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In today's video, we'll be tackling a common issue faced by many mini-split Air conditioner/AC owners – the dreaded Mini Split Troubleshooting - error code P4 (Sophia Cooper&Hunter) In this video, we'll guide you through quickly fixing the updated 1/24/2018: Legal disclaimer added] In this Tech Tips video, Jeff explains the possible causes of
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Last Updated: May 26, 2026
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