Question about 2003 Mercury Grand Marquis

1 Answer

Need advise air works all the time but comes out

Need advise air works all the time but comes out vent ,then switches to defroster& floor ---help

Posted by on

  • yadayada
    yadayada May 11, 2010

    more detailed and clear info on this problem, for a faster answer use the Live Chat option.

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Mercury Master
  • 2,007 Answers

Check for vacuum leaks under your hood. You probably have a loose, broken or damaged vacuum line. Be sure to check the one that goes to your vacuum pot as well. With your engine running, wiggle as many hoses around as you can see, and listen for a hissing sound.

Posted on Jun 17, 2009

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
chuck943
  • 783 Answers

SOURCE: Vent control

You have a vacuum leak.Defrost is the default postion(no vacuum).
See if you can locate the small black vacuum line that goes inside the vehicle on the passenger side near the heater core. The trace it back,should see it going to a canister then to the intake manifold.Make sure it is not disconnected or broken somewhere.

Posted on Mar 02, 2009

  • 37 Answers

SOURCE: PROBLEM WHEN SELECTING THE DIRECTION FOR THE AIR

Sounds like you have a supply vacuum problem. When you lose supply vacuum to the control head it defaults to defrost.

Posted on Mar 13, 2009

  • 150 Answers

SOURCE: AIR FLOW STUCK IN DEFORST VENT WILL NOT SWITCH TO FLOOR OR AC VEN

The "MODE" door works off of an electric motor.

Posted on May 08, 2009

  • 1 Answer

SOURCE: Dash vents will not blow air. Defroster and floor vents blow fine.

Is it a new vehicle? I had a new vehicle that had the same problem. Answer was that the holes weren't punched out of the vent.

Posted on May 23, 2009

alicantecoli
  • 22156 Answers

SOURCE: a/c and heater only blow air out of defrost

either a vacumn pipe is broken or the ends split so its not passing a vacumn to open the flaps,where they are and how to get to them i cant help because i have never worked on one as they are not here in spain.check the engine end first though .Look for some small rubber pipes running from the inlet manifold

Posted on May 30, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

On my 2005 Ford Taurus the air conditioning is coming out the defrost vents.


There is a flapper or trap door in the dash board that diverts air flow to various vents, defrost, floor, face, etc. If that stops working it will get stuck in the default position which is usually the defrost vents.

If you have a vacuum operated system you can check the vacuum hose for the system in the engine compartment for integrity. If that is ok then you have to get to the vacuum switch in the dashboard and probably replace it due to leaking vacuum - labor intensive and not cheap.

Any time the dashboard has to be removed you are in trouble money wise.

Aug 31, 2015 | Ford Cars & Trucks

1 Answer

AC is only blowing through the defrost vents in the dashboard?


I think your problem is the head unit that selects where the air comes out ie. Face, floor, defrost, or hi-level face and floor. If that's not working then it will not let you switch location that you want the air to come out.

Jul 26, 2012 | 2003 Chevrolet Tahoe

1 Answer

Heat & air in our 06 Dodge Caravan won't blow out at the floor


unfortunatly yes the vent arm must be brokin and probaly is the cable going to it most of them u can access that by taking the cover where vent turn is located and just have a boo and see if its off or not

Dec 08, 2009 | 2006 Dodge Caravan

1 Answer

This car has the automatic temperature control system


The hot/cold switch is probably bad.you have a blend door box that opens to let the cold air in and closes to let the hot air in.From what you are saying this part is no responding to the switch movement.Make sure power is at the switch and power should go through the switch when put on cold air this moves the blend door.Some times the blend door goes bad and has to be replaced its under the dash on the right side.

Aug 10, 2009 | 1999 Mercury Grand Marquis

1 Answer

A/C blows from defrost and floor vents, nothing from dash vents.


the switch where you turn it to blowing at your head is probably out. you will need to replace the switch control where your defrost, foot, head etc. what make, model, year is your vehicle?

Jul 09, 2009 | 1994 Toyota Camry

3 Answers

AC will not come out the dash vents all the time. Can lower the fan speed really low and they will sometimes switch back to the dash. All air is coming out the defrost vent.


my ac vent only comes out of the defroster and the floor i replaced the vent door accuator but that didnt work what could be the problem 2004 gand marquise

Jun 21, 2009 | 2004 Mercury Grand Marquis

1 Answer

Problem with air not coming out of vents.


Check for a vacum leak from the engine to the a/c.The color of the hose is black. Also check if the heater control valve hose is unplugged. If you have vacuum the it sounds like the door for the vent/floor/defrost is broken.

Jun 08, 2009 | 2004 Ford Ranger

2 Answers

Blower motor vent selection switch not working


the hvac selector switch in the dash may be the problem.You need to remove the switch and look at the connector on the back of switch,see if there are any burnt wires at the connector or switch.It's all electronic and the switches have been known to burn out on this and other model.

May 26, 2009 | 1998 Buick LeSabre

Not finding what you are looking for?
2003 Mercury Grand Marquis Logo

Related Topics:

147 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

fordexpert

Level 3 Expert

5520 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Are you a Mercury Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...