Ventilation Cooling Module
WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
Each cooled seat has 2 ventilation modules, one located under the seat cushion and one located in the seat back. These modules are controlled by a PWM signal from the memory seat module (MSM) and the cooled seat switch located in the center console. Each ventilation module contains a thermo-electric device (TED) and a blower motor. The TED is mounted downstream of the blower motor. Each TED consists of a circuit of positive and negative connections sandwiched between 2 ceramic plates. Each ceramic plate is equipped with copper fins for cool/heat exchange. The air flowing past these fins is either directed as cooled air into the seat cushion and seat back, or directed into the cabin as warm waste air.