Close
QUESTIONS

RepairPal is your advocate for car care advice and guidance

Q: Why does the A/C change modes, from panel to defrost all on it's own? on 2003 Mercury Grand Marquis

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
At idle A/C blows through the panel. As I roll down the road the A/C will start blowing out the defrost all on it's own. WHY?!?!?
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
| |
loss of vac to controller. ck vac lines under hood for cracks or breaks. if there ok ck under dash if unable to find have ssmoke test done to determine leaks
Didn't find what you were looking for?