Error 18 — fan error on the iRobot Roomba j7 Combo

iRobot s9+ Main Brush Roller iRobot Roomba s9+ Filter iRobot Roomba s9+ Left side brush iRobot Roomba s9+ Right side brush iRobot Roomba s9+ Side brush set iRobot Roomba j7+ Filter iRobot Roomba j7+ Left side brush iRobot Roomba j7+ Right side brush iRobot Roomba j7+ Side brush set iRobot j7+ Main Brush Roller iRobot Roomba j7 Combo Filter iRobot Roomba j7 Combo Left side brush iRobot Roomba j7 Combo Right side brush iRobot Roomba j7 Combo Brush guard iRobot Roomba j7 Combo Side brush set iRobot Roomba j7 Combo Cable organizer iRobot Roomba j7 Combo Cleaning tool iRobot Roomba j7 Combo Charging cable iRobot Roomba j7 Combo Remote control iRobot Roomba j7 Combo Mop pad (4-pack) iRobot Roomba j7 Combo Dock base pad iRobot Roomba j5 Combo Filter iRobot Roomba j5 Combo Left side brush iRobot Roomba j5 Combo Right side brush iRobot j7 Combo Replacement Battery iRobot j7 Combo HEPA Filter iRobot j7 Combo Main Brush Roller iRobot j7 Combo Mop Pad iRobot j7 Combo Dust Bag iRobot j7 Combo Water Tank Filter iRobot j7 Combo Floor Cleaning Solution iRobot j7 Combo Dock Filter iRobot j5 Combo Main Brush Roller iRobot Roomba j5 Combo Side brush set iRobot Roomba j5 Combo Mop pad (4-pack) iRobot Roomba i7+ Filter iRobot Roomba i7+ Left side brush iRobot Roomba i7+ Right side brush iRobot Roomba i7+ Side brush set iRobot Roomba i8+ Filter iRobot Roomba i8+ Left side brush iRobot Roomba i8+ Right side brush iRobot Roomba i8+ Side brush set iRobot i7+ Replacement Battery iRobot i7+ Main Brush Roller iRobot i8+ Main Brush Roller iRobot Roomba i6+ Filter iRobot Roomba i6+ Left side brush iRobot Roomba i6+ Right side brush iRobot Roomba i6+ Side brush set iRobot i6+ Main Brush Roller iRobot s9+ Replacement Battery iRobot j7+ Replacement Battery iRobot j7 Combo Side Brush iRobot j5 Combo Mop Pad iRobot i8+ Replacement Battery