Coway Air Purifier Error Code 1: How to Fix It
Easy 10-15 minutes Medium Severity
Verified June 2026
- Error Code
- 1
- Brand
- Coway
- Product Type
- air_purifier
- Severity
- Medium
- DIY Difficulty
- Easy
- Estimated Fix Time
- 10-15 minutes
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Tools You'll Need
- Cotton swabs
- Soft microfiber cloth
- Vacuum cleaner with brush attachment or compressed air
How to Fix Error Code 1
-
Turn Off and Unplug
Always unplug before cleaning to avoid electric shock. -
Locate the Dust Sensor
-
Open the Sensor Cover
-
Clean the Sensor Lens
Do not touch the lens with wet or abrasive materials; it may damage the sensor. -
Clean the Sensor Chamber
-
Reassemble and Test
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When to Call a Professional
If error code 1 persists after cleaning, or if you notice other performance issues, there may be a hardware fault requiring professional diagnosis.Frequently Asked Questions
Can I use water to clean the dust sensor?
No, never use water or any liquid on the dust sensor. Use only a dry cotton swab or soft cloth to avoid damaging the sensor.
Will error code 1 affect filter life?
The error itself does not affect filter life, but if the sensor is dirty, the purifier may run inefficiently, potentially reducing filter effectiveness over time.
How often should I clean the dust sensor?
It's recommended to clean the dust sensor every 1-2 months, or more frequently if you have pets or live in a dusty environment.
What if my Coway model doesn't have a visible sensor cover?
Some models have the sensor behind a panel. Check your user manual for the exact location. If you can't find it, contact Coway support for guidance.
Can I still use my air purifier with error code 1?
Yes, the purifier will still run in manual modes, but auto mode may not function correctly. It's best to clean the sensor promptly for optimal performance.