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and cannot rotate freely. This is typically caused by a buildup of hair, fluff, or dirt. How to Fix the E4 Error
The vacuum thinks it is drowning. It has shut down to protect its internal electronics.
Unlike generic error codes on appliances (which usually mean "overheating" or "low battery"), the E4 error on the Philips SpeedPro Max is very specific. According to the official Philips service manuals and user reports,
If the error persists after thorough cleaning, there may be a faulty motor broken drive belt