2003 Mercury Grand Marquis about six months ago the A/C would work as it should and then occasionally would start out blowing warm air and then after about 5 min. it would blow cold air. Then it became sporadic until now it blows warm air for an extended period of time and then eventually will blow cold air. What should I do to resolve the issue?
Why does my A/C blower blow vent or hot air then eventually cold air? on 2003 Mercury Grand Marquis
by bribri76 in Newport News, VA on November 24, 2013
ANSWER by pushrod on November 24, 2013
The HVAC control heads give a bunch of trouble on these vehicles. Have a mechanic with a 'mighty vac' tool check it out! That's all that is needed to find this problem.
ANSWER by globalhelper on November 25, 2013
seek diag and est from your mech