2000 Lincoln LSE V8

I just recently purchased this car. I love it so far. I have noticed that sometimes the air coming out of the passenger's & rear vents blows out warm/hot air when I have the A/C turned on. I can get this to stop by turning it on and off or by turning up & down the temp or hitting the recirculation button. Is this a common problem? Is there an easy fix?

commonish, other LS owners have reported it but not as a reoccuring theme - mor like it happened once or twice and went away after restarting the car (me as well).

We expect it is the blender valve - expensive to replace because most of the dash has to come out.

Thanks, I'll take note and hopefully it won't contiuously happen. Is the K&N air filter stock, or is it an add-on? Also, is there a way I can tell if my chip has been re-flashed? I read in another thread that this may need to be done to 2000 LS's to update them(better shifting)?

K&N is an add-on.

Your dealer can pull the service history of your car - if and when the PCM was reflashed.