I have a 2008 mercury marquis. The EATC system fan stays on high all the time, even when the unit is turn off. Sometimes air will blow out the dash vents. What is my problem, and how can I fix this.
chet
Big Daddy
I have a 2008 mercury marquis. The EATC system fan stays on high all the time, even when the unit is turn off. Sometimes air will blow out the dash vents. What is my problem, and how can I fix this.
chet
Weißbirke Plünderer
prolly o rings need changed
http://mercurymarauder.net/forums/sh...ad.php?t=80673
2004 SB Ported Trilogy 48
Has supporting mods and stuff
Thanks to Marty O for his help in updating this car.
R.I.P.
Rex "SC Cheesehead"
Big Daddy
Will o rings fix the problem, I don't understand.
Weißbirke Plünderer
it's a vacuum system and when the o rings dry rot they leak causing issues as these. common problem. read this thread as well. You need silicon o rings metric 007
http://mercurymarauder.net/forums/sh...ad.php?t=36922
2004 SB Ported Trilogy 48
Has supporting mods and stuff
Thanks to Marty O for his help in updating this car.
R.I.P.
Rex "SC Cheesehead"
Weißbirke Plünderer
The staying on high could be the blower motor resistor, BCM, the coming out the dash vents is likely the o rings, so you prolly have two issues.
2004 SB Ported Trilogy 48
Has supporting mods and stuff
Thanks to Marty O for his help in updating this car.
R.I.P.
Rex "SC Cheesehead"
Weißbirke Plünderer
here is more on the BCM and staying on high speed.
http://www.crownvic.net/ubbthreads/u...Number=2841446
2004 SB Ported Trilogy 48
Has supporting mods and stuff
Thanks to Marty O for his help in updating this car.
R.I.P.
Rex "SC Cheesehead"
Everything Marauder, LEDs & HI
OP you have two problems.
1 - air coming out of the wrong vents is most likely bad o-rings in the EATC.
2 - fan stays on high could be either the BCM or the EATC control board.
“When you can’t make them see the light, make them feel the heat.”
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is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."
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“Be polite, be professional, but have a plan to kill everybody you meet.”
"I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
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GAME OVER, YOU LOSE!
Fix the O-rings first and see if the blower speed goes back to normal before digging into the BCM
73 is the best number.
O-rings have nothing to do with fan speed.
The Blackbird
Trilogy #61
Driveway Queen
The Spruce Goose
2004 Grand Marquis LS Limited Edition
Daily Driver
GAME OVER, YOU LOSE!
On our way to MV14 the O-rings in Ms.D's car finally crapped out and the car couldn't figure out where to send air. Vents, dash, floor, combos. In the Auto setting it would blast the fan and constantly redirect the air. I had Russ swap the O-rings out and now it works fine. Never touched the BCM. Just advising the OP to tackle the O-rings first and see what happens.Originally Posted by RF Overlord
CAMaraudin' in Virginia
On our way to MV14 the O-rings in Ms.D's car finally crapped out and the car couldn't figure out where to send air. Vents, dash, floor, combos. In the Auto setting it would blast the fan and constantly redirect the air. I had Russ swap the O-rings out and now it works fine. Never touched the BCM. Just advising the OP to tackle the O-rings first and see what happens.
For me, the indicator was that the A/C would divert to defrost under acceleration. I could hear the switchover as soon as I put a load on the engine. Russ did the O-ring fix for me on Sunday in the parking lot of MV9 in Hershey.
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I remember that. Those were Ms.D's rings, but at the time her EATC was working fine. Russ did my Black car that day too.
73 is the best number.
Wow...that's bizarre...or "bzah" as we say in Boston.
The only thing I can think of is that by disassembling the guts something was disturbed in the head unit that corrected whatever was causing the fan issue.
The Blackbird
Trilogy #61
Driveway Queen
The Spruce Goose
2004 Grand Marquis LS Limited Edition
Daily Driver
Everything Marauder, LEDs & HI
Not really.............. If there is a vacuum leak, like the o-rings, the system will go into fail-safe mode, defrost, heat and max fan.
“When you can’t make them see the light, make them feel the heat.”
Ronald Regan
"The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."
Lt. Colonel Ralph Peters
“Be polite, be professional, but have a plan to kill everybody you meet.”
"I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
General James Mattis
73 is the best number.
I thought fail-safe mode only meant it would direct all the air to the defroster, not that it would turn on the fan. I learned something here today...
The Blackbird
Trilogy #61
Driveway Queen
The Spruce Goose
2004 Grand Marquis LS Limited Edition
Daily Driver
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