Honeywell RTH7400D - Filter Timer Functionality

51 69-1726—1
Use Your Filter Timer
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.
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