Seat heater malfunction: driver side

[Bisimoto]

Greetings all,
Last week, I turned my heated seat function on as I drove to the gym in my '01 S, and then after a few minutes, that cold morning, it went off: the switch that is. When I attempt to activate it, it flashes red, once, then goes off. My passenger seat works well.

I tried a search, but could not find any info. Any thoughts, or experience? The fuses are all ok. Thanks in advance.