Electric actuator for a heating, ventilation and/or air conditioning system

A heating, ventilation and/or air conditioning (HVAC) system for a motor vehicle, the HVAC system comprising:

• at least one air circulation duct;
• a movable flap configured to control an air flow in the at least one air circulation duct;
• and
• an electric actuator which rotates the flap mounted on a shaft, wherein the electric actuator comprises:
• an electric motor comprising:
• a stator,
• a rotor extending along an axis, and
• a pinion rigidly connected to the rotor, and
• a drive mechanism comprising:
• a planet carrier,
• at least one planet gear held by the planet carrier, wherein the at least one planet gear is rotated by the pinion;
• an output ring gear rotated by the at least one planet gear;
• and
• a drive socket comprising a recess with a base, wherein the drive socket:
• is rigidly connected to the output ring gear, drives the flap and
• wherein an axial clearance along the axis exists between an exterior face of the base and the pinion.