Re: Heated seats question
This fix is only for non-ventilated seats.
Regarding ventilated seats, I had my SRT's front heaters replaced and that helped marginally. Brought them up to the Overland temp. Rented a GMC Denali last week with heated and ventilated seats and it's 3 temp range heater was no better. I suspect the ventilation option adds enough of a air gap that the old days of using the heaters for back therapy are over.
2014 Grand Cherokee SRT
2014 Grand Cherokee Overland Hemi
1996 Viper GTS