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Old 04-04-2010, 06:12 PM
rmorit01's Avatar
rmorit01 rmorit01 is offline
Master Mechanic
Join Date: Nov 13, 2004
Location: Marshfield, WI
Posts: 1,001
How do you remove the underdash AC unit?

I tore out my carpet in my 79 Cherokee...the floors are rusted through and the air vents are even rusted through the base on the passenger side. So much debris it is the consistency of a mud/soil in there.

To get to the screws on that vent...I needed to drop the AC is so bad in there that I want to simply remove the AC unit (it doesn't cool now any way...however, where do you disconnect the hoses going into it?

That AC may be more trouble than it is worth...

Can you just cut the the two lines to the unit? Can you repair them in the future?

79 Cherokee S
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Old 04-04-2010, 07:30 PM
leostevo's Avatar
leostevo leostevo is offline
Grease Monkey
Join Date: Jan 27, 2009
Location: Okaloosa County, FL
Posts: 322
From my limitted knowledge of ACs - Don't just start wrenching!!

Some of the lines are under pressure and can hurt you. Also the refridgerant is superbad stuff. Just run by an AC shop and have them drain the system. After it is properly drained and the refridgerant is properly disposed of or reused, then you can just yank it all.

Don't start cutting, take it out properly and I am sure you could get some coin for it.
1990 Grand Wagoneer "Daddy Wagon"


Edelbrock Performer Intake, Headers, Cam, 1406 Carb, Mallory HEI. No smog. Rusty's 4" all springs. '89 GW wheels, custom painted and wrapped in Maxxis Big Horn 31x10.50, dual 2.25" exhaust outside the frame rails.
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Old 04-04-2010, 07:47 PM
rmorit01's Avatar
rmorit01 rmorit01 is offline
Master Mechanic
Join Date: Nov 13, 2004
Location: Marshfield, WI
Posts: 1,001
Thanks for the advice...

I know there is a quick disconnect on the passenger fender but I am trying to figure out the other connection and where it goes and where it disconnects.

Basically need to understand what the other point of disconnect is and then I can pull the hoses through the firewall.

Thanks -- Bob
79 Cherokee S
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Old 04-04-2010, 07:54 PM
KaiserMan's Avatar
KaiserMan KaiserMan is offline
I got the Willys....
Join Date: Jun 21, 2005
Location: Huntington, Ma.
Posts: 8,652
Bob, there should be some fittings under that glob of ? in your pic. There was on the under dsah unit I just bought (though it is an older one).
Thomas Russell
1975 Chevy K20 8400lb GVW Camper Special
1971 Gladiator
J2000 Platform-Stake Dump 350/T18

1970 Gladiator J3000 3407Z Camper Truck 350/T18
1968 Gladiator J3000 3406Z 160" wheel base DRW 350/T18
1963 Gladiator J300 Townside 350/TH400

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Old 04-06-2010, 08:19 PM
70FSJ 70FSJ is offline
Join Date: Mar 05, 2009
Posts: 14

Hi Bob,
Even though you might think that the system has no pressure in it or any refridgerant still in the hoses....take it to an AC/Radiator shop and have them do the disconnect/drain.

I knew a guy who just started disconnecting things... started with the low pressure side...turned out there was a clog that kept the high pressure side charged.

Needless to say, a hospital trip because of the lung burns (chemical burns) and two surgery's later to fix his eye...a heck of a price to pay for a $50 mistake.

Heed the warning about that R-12. It's really bad stuff for you!

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