1998 Tc Blend Door Replacement

[jissle]

have anyone ever replaced the blend door actuator and if so how did u do it and also how many blend doors are there so i can narrow it down to find out exactly which one is broken so i dont have to keep spending money please help

[Towncar]

There are several "doors", but only one Blend Door. Therefor, only one Actuator is going to be replaced.

Here's two Tech Articles written by folks while they were doing the job.. these are older Town Cars, but the process is the same.

1997 Town Car
1990-1994 Town Car
Courtesy of LincolnsOnline

[junk yard doggie]

Hello

It's deep in behind the dash on the passenger side on top of the heater box. Steve sent some good links with pictures, that white box is it. I don't remember having to remove the entire dash to get to it. Good luck

Mike

I've got two of them form a 93 TC $14.99 plus shipping, Part #
e mail me if interested [email protected]
F3VH-19E616-AA.

[jase386]

would a blend door actuator cause the following :

AC runs until cabin reaches set temp. then the air warms up and fan slows for quiet operation as usual. as the cabin heats up further from driving or sunlight, the fan speeds up; however no air blows out.

ive checked to see where the air is going, but its not coming from the defrost, the panel, or the floor vents. but the fan is running on high.

once i turn the car off for a few mins and restart, it all starts over like normal

[Towncar]

Well, that doesn't sound like a Blend Door problem..... Did you get a "Blend Door...." error when you ran the diagnostics?

Sounds more like this one:

o Improper/Erratic Direction of Air Flow from Outlet

Possible Source(s):

• No vacuum to the A/C control.
• A/C control leaks vacuum.
• Airflow door binding or stuck.
• Vacuum hose, kinked or pinched.
• Vacuum control motor.
• A/C vacuum check valve.
• A/C vacuum reservoir tank and bracket.
• Vacuum actuator arm not connected to the door crank.

Action(s) to take:
GO to «Pinpoint Test C».

Each one of the following tests branches off into great detail, for example C1 details Blower On High, Hit Defrost, Hit Vent, Hit Floor, Etc.. each step ends in Go or No Go, and another branch.
Do you have this manual?

Sorry, just had an afterthought.. Re-reading what you said about there's no problem at start-up.... got me thinking there could be a vacuum leak somewhere. I wonder if this problem occurs under a high vacuum situation such as deceleration down a freeway hill Are there any other problems like the Power Brake working strangely?

PINPOINT TEST C: IMPROPER OR ERRATIC DIRECTION OF AIR FLOW FROM OUTLET
C1: CHECK THE SYSTEM AIR FLOW
C2: CHECK FOR A DISCONNECTED SUPPLY HOSE
C3: CHECK FOR VACUUM AT THE POWER BRAKE BOOSTER HOSE
C4: CHECK THE VACUUM SUPPLY HOSE FOR BLOCKAGE
C5: CHECK FOR VACUUM AT THE PLENUM HARNESS CONNECTOR
C6: CHECK THE VACUUM SYSTEM
C7: CHECK THE PLENUM VACUUM HARNESS FOR BLOCKAGE
C8: CHECK THE A/C VACUUM CHECK VALVE FOR BLOCKAGE
C9: CHECK THE BRAKE BOOSTER FOR LEAKAGE
C10: CHECK THE AUTOMATIC PARKING BRAKE RELEASE FOR LEAKAGE
C11: CHECK THE VACUUM RESERVOIR TANK FOR LEAKAGE
C12: CHECK THE VACUUM HARNESS FOR LEAKAGE
C13: CHECK THE CONTROL ASSEMBLY FOR LEAKAGE
C14: TEST THE VACUUM HARNESS FOR A LEAK
C15: CHECK THE EATC VACUUM HARNESS FOR BLOCKAGE
C16: EVALUATE THE SYSTEM AIR FLOW
C17: ISOLATE THE LEAKING VACUUM CIRCUIT
C18: REVIEW THE VEHICLE'S HISTORY
C19: CHECK THE VACUUM HARNESS
C20: CHECK THE A/C VACUUM CIRCUIT
C21: CHECK THE VACUUM MOTOR HOSES
C22: LEAK TEST THE VACUUM CHECK VALVE
C23: CHECK THE VACUUM CIRCUIT CONNECTIONS
C24: CHECK THE PLENUM HOSES
C25: CHECK THE VACUUM CONTROL MOTOR
C26: CHECK THE VACUUM CONTROL MOTOR INSTALLATION

[jase386]

mine is an 89. forgot to mention that.

just assumed everyone knew haha

[junk yard doggie]

O yes first generation car, a lot of us guys have the second generation. I am not that famaliar with the older ones. The oldest I have owned is the 91. I might still have some old shop manuals, I'll look and see if I can find any other helpfull info.

Mike

[Towncar]

Originally Posted by jase386

mine is an 89. forgot to mention that.

just assumed everyone knew haha

1989 !!

You did create the title of this thread.... go ahead, have another look, what's it say? Yep, 1998!!

Anyway, thanks for the exercise I'm sticking (no pun intended) to my suspicion of a Vacuum problem. Like Mike, I'm not sure where your steel cables end and Vacuum controls begin.

You don't hear any faint hissing from Vacuum being lost? Also, Way back when, there used to be a large coffee can under the hood used as a vacuum reservoir for these controls.... just an idea...

[Bearfoot]

Originally Posted by Towncar

1989 !!

You did create the title of this thread.... go ahead, have another look, what's it say? Yep, 1998!!

Anyway, thanks for the exercise I'm sticking (no pun intended) to my suspicion of a Vacuum problem. Like Mike, I'm not sure where your steel cables end and Vacuum controls begin.

You don't hear any faint hissing from Vacuum being lost? Also, Way back when, there used to be a large coffee can under the hood used as a vacuum reservoir for these controls.... just an idea...

Steven,
jissle started this thread for a 1998. jase386 broke into the thread with a question about a 1989. We're talking to two different people here, about two different cars!

Stan

[Towncar]

Originally Posted by Bearfoot

Steven,
jissle started this thread for a 1998. jase386 broke into the thread with a question about a 1989. We're talking to two different people here, about two different cars!

Stan

OH, NOW I SEE THE LIGHT !! Thanks Stan

How come these guys don't have normal names like Towncar, Junk Yard Doggie, or Bearfoot

BTW: Then What Happened To jissle ?

[junk yard doggie]

Ha Ha, to many names starting with J. I didn't catch that one either.

Mike