My wifes '93 850 130k/mi developed a problem where the heater blower works only on high and will not shut off. Also, the led lights for the "A/C off" and the "Rec" do not work nor do that function (if the A/C button is toggled the ac doen't start). After leaving the car at an independent shop for three days. They said it was the ECC and that the whole unit (controls and all) needed replaced. I am not aware of any fault codes and I'm confident that my wife would have told me about them if they were present. According to the shop the part costs $700. I'm wondering if anyone else had a problem similar in nature to this one? Another Q is does anyone know where I can purchase this part at signaficiantly less than $700? Since the independent shop charged me a rate of $65per/hr to diagnose the problem, I'm attempting to locate and replace the unit myself.

--john