Question about 1997 Mercury Mountaineer

7 Answers

1997 mountaineer no heat

How can i get a diagram map on taking dashboard out of 1997 mercury mountaineer to get to door that switches cold to hot to get heat out of my vehicle? n e 1 know where on net i can find diagram free97 mercury mountaineer 5.0 engine AWD---i have no heat,,,i've flushed the whole coolant sys,heater core,radiator,engine,each independently;;;;changed the thermostat,control head(vac no cables),door actuator and even cut a hole in the heater core plastic box to KNOW that that door is shut.....i was told from a ford tech(?)that there was air in the cooling sys,,,he told me to jack up the rear end,remove the radiator cap and let it run for a couple of hrs,,triied it,,,still no heat,,,,,oh yea,,i also bypassed the vac controlled valve which is (or was)on one of the heater core hoses and triied covering the radiator to raise the coolant heat.....

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  • carpenterdon Mar 04, 2009

    the actuator and door does work.sometimes i do get some heat

  • carpenterdon Mar 04, 2009

    I KNEW IT!!!!!!!!!it only made sense to me that it should have been the FRONT that was jacked up:) :),,,,,i did try the front but not for long,,,i'll try it again,,,,thank u very much

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7 Answers

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  • Mercury Master
  • 19,396 Answers

Try also bypassing the door and the actruator, and see if the heating stays on in this way.

Posted on Mar 04, 2009

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  • Expert
  • 149 Answers

To start off since you have gone throgh all that trouble I would change the Heater coil first before trying to figur out the jumbled mess with the cables and all. To access the heater coil just crawl under the dash and remove the retaining screws. Next you need to make sure that you have a bucket in the vehicle. When you remove the heater core you are going to have to thave something to catch the fluid. Remove the old heater core and install a new one. This could be one of the two remaining problems. The other problem is your water pump. My first question on this is have you noticed you water temperature guage? Does it get higher than usual. It sould usually be about mid way to closer to the cold side. If it higher than that then I would say you have a bad water pump. Remember it is the coolant that runs through the system that allows you to get heat.

Posted on Mar 04, 2009

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  • Mercury Master
  • 4,369 Answers

I can send whatever you need. But, if you are trying to purge an air bubble, you have to raise the FRONT of the vehicle, not the rear. You need to have the radiator cap above the highest water passage in the cylinder head. To purge air bubble, fill radiator and reservoir bottle, leave radiator cap loose. run engine until temp gauge reads normal and upper rad hose is hot telling you thermsotat opened. shut off engine, top off radiator, close radiator cap. top off reservoir.

Now check to see if both heater hoses going into the firewall to the heater core are hot. If yes, coolant is flowing through heater core.
Plugged Heater Core
Check to make sure the engine coolant is at the proper level, then start the engine and let it run until it is warmed to operating temperature. Turn on the heater, feel the inlet and outlet heater water hoses (18472) connected to the heater core. If the inlet heater water hose is hot and outlet heater water hose is cooler, the heater core may be plugged.
---------------------------------------------------------------
Temperature Control
The temperature of the incoming air is controlled by the middle switch in the control head. This switch controls the position of the blend air door inside the air plenum chamber. The incoming air is directed through or around the heater core by the position of the blend air door, raising or lowering the temperature
--------------------------------------------------------------------------------------
Vacuum System
The vacuum system is the source of power for the function of the mode doors. Engine vacuum is supplied to and stored in the vacuum reservoir, which is located on top of the right frame rail behind the headlight assembly. A vacuum check valve is built into the reservoir. The vacuum is routed to the function control switch, the vacuum motors, AND THE HEATER CORE WATER CONTROL VALVE THROUGH A COLOR-CODED VACUUM HOSE HARNESS.
--------------------------------------------------------------------------------
Now check to see if temperature blend door is moving from blocking the heater core to blocking the a/c evaporator. I suspect a blend door problem, not a mode door problem.

Don't take the plenum out just yet. Report findings and we will go from there. Good luck.

