my 93 has the electronic climate control. the blower blows out all the vents but there is no hot or cold. heater core is OK, A/C did work for 2 days once after i changed it over to 134. pulled code 1,2. thats temp door motor circuit. where is this tempersture door and how do i fix this problem? this is the last thing to do on my Vette. dont get me stated on all ive done so far-youd think i was nuts!