Passenger seat heater won't heat on 2005 Lincoln Navigator

The passenger seat heater quit working. Any idea about what is causing it?

Asked by for the 2005 Lincoln Navigator
These devices can be a bit complicated. There will be fuses and potentially a control module involved. Have you recently spilled a beverage on the seat?

Unless you are comfortable working on the car yourself, you'll likely need some help from a professional on this.
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