Control System Outputs
The air management doors are controlled by vacuum control motors (18A318) and an A/C electronic door actuator motor (19E616). The air inlet and distribution doors are controlled by vacuum control motors.
THE TEMPERATURE BLEND DOOR IS CONTROLLED BY THE A/C ELECTRONIC DOOR ACTUATOR MOTOR. (Did you change this?)
The A/C electronic door actuator motor provides a variable number of temperature blend door positions. The temperature control position energizes the A/C electronic door actuator motor, moving the temperature blend door.

Vacuum control motors are used on both air distribution and air inlet doors. The air inlet and panel/defrost doors use a two position vacuum control motor. The floor duct/panel door uses a three position vacuum control motor. Vacuum control motors are controlled by engine vacuum through the climate control head.

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

  • Insufficient, Erratic, or No Heat
  • Coolant level.
  • GO to Pinpoint Test B .
  • Engine overheating.
  • Thermostat.
  • REFER to Section 303-03 .
  • Heater core.
  • A/C electronic door actuator motor.
  • GO to Component Test — Heater Core

Plenum Assembly
Special Service Tool(s) 1997 mountaineer no heat - svn~us~en~file=st1222a.gif~gen~ref.gif Spring Lock Coupling Tool (1/2 in)
T81P-19623-G2 Spring Lock Coupling Tool (3/4 in)
T85L-19623-A
Removal
  1. Disconnect the battery ground cable.
  1. Recover the refrigerant; refer to Section 412-00 .
  1. Disconnect the A/C cycling switch.
  1. Disconnect the electrical connectors.
    1. Disconnect the A/C blower motor (19805) electrical connector.
    1. Disconnect the A/C blower motor resistor (19A706) electrical connector.
  1. Disconnect the heater core (18476).
    1. Disconnect the heater water hoses (18472).
    1. Disconnect the heater water control valve vacuum hose.
  1. Position the speed control servo (9C735) aside.
    1. Remove the (A) bolt and disconnect the (B) servo electrical connector.
    1. Position the speed control servo aside.
  1. Remove the two nuts and the two screws from the windshield washer reservoir/coolant recovery tank. Set the tank aside.
  1. Use Spring Lock Coupling Disconnect Tool (3/4 in) to disconnect the A/C manifold and tube from the suction accumulator/drier.
  1. Use Spring Lock Coupling Disconnect Tool (1/2 in) to disconnect the condenser to evaporator tube.
  1. Disconnect the (B) A/C system vacuum harness and the (A) A/C evaporator housing mounting nut inside the vehicle.
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  1. Remove the A/C evaporator housing (19850).
    1. Remove the three underhood and one underdash nuts.
    1. Lift the A/C evaporator housing out of the vehicle.
    150dada.gif

Posted on Mar 04, 2009

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  • Mercury Master
  • 783 Answers

Well first of all he told you backwards on bleeding the system.You need to jack up the front.The radiator has to be higher than the heater core. Remove the cap then run vehicle at 2000 rpms for 2-3 minutes to try and get any bubbles out of system then top it off.
Are the hoses hot to heater core?
Here is the vacuum diagram
http://i253.photobucket.com/albums/hh43/chuck943/EVN05405.gif

The blend door motor in the middle is the one you are concerned with the postion shown in pic is for cool air,it has to move down for heat.
Let me know if you need anything else.

Posted on Mar 04, 2009

  • 3 more comments 
  • Chuck Martin
    Chuck Martin Mar 04, 2009

    Yes but mostly with the electronic actuators.

  • Chuck Martin
    Chuck Martin Mar 04, 2009


    1. Disconnect the battery cables.

    2. Disconnect the battery ground cable (14301).

    3. Disconnect the battery to starter relay cable (14300) and wait one minute for the backup power supply to be depleted.



    1. Remove the front floor console tray.



    1. Remove the steering column, refer to Section 211-04 .


    1. Disconnect the brake on/off (BOO) switch electrical connector.



    1. Lower the glove compartment door (06024).

      • Press the two glove compartment release tabs inward while pulling downward on the glove compartment door.



