how do I replace the BlendAire actuator on my 2004 Grand Marquis... It only blows hot air. Is it possible to move door to cold side only and block it to have cooling & no heating???


Asked by Feb 09, 2013 at 09:45 AM about the 2004 Mercury Grand Marquis LS Ultimate

Question type: Maintenance & Repair

Unit stays on hot side only and checks out to be actuator problem... Appears to be very labor intensive to replace... Would like to block it to always be on cool side as we live where heater is not needed...

5 Answers

The blend door is a function of the engine. It opens up when operating temperature is reached. It's only purpose in life is to let preheated air be used, from the stove kit on your exhaust manifold. Why this should be of concern to you, not certian. if your vehicle is taking to long to come up to operating temerature, the blend door need to be looked at. I'd concern myself with the stove kit and connecting pipe, more so than the blend door. if you've got bad heat, would look to the thermostat being stuck open first.

7 out of 7 people think this is helpful.

We are talking about Automatic Temp. Control inside vehicle. 2004 Marquis doe's not have heat stove on X manifold...

5 out of 5 people think this is helpful.

Okay then, we must ask why aren't the signals to open getting through. If you put a new one in, the same result~ if it's tubing that fell off or is cracked, inspect. If you've got a suction instrument, a turkey baster might work, to actuate manually, then inspect, you can see if this unit is bad, rather than the thing what gives it instruction.

3 out of 3 people think this is helpful.
Larry Falkenberg

10 out of 10 people think this is helpful.
David Lee

I had the same problem years ago on my 1996 Marquis...couldn't afford the dealership price so I just turned off the A/C....until...I had to change out the battery. Changing the battery made the blend door actuator cancel a code and it began to pop once in a while and so I turned on the a/ worked! Now, if I hit a bump or (it has worked for a few years in a/c only) jolt the door in some way it will turn to heat only....I just get out and take the neg off the battery for a few moments and then attach it back...the a/c will then work again!

6 out of 6 people think this is helpful.

Your Answer

Add photo

Related Questions

  • Why does my heater fan only blow cold air? 13 answers

    When I turn the heat on in my car it only blows cold air. The AC works just fine and the fan does blow at full power but no matter how long the car has been running for the air still remains extremely...

    2001 Mercury Grand Marquis


    Maintenance & Repair

  • Mercury Grand Marquis 2008 no heat in cabin 1 answer

    Checked all the basics. Hose from engine to radiator gets hot. Two smaller diameter hoses at the passenger side that are at the fire wall are hot. Switch for ac or heat ok, vaccuum door moves. Ok air ...

    2008 Mercury Grand Marquis GS


    Maintenance & Repair

  • Why does my 2005 Marquis blow high heat no matter what setting I have it on? 14 answers

    My 2005 Mercury Grand Marquis had a clicking sound with the heater blowing and then it quit but now I only get really hot air blowing out. Even when I put it on A/C, Max A/C, Vent, etc. Also, changi...

    2005 Mercury Grand Marquis


    Maintenance & Repair

  • grand marquis ac control issues 1 answer

    control unit has been replaced 5 times. then resistor is replaced ac will blow cold for 4 or 5 days then stop and only blow hot, any ideas? thanks

    2003 Mercury Grand Marquis


    Maintenance & Repair

  • Passenger side only blows heat 124 answers

    We bought a 2011 dodge caravan mainstreet used. Right away we noticed that the passenger side and the rear vents only blow heat. The driver side will blow cool air or AC, but the passenger and rear bl...

    2007 Dodge Caravan SXT


    Maintenance & Repair

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 2,557 nationwide Grand Marquis listings starting at $1,300.


Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 4,850
#2 kbro
Reputation 1,910
#3 Js08016
Reputation 1,440
View All

Related Models For Sale

Used Ford Crown Victoria"
11 Great Deals out of 1,655 listings starting at $1,950
Used Lincoln Town Car"
51 Great Deals out of 2,364 listings starting at $1,542
Used Chevrolet Impala"
934 Great Deals out of 35,696 listings starting at $1,500
Used Mercury Marauder"
51 listings starting at $7,300
Used Cadillac DeVille"
2,377 listings starting at $1,495
Used Ford F-150"
3,267 Great Deals out of 216,697 listings starting at $1,500
Used Honda Accord"
1,258 Great Deals out of 78,695 listings starting at $1,400
Used Ford Mustang"
733 Great Deals out of 41,077 listings starting at $900
Used Ford Taurus"
363 Great Deals out of 23,112 listings starting at $1,400
Used Toyota Camry"
1,590 Great Deals out of 98,367 listings starting at $895
Used Chrysler 300"
581 Great Deals out of 20,784 listings starting at $1,490
Used Chevrolet Tahoe"
1,074 Great Deals out of 36,045 listings starting at $1,700

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
5 Great Deals out of 44 listings starting at $4,995
2010 Mercury Grand Marquis For Sale
7 Great Deals out of 118 listings starting at $3,299
2009 Mercury Grand Marquis For Sale
5 Great Deals out of 135 listings starting at $2,995
2008 Mercury Grand Marquis For Sale
5 Great Deals out of 194 listings starting at $2,500
2007 Mercury Grand Marquis For Sale
11 Great Deals out of 199 listings starting at $1,993