E3 error

While the SUNSMAI S65-pro manual does not explicitly list an "E3" code in its basic troubleshooting table, error codes on steam vacuum mops typically indicate a mechanical obstruction or a sensor issue. Based on your description that the unit won't steam and the error persists after cleaning the brush, please try the following steps:

• Check for Internal Blockages: The E3 error often relates to a motor overload or a clog. Ensure there is no tangled hair or debris deep inside the suction hose or behind the roller brush assembly that you might have missed.
• Inspect the Water Tanks: Ensure the Dirty Water Tank is completely empty and the sensors (metal contacts) are clean and dry. If the tank is full or the sensors are dirty, the unit may trigger an error and disable steam functions.
• Perform a Self-Cleaning Cycle: Place the unit on the docking station and hold the self-cleaning button for 3 seconds. This uses high-temperature steam to flush the internal pipes and may clear a "clogged nozzle" issue which can cause steaming failures.
• Check the HEPA Filter: A heavily soiled or wet HEPA filter can restrict airflow and cause the motor to report an error. Ensure the filter is clean and completely dry.

If the E3 error persists after these steps, it may indicate a hardware fault. You should contact SUNSMAI support through your Amazon account (Orders > Order Detail > Sold by: Easylife US > Ask a question) as the product includes a 1-year protection coverage.