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#779611 - 09/10/05 01:17 AM 92 CV Blend Door
Roby2222 Offline
n00b

Registered: 12/05/04
Posts: 31
Loc: New Jersey
I think I have a bad blend door in my 92 CV, but I wanted to get some input before I rip the whole dash apart. The car has the automatic climate control and there is absolutely no heat. I tested the temperature adjustment by turning on the AC and adjusting the slider. The blows full blast when set to 65 and the AC is very cold. When set to 85 the fan slows and the compressor kicks on less and the air isn't as cold, so I think the temperature adjustment is working fine. I checked the heater core hoses from under the hood and they were good and hot, so I think the blend door is shot. What do you think? Any tips on getting to the blend door to replace it? How much of the dash do I need to take apart? I searched all of the old posts, but none were for the 92 era.

Thanks,
Roby2222
_________________________
2004 Grand Marquis LS Ultimate 22k
1992 Crown Victoria LX 138k
1994 F150 128k

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#779612 - 09/10/05 01:24 PM Re: 92 CV Blend Door
stevo Offline
Over the Hill

Registered: 05/14/03
Posts: 2738
Loc: Wisconsin--most of the time
Roby:
First thing I would do is buy either the FORD CD and see what it has to say or go out and buy a Haynes/Chilton manual. I think you can buy the CD on eBay.

You will need to get into the dash in a very personal way, that I do know.

You say you have EATC (electronic automatic temp. control). There is a procedure to do an electronic check on that module. Run another search on both the 4.6 forum and the archives with key word EATC and see what you get.

Best wishes and to CVN.
_________________________
Signature removed. See rules.

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#779613 - 09/10/05 01:50 PM Re: 92 CV Blend Door
Dextrovic Offline
Poobah

Registered: 07/17/02
Posts: 7848
Loc:  
Up to '94 on the CV/GM, the optional automatic temperature control (ATC) had no digital display...therefore no onboard diagnostics are available. EATC didn't debut on a CV/GM until '95.

What applies to '93-94s with the same ATC setup will apply to a '92.

If the blend door isn't moving, chances are that the nylon gears inside the electric blend door actuator (BDA) or the wiring to the BDA itself has failed.

The dash does not have to be completely removed to access the BDA, but it must be loosened from the firewall. Note that the BDA is visible from the glove compartment opening so the wiring to it can be inspected without removing the dash.

Hope this helps

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#779614 - 09/10/05 06:45 PM Re: 92 CV Blend Door
ExCarMagGuy Offline
Schrödinger's Cat is Dead
Over the Hill

Registered: 04/07/01
Posts: 1224
Loc: Simi Valley, California
Quote:

I think I have a bad blend door in my 92 CV, but I wanted to get some input before I rip the whole dash apart. The car has the automatic climate control and there is absolutely no heat. I tested the temperature adjustment by turning on the AC and adjusting the slider. The blows full blast when set to 65 and the AC is very cold. When set to 85 the fan slows and the compressor kicks on less and the air isn't as cold, so I think the temperature adjustment is working fine. I checked the heater core hoses from under the hood and they were good and hot, so I think the blend door is shot. What do you think? Any tips on getting to the blend door to replace it? How much of the dash do I need to take apart? I searched all of the old posts, but none were for the 92 era.

Thanks,
Roby2222




It's my understanding that the plenum design hasn't changed much between then and now.

Check http://www.p71interceptor.com/eatcswap/ for a great overview of what's involved.

Check here for pics of my plenum removed.
_________________________
'99 CV LX HPP -- Bilsteins, TC/ABS



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#779615 - 09/11/05 03:48 PM Re: 92 CV Blend Door
Roby2222 Offline
n00b

Registered: 12/05/04
Posts: 31
Loc: New Jersey
Thanks for the suggestions. I have the genuine ford shop manual, but it's a little vague regarding exactly what needs to be removed to get to the blend door. I'll try checking it out from the glove box opening and see what I can find out. I was hoping there was a way to replace the blend door actuator without taking the dash all apart. oh well. Looks like a long weekend project...

Roby2222
_________________________
2004 Grand Marquis LS Ultimate 22k
1992 Crown Victoria LX 138k
1994 F150 128k

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#779616 - 09/11/05 11:13 PM Re: 92 CV Blend Door
jjacob9105 Offline
Member

Registered: 03/18/03
Posts: 108
Loc: Los Angeles, California
When mine failed there was a clicking noise from the gears.
_________________________
97 Grand Marquis LS HPP 117xxx miles

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