failure mode
Roomba i4+ Won't dock / Recharge & Resume not finishing
Symptom: Robot fails to return to the dock, misses the contacts and doesn't charge, or during Recharge & Resume it docks but never goes back out to finish. Likely root causes: Dock in a poor spot (corner, under furniture, on carpet, too close to walls); IR docking beam blocked by furniture or strong sunlight; Charging contacts dirty (robot or dock); Dock unplugged / on a switched outlet; Battery too low or worn to navigate home / complete resume; Robot lost its place on the map (moved or picked up) so it can't resume Next steps if owner-level checks fail: Robot sees the dock but never seats on the contacts — check contact alignment/wear; if the IR receiver is suspect, contact iRobot Customer Care 1-877-855-8593