can someone help me with the following, when i got my new car i could alter the drivers side haeting temp and it would do the same to the passenger side, then the 1st time my other half got in she changed her side now you have to change both independently, does any one know how i get it back to being just me that controls both as im in the car on my own most of the time i just want to turn my nob and both are the same, hope i have explained myself right, cheers.