The air purifier displays c 1, and then it is turned off.

When the air purifier displays c 1, turn it off. This happens because the primary filter screen and the odor filter screen of the air purifier have been used for too long, and there are too many impurities on them, which need to be replaced. This problem can be eliminated by replacing the primary filter and odor filter of the air purifier. The specific operation steps are as follows:

1. Open the front cover.

2. Remove the primary filter.

3. Remove the odor filter.

4. Remove the outer packaging of the primary filter.

5. Remove the outer packaging of the odor filter.

6. Replace the odor filter.

7. Replace the strainer.

8. Close the cover plate, and the operation is completed.