96 ls400 climate control doesn't work
 

my climate control unit just stopped working. The front defrost orange light just blinks but none of the buttons work. No heat, air a/c, nothing. Can I just buy another module and put it in or is it something more serious. Only thing done on the car recently is towed on flatbed and replaced fuel pump, please help, it is hot and I cant turn the a/c on.

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