Use Your Filter Timer; Reset Filter Timer - Honeywell RTH7400D Owner's Manual

The Filter Timer notifies you when to change your furnace
filter.

Reset Filter Timer

1. "Change Filter" appears on the display when the
filter timer expires.
2. Press the Reset button to restart the filter timer.
See Step 11 to turn the Filter Timer Change
Reminder feature on or off.

Use Your Filter Timer

Tue
System Fan
Heat
Schedule
Reset
51
PM
Clock & More
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