E17 appears when using accessory hose tools; base unit works normally on floor mode.

Safety first: Unplug the cleaner before inspecting the hose connection area.

• Check hose insertion: Ensure the accessory hose is fully inserted and locked into the port. Partial insertion can prevent the detection switch from closing.
• Inspect detection mechanism: Look for a small micro-switch, magnet, or mechanical tab near the hose port. Clean away lint and debris that may prevent proper operation.
• Test the switch: With a multimeter, verify that the hose presence switch changes state when the hose is inserted. Replace the switch if it does not operate reliably.
• Examine hose end: Confirm that any molded tabs or magnets on the hose cuff are intact and not broken off.