“The light above the power button flashes blue periodically when the unit is off. What does this indicate?”
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Hi Zaz, thank you for bringing this to our attention. If you see the power button flashes blue, it is an indicator that you need to replace the filter. Patricia | Insignia Support https://www.bestbuy.com/site/insignia-497-sq-ft-hepa-air-purifier-with-energy-star-certification-white/6444067.p?skuId=6444067
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