    1. Disconnect the blend door motor electrical connector.



    1. Disconnect the climate control vacuum connector.



    1. Disconnect the radio antenna cable.



    1. Remove the LH and RH cowl trim panels.



    1. Disconnect the electrical connectors and the ground wires on the RH cowl panel.



    1. Disconnect the power distribution box from the bracket and position aside.



    1. Remove the bulkhead wiring harness from inside the engine compartment.

      1. Loosen the three bolts.


      1. Disconnect the three electrical connectors.



    1. Pull the bulkhead electrical connector handle to disconnect the harness.




    1. WARNING: ALWAYS WEAR SAFETY GLASSES WHEN REMOVING AND HANDLING AN AIR BAG.

      WARNING: CARRY A LIVE AIR BAG WITH THE BAG AND TRIM COVER POINTED AWAY FROM YOUR BODY. AN ACCIDENTAL DEPLOYMENT WILL THEN DEPLOY WITH MINIMAL CHANCE OF INJURY.

      WARNING: PLACE A LIVE AIR BAG ON A BENCH OR OTHER SURFACE WITH THE TRIM COVER UP.
      Remove the passenger side air bag module (044A74).

      1. Remove the two screws from inside the glove compartment.


      1. Remove the passenger side air bag module.

        • Disconnect the electrical connector.



    1. Remove the floor console, refer to the procedure in this section.


    1. Remove the defrost grille.



    1. Remove the instrument panel brace bolt under the steering column.



    1. Remove the instrument panel fuse door (045D62).



    1. Remove the two instrument panel bolts on the LH side of the instrument panel (04304).



    1. Remove the instrument panel bolt on the RH side of the instrument panel.



    1. Remove the five instrument panel bolts along the top of the instrument panel.



    1. Disconnect the instrument panel to body harness.

      1. Loosen the bolt.


      1. Disconnect the harness.



    1. Remove the windshield side garnish mouldings.



    1. Remove the instrument panel.

      • If necessary, transfer components to the new instrument panel.

  • Chuck Martin
    Chuck Martin Mar 04, 2009
  • Chuck Martin
    Chuck Martin Mar 04, 2009
  • Chuck Martin
    Chuck Martin Mar 04, 2009

    I tried to get all the pics for you,I put them in a slide show and number them as they would go in the instructions.Kinda hard to follow maybe but hope it helps.

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  • Master
  • 1,011 Answers

The problem with these is the heater box cracks .there is no diagram to pulling out the dash . this is 7.5 hr mechanic book time.this is why you dont have heat the blend door wont move .You need the whole box assembly there is about 70 screws and a lot off work i have done about a dozen of these.be patient you can do this job although tough. most good shop will charge about 1200.00$thank for choosing fixya

Posted on Mar 04, 2009

  • 2 more comments 
  • mike loshbough
    mike loshbough Mar 04, 2009

    chuck have you run into this ? the box cracks and the blend door wont move!!!

  • mike loshbough
    mike loshbough Mar 04, 2009

    did you people read take out dash!!

  • mike loshbough
    mike loshbough Mar 04, 2009

    thats nice but how do you take the dash out?

  • mike loshbough
    mike loshbough Mar 04, 2009

    what ever dude im done at least i know what is wrong with your truck my living is done by working on cars for 25 years and i dont answer questions unless i know what is wrong

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  • Master
  • 740 Answers

Yo said that you had a whole cut into heater box can you feel if heater core is getting hot. If it is then there is a definite problem with hot/cold doors. when you move control from cold to hot you should hear vacuum sounds and hear doorcloseandopen. If you can hear this then the problem is NOT hot/cold door or actuator that moves them. Then your problem would bethe control that change that changes the direction of the hot/cold air flow ex face foot etc. Not if heater core is getting hot there may be no reason to remove the complete dash board just the paneling to get to heater box all actuator for these control are mounted on the outside of the heater box. Good luck and thanks for using FIX YA

Posted on Mar 04, 2009

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  • Expert
  • 173 Answers

Http://www.who-sells-it.com/cy/parts-pro-689/sport-compact-internal-engine-9770/all-pages.html

You can find in the links above the free diagram for
your 97 MERCURY MOUNTAINEER 5.0 engine

Please put ratings on me

Posted on Mar 04, 2009

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