COWAY AIRMEGA 400 Air Quality Light Staying Red
| CONF | DIAGNOSIS | PART MATCH | ACTION |
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92%
CONF
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Pollution Sensor Assembly (PM2.5)
The AQI light is controlled by an optoelectronic sensor that measures particulate density via light scattering. If the internal sensor chamber becomes contaminated with a layer of fine dust or if the internal IR emitter fails, the photodiode registers a constant high-voltage signal. This feedback loop is interpreted by the main PCB as high-density pollution, locking the display light in the red spectrum.
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VIEW ON AMAZON
#CommissionsEarned
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8%
CONF
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Secondary Circuit / Wiring Check
Inspect wiring harness.
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VIEW ON AMAZON
#CommissionsEarned
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DIY Repair Guide
Watch exactly how to replace the Pollution Sensor Assembly (PM2.5).