2003 Grand Marquis replaced heater core, now air only blows out floor vents why?
our a/c stopped working, we were advised it was the heater core. The air was blowing fine out of all the vents. After replacing the core, we get the car back, the begins only flowing out the floor vents. Is this just a coincidence? They are now telling us they need to replace the control valve.
vacuum leak...whomever fixed it needs to do it again ..not the heater control vavle...
he told my husband the control valve box was bad....is that possible
Kelly is right!. Vacuum leak for sure, the HVAC doors are controlled by it. I suspect they forgot a connection when they put the dash back together. DO you hear any hissing? Maybe it is the control door, but they broke it when they took the dash out, so let them fix it on their dime, not yours since you already paid.
It's the the A/C door blend actuator, set incorrectly.Dismantle everything again and manually close the flap door(facing the dashboard;move to the front-right. Then place the slot on top.Just thight the 2 front bolts and rotate the selector to verify that the air comes out, in Defrost,down on Heat and thru the vents in A/C mode.Don't use the rear 2 bolts they are a pain in butt to reach.Hope this works. Peace. Love , Luis.
Looking for a Used Grand Marquis in your area?
CarGurus has 1,223 nationwide Grand Marquis listings starting at $1,799.
Search Mercury Grand Marquis Questions
Mercury Grand Marquis Experts
Related Models For Sale
Used Cars For Sale