Coway Air Purifier Error Code 2: How to Fix It
Easy 10-20 minutes Medium Severity
Verified June 2026
- Error Code
- 2
- Brand
- Coway
- Product Type
- air_purifier
- Severity
- Medium
- DIY Difficulty
- Easy
- Estimated Fix Time
- 10-20 minutes
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Tools You'll Need
- Smartphone with Coway app
- WiFi network password
How to Fix Error Code 2
-
Restart Your Router and Air Purifier
-
Move Purifier Closer to Router
-
Reconnect via the Coway App
Make sure your phone is connected to the same 2.4 GHz network you want the purifier to use. -
Reset the WiFi Module
This will erase any previous network settings. -
Check for Router Compatibility
Changing router settings may affect other devices. Consult your router manual.
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When to Call a Professional
If the error persists after trying all steps, the internal WiFi module may be faulty. Contact Coway customer support or a certified technician for replacement.Frequently Asked Questions
Why does my Coway air purifier keep showing error code 2?
Error code 2 appears when the purifier loses connection to your WiFi network. This can happen after a router restart, internet outage, or if the purifier is moved too far from the router.
How do I reset the WiFi on my Coway air purifier?
Press and hold the 'WiFi' and 'Fan Speed' buttons simultaneously for 10 seconds. The WiFi icon will blink rapidly to confirm the reset.
Does Coway air purifier work with 5 GHz WiFi?
No, Coway air purifiers only support 2.4 GHz WiFi networks. You must connect them to a 2.4 GHz band.
Can I use my Coway air purifier without WiFi?
Yes, the purifier will still operate manually using the buttons on the unit. Error code 2 only affects smart features like remote control and scheduling.
How do I find my WiFi network password?
Check the sticker on your router, use your router's admin page, or look in your phone's WiFi settings (usually under 'Saved Networks').