Passenger side heated seat, top and bottom, stopped working roughly 3 years ago. We were (and currently are) in hot climate so I never made it a priority. We will be likely moving to a cold climate and would like to get this fixed. When turning on, the passenger heated seat light stays on for 1-3 minutes then just turns off. The seat is not getting warm during this time so I am thinking the switch is fine. No Tech2 DTC codes. Is the heating element kaput?