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2000 mercury grand marquis will only blow hot air when ac is on. the ac system does work lines get cold but will not blow nothing but hot air. has climate control system. will direct air from vents to floor and defrost.

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6ya6ya
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Posted on Jan 02, 2017

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Ice maker
  • 8 Answers

SOURCE: ac blowing hot air instead of cold

Check for the following problems
(1) Check if compressor is geting power
(2) Check if system have Refrigerant in it
(3) Check if pressure switches are operational
(4) Check Thermostrat setting.
(5) Check for dirty or block condenser or evaporator

Send feed back if you solve problem

Posted on Mar 27, 2008

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  • 77 Answers

SOURCE: ac BLOWING HOT AIR INSTEAD OF COLD

Check to see if your outside unit is running. If not, check the breaker. If it is running you may have an issue with the reversing valve. It looks like three lines coming out of the top and one on the bottom. Trace the wires back to see that they are tight and secure. Of course, TURN OFF THE POWER first. good luck.

Posted on Apr 18, 2009

jumptrout51
  • 3361 Answers

SOURCE: A/C - Passenger side cold, Driver side hot

Probably a bad vacuum line not opening the damper vent.

Posted on Apr 22, 2009

roniecon
  • 6826 Answers

SOURCE: A/C blow out the floor and Defrost not the vent

there will be a vacuum under hood going to a canister(looks like a ball) that could be off or the vacuum hose is bad or bball(canister) is leaking

Posted on Jul 04, 2009

spookgfr
  • 4 Answers

SOURCE: air blowing out of defrost and vent at the same

Check the air blend door in the heater fan box.

Posted on Aug 04, 2009

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1 Answer

My heater does not blow in floor in a dodgeram 1500


the heater vacuum motor and lines needs to be checked.Also get the blend door checked.

NO HEAT ON FLOOR VENTS

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As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html


------------

No heat on Oldsmobile Silhouette?


http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

------------

Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

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Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

----------

Hot air on the driver's side vents only?

http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

--------------

Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

-----------

1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

--------------

No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html

----------

Ford F150 Ac only blows through defrost vents?

http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

----------

Dodge A/C come out of defrost vents only?

http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

---------

Ac vacuum line on dodge cummins?

http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

---------

Ford ranger AC blows cold through defrost vents instead on cabin vents?

http://technoanswers.blogspot.com/2012/01/ford-ranger-ac-blows-cold-through.html

----------

2005 Chrysler PT Cruiser: A/C Blows Warm?

http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html

-------------

2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

-----------

AC not blowing through Vents on 2007 Chevy Trailblazer?

http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html

----------

Passenger side temperature is warm air out of dash vents?

http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html

----------


These will help.

Thanks.

Nov 28, 2012 | Cars & Trucks

1 Answer

No heat from vents


As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html

------------

No heat on Oldsmobile Silhouette?


http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

------------

Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

-----------

Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

----------

Hot air on the driver's side vents only?

http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

--------------

Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

-----------

1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

--------------


No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html
----------

Ford F150 Ac only blows through defrost vents?

http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

----------

Dodge A/C come out of defrost vents only?

http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

---------

Ac vacuum line on dodge cummins?

http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

---------

Ford ranger AC blows cold through defrost vents instead on cabin vents?

http://technoanswers.blogspot.com/2012/01/ford-ranger-ac-blows-cold-through.html

----------

2005 Chrysler PT Cruiser: A/C Blows Warm?

http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html


-------------

2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

-----------

AC not blowing through Vents on 2007 Chevy Trailblazer?

http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html

----------

Passenger side temperature is warm air out of dash vents?

http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html

----------


These will help.

Thanks.

Nov 28, 2012 | 2006 Ford Taurus

2 Answers

A/C problem


Yes there is a door, and yes it could be stuck.
If one of the ac lines is cold and the other is hot, I would have someone check the blend doors under the dash.

Aug 19, 2012 | 1999 Mercury Grand Marquis

1 Answer

I have a 99 grand marquis the a/c still blows could but it only blows hot air how do I fix this problem


If the blower works but no cold air, a mechanic would check to see if the system is low on freon, then check for voltage at the low pressure switch and the ac clutch as needed.

Aug 19, 2012 | 1999 Mercury Grand Marquis

1 Answer

Ac on 96 grand marquis continues to blow hot air with new compressor and freon?


The first question is do you know if the ac compressor is running ?
If one ac line is hot and the other is cold you may have a blend door problem under the dash.

Jul 01, 2012 | 1996 Mercury Grand Marquis

1 Answer

2004 Gr Marquis, the AC blows extremely hot, the compressor works, the system is charged but no cold air, and I can contol the speed. What is wrong with my AC?


sounds like your temp door might be broken or the motor that moves it might be bad,its behind the glove box,pull the glove box down and turn the temp knob and take a look at the motor and see if it is turning,if it is, you need to have the temp door replaced,hope this helps

Oct 12, 2010 | 2000 Mercury Grand Marquis

1 Answer

2006 Merc GM, air flow out the defrost only problem.


sounds like a vacuum problem. Check vacuum lines. Maybe hooked up wrong.

Oct 04, 2009 | 2006 Mercury Grand Marquis

2 Answers

2000 Mercury Grand Marquis will only blow hot air when ac is on. The ac system does work lines get cold but will not blow nothing but hot air. Has automatic climate control system. Will direct air from...


needs re-gassing because one line should be hot (feed) and the return cold , This is a specialist job do not attempt to do it yourself because its extremely dangerous with very high pressures involved

Jun 21, 2009 | 2000 Mercury Grand Marquis

1 Answer

GRAN MARQUIS AC PROBLEM


removal of the dash is the easiest way of reparing the ac system other than the under hood parts

May 19, 2009 | 1999 Mercury Grand Marquis

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