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  #1  
Old 07-02-2009, 08:25 AM
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Expedition warm rear AC

I picked up a 2001 Eddie bower expedition last night. The front ac works great but the rear ac blows warm. I'm lost with the front and rear ac deal. what would i check or fix to get the rear ac blowing cold.
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Old 07-02-2009, 08:41 AM
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it is possible to have a restriction in the rar unit and still have front cool just fine , dont remember if they use a expansion valve or orifice tube in rear unit , just wondering if any a/c repairs have been made and they didnt flush the rear
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Old 07-02-2009, 08:58 AM
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Not real sure. i just got it last night. just like everything else I need to pick up a Chilton or Haynes for it.
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Old 07-02-2009, 09:00 AM
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find the rear evaporator and see if its cold , if it is then , may have a blend door problem and not mechanical a/c concern, if the dor isnt closing then it may be allowing heat to get in there and wont cool
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Old 07-02-2009, 09:11 AM
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Thanks Scuffy. I'll see what I can find
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Old 07-02-2009, 04:16 PM
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Rear A/C


I know it may sound silly, but be sure that the control switches are set properly. I believe that the front controls have an 'override' that may nullify the way that the temperature dial is set at the rear switch.

Not sure if the Expeditions are that way, but the E-Series vans were.

Just a thought!


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Old 07-02-2009, 04:24 PM
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Quote:
Originally Posted by SCUFFY828 View Post
find the rear evaporator and see if its cold , if it is then , may have a blend door problem and not mechanical a/c concern, if the dor isnt closing then it may be allowing heat to get in there and wont cool
I think this is what happened to my parents expo, they had the dealer fix it though.
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Old 07-03-2009, 05:30 PM
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Rear units almost always have a expansion valve and the front is an orfice tube, so when you turn off the rear the txv just closes off and stops flowing. Pretty sure low charge usually causes the rear to stop working first on those things. Best thing to do would be to take all the charge out of the system and recharge it by the weight on the label. Then you can start pulling apart the rear unit is the problem still persists.
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