2006 Pontiac Torrent Base 6 Cyl 3.4L
a/c lines freeze up near the expansion valve and firewall.
67000 miles, had the freon checked and put back in right amount. I will drive for about 45 mins straight and it will freeze up. i can turn the ac off and just let the fan blow for about 10 mins to thaw it out but it just keeps on freezing back up.
the expansion valve is where the freon expands (goes from gaseous form to liguid form), the result of his change is cold, thats the way airconditioning works, it is normal for this pipe to freeze up. if this pipe doest freeze up , you know your air conditioner is not working.........