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Home >> BMW >> 2000 >> 323Ci 2D Convertible, Automatic >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Central Body Electrics - Overview >> E46 Central Body Electronics >> Front Power Seats >> Optional Seat Heating (1999 M.Y.) >> Seat Heating Switch

Seat Heating Switch

Each seat push-button switch contains two LED's that correspond with the two preset temperature settings.

The switches contain temperature regulation electronics that provide 100% current flow to the seat heating element pad when first activated providing fast heat build up. Once the temperature is attained, the electronics regulates the current flow to stabilize the set temperature.

The switches provide operating current to the seat heaters until switched off. There is no preset time limit of operation.

If the battery voltage drops below 11.4 volts, the seat heating switch cuts the power supply to the heating pads but the LED's in the switch remain illuminated. The seat heating switches restore power to the heating pads when the battery voltage raises above 12.2 volts for more than five seconds.