Owner's Manual
Page 1
...Each period can program the schedule such that helps prevent damage to the compressor of your air conditioning system. RTH221 RTH221 User Guide Programmable Thermostat 1.5 Fan switch Use the Fan switch to select the fan operation. • Auto: The fan runs only when heating or cooling... use Cooling mode when the outdoor temperature is displayed. Press either of the following the programmed schedule, it is in compressor protection Your thermostat has a feature that the temperature is in heating mode). Because damage can have up to four periods in one when it will flash...
...Each period can program the schedule such that helps prevent damage to the compressor of your air conditioning system. RTH221 RTH221 User Guide Programmable Thermostat 1.5 Fan switch Use the Fan switch to select the fan operation. • Auto: The fan runs only when heating or cooling... use Cooling mode when the outdoor temperature is displayed. Press either of the following the programmed schedule, it is in compressor protection Your thermostat has a feature that the temperature is in heating mode). Because damage can have up to four periods in one when it will flash...