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Is there a little book symbol on your climate control screen where is displays the temp.
That means you have faults stored in the climate control system. Most likely for you r blend door motor since you are having a problem with your heat distribution. This requires replacement of the motors and dash dissambly you would be looking around atleast $1000 for this repair. As far as the seat heater you probably have a bad seat element if the switch and everything lights up probably around $500. An upholstery shop will have to replace that for you. To get a new remote key it will cost about $200