

How do I enable auto change over on the TH4210D, TH4110D, TH4110B?

The TH4210D, TH4110D, TH4110B does not have an automatic change over feature. Select Heating, off, or cooling with the selector switch to choose the mode you desire.

How do I change between heating and cooling on the TH4210D, TH4110D, TH4110B?

Locate the selector switch on the bottom of the thermostat labeled Heating, off, Cooling. Move the selector switch to the desired mode.

Specifications

5-2-day Programmable Triac Line Volt Thermostat

Thermostat TypeProgrammable, Line Voltage
Program Modes5-2 Programmable
Display TypeLCD Screen
Warranty1 Year

Downloads

Owner’s Manual [pdf]: RLV4305 Programmable Thermostat

Owner’s Manual [pdf]: RLV4305A1014 Programmable Thermostat

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