my 2006 chevy monte carle temp gauge is reading negative numbers on 2006 Chevrolet Monte Carlo

this is the temp outside and when it reads neg , numbers my AC also stops working

Asked by for the 2006 Chevrolet Monte Carlo
Check for a bad or unplugged ambient air temp sensor. It is located behind the front grille below and to the left of the hood latch.
1 more answer
poss control head is bad