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RTH7400/RTH7500
7 69-1899EF—02
Fan setting
Press SYSTEM & FAN, then FAN to select fan
operation:
• On: Fan is always on.
• Auto: Fan runs only when the heating or
cooling system is on.
System & Fan Schedule Clock & More
System Fan Done
System
Heat
Fan Auto
Press SYSTEM & FAN
Press FAN to select mode, then press DONE