Coway air purifiers

Problems and error codes

Coway airmega 400 filter resetThe pre-filters need cleaning. On the 400S and 400 the button also shows the pre-filter cleaning cycle in levels from 100% down to 0%.
Coway airmega 400 reset filter lightThe Max2 filters need replacing. On the 400S and 400 the button also shows the filter life in levels from 100% down to 0%.
Coway Airmega 400 no air comes out from the air outlet4 causes in the manual. First: the power plug is not connected.
Coway ap 1512hh filter resetA filter has reached its replacement cycle. The Odor LED means the deodorization filter and the HEPA LED means the True HEPA filter. While this indicator is active, the pollution level indicator does not light.
Coway AP-1512HH no air is blowing4 causes in the manual. First: the power cord is not connected.
Coway airmega ap 1512hh sensor cleaning3 causes in the manual. First: dust is on the lens of the pollution sensor.

Airmega 400
Coway Airmega 400S, 400, 300S and 300 air purifiersAlso AP-2015E, AP-2015E(SILVER_US), AP-2015F, AP-2015F(SILVER_US), AP-1515G, AP-1515H4 indicator lights, 4 problems, 4 how-tosVerified 13 November 2026
AP-1512HH
Coway Airmega Mighty AP-1512HH air purifierAlso AP-1512HH(W)2 indicator lights, 6 problems, 6 how-tosVerified 13 November 2026