Last night coming from airport in Boston driving home had heat on 74 75 then 78 degrees was blowing cool air not hot while on highway.never done this before .then cranked it up to 80 and took a few min and started cranking hot air out. Remind I was already driving 1 hr.so car was hot.any one ever have this issue car has 30k and I checked coolant .it's not doing anymore but seeing what happened
