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If the air quality stays at 0% or the red ring doesn’t change even after extended use, it could indicate a sensor or performance issue. In that case, for warranty assistance or to check replacement options, please contact the SharkNinja Customer Service team at 1-855-427-5127, available Monday to Friday from 9 a.m. to 9 p.m. ET and Saturday from 9 a.m. to 6 p.m. ET.
Sorry, there was a problem. Please try again later.called customer service and they texted me possible solutions and they said to gently blow air on air sensor in back of machine and problem was solved
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