Cleaning The Air Intake Filter - Navien NPE-210A Operation Manual

4.5 Cleaning the Air Intake Filter

If the air intake filter becomes clogged by dust or lint, the water
heater will cease to operate and "Error Code 110" will appear on
the front panel display. To properly maintain the water heater, you
should clean the air intake filter every 3-4 months.
To clean the air intake filter:
1. Press the Power button on the front panel to turn off the water
heater.
2. Disconnect the power supply to the water heater.
3. Remove the front cover of the water heater.
4. Remove the screw that secures the air intake filter (the filter is
located at the top left of the water heater).
5. Pull the filter out of the water heater.
6. Remove the filter from the plastic assembly and clean it with a
toothbrush and clean running water.
7. Allow the filter to dry completely.
8. Reinsert the filter into the plastic assembly.
9. Place the filter assembly back into the water heater and secure
it with the screw.
10. Replace the front cover.
11. Reconnect the power supply to the water heater.
12. Press the Power button on the front panel to turn on the water
heater.
Maintaining the Water Heater 13