Robot reports E19; front caster wheel area feels hot or wheel does not rotate.

Safety first: Turn off the robot.

• Remove caster: Pull the front caster wheel straight up to remove it from its socket (some models may require a screwdriver).
• Clean axle: Remove hair, threads, and debris from the wheel axle and socket.
• Check rotation: Ensure the wheel spins freely and swivels smoothly. If rough or melted, replace the Front Caster Wheel Assembly.
• Reinstall and test: Push the caster back into place until it clicks, then run a test cleaning.
• If E19 persists: The caster sensor (if equipped) or nearby wiring may be damaged, requiring internal inspection and possible sensor board replacement.