Tag: RTH221B1000 Thermostat

  • Honeywell RTH221B1000 Programmable Thermostat User Guide

    Honeywell RTH221B1000 Programmable Thermostat User Guide

    Honeywell RTH221B1000 Programmable Thermostat  Operation Controls Display screen When Cool On is flashing, this means the compressor protection is engaged(see section 1.7). Setting the clock Press the Set button. The message Set Time will appear on the screen and the time display will flash. Press the button to set the time. Press the Run button…