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Thread: Bought a used 04, ac blows hot air

  1. #1

    Default Bought a used 04, ac blows hot air

    So I got a good deal on an 04 Grand Marquis. Its fully decked out, runs great, looks great, but the a/c compressor looks to be dead. It had freon in it but the compressor doesn't do anything. Is there anything I should check before just assuming I need a new compressor? Any know issues on these models I should look for? Thanks in advance.

    KP

  2. #2
    BANNED! sxcpotatoes's Avatar
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    There's a leak or you need a new drier/accumulator WITH a new orifice tube thingy

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  3. #3
    Beater gonna beat sly's Avatar
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    check the high pressure and low pressure sensors. You should have over 90PSI on the low side with the system off if it really has a good charge in it.

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  4. #4
    GMN = life pantera77's Avatar
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    The receiver drier/accumulator is notorious for rotting out on 03+, see if it's leaking the alien blood.
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  5. #5

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    Ok thanks for the suggestions. I forgot to add the system is charged. I actually bled it down and added more freon. So no leaks. I'm just not getting anything from the compressor. I will take a look at the the accumulator though. Will it just look rough/rotted?


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  6. #6
    Proud Owner Of A 1987 Mercury Grand Marquis! miamibob's Avatar
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    Low pressure switch and connector to the compressor would be the first two things I'd check.


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  7. #7
    Beater gonna beat sly's Avatar
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    +1 low pressure switch. Try jumping the two wires and see if the compressor kicks on (even for a second).

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    Quote Originally Posted by gadget73
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  8. #8
    I'm an air-conditioned gypsy gadget73's Avatar
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    If its holding pressure, the accumulator hasn't blown through. SOunds more like switch issues. These also sometimes have climate control unit issues. There is a relay on the board that breaks loose and the AC quits working.

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  9. #9

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    I do have the climate controls. I'll take a look at that. Thanks


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  10. #10

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    I checked all fuses and relays. I even jumped the clutch relay and the compressor never kicks on. After looking under the car it looks as it something is wrapped in the compressor. It looks like a shoestring to me. So am I safe to ahead and buy a new compressor and change it? Is it a difficult process? Are there any good write ups I could follow?


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  11. #11
    I'm an air-conditioned gypsy gadget73's Avatar
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    See if you can get whatever it is out of the clutch assembly. Honestly if the system is charged, I might go for just replacing the clutch rather than opening up the system and having to deal with evacuation and recharging. It would be cheaper too.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  12. #12

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    Well I ended up very lucky. It ended up being the connection on the compressor itself. Just needed cleaned and put on tighter. I removed the rubber whatever that was wrapped in the clutch and charged the system and now I have cold ac. Thanks everyone who helped out.


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  13. #13
    I'm an air-conditioned gypsy gadget73's Avatar
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    Cool. Love non-involved fixes.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

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