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Lisa FisherAug 11, 2025
Why does my ViewSonic PJ656D Projector say 'CHECK THE AIR FLOW'?
- BBrian MeadowsAug 11, 2025
If your ViewSonic Projector displays a 'CHECK THE AIR FLOW' message, it means the internal temperature is rising. Turn off the projector and let it cool down for at least 20 minutes. Then, check for any blockage of the air passage, ensure the air filter isn't dirty, and confirm the surrounding temperature is below 35°C. If the problem persists, set the FAN SPEED in the SERVICE item of the OPTION menu to HIGH.








