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2000 quest front ac don't work rear ac works great


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mmarcial617
New User

Mar 21, 2012, 4:31 PM

Post #1 of 5 (6079 views)
2000 quest front ac don't work rear ac works great Sign In

I have a 2000 quest my ac works great in the rear, but the front only blows regular air. Last summer (same problem) I took it to a shop and they said it needed to be recharged. so I did and it worked great throughout the summer. Now that the winter is over and the weather is starting to get warm here in new york I started to test the ac and same problem as last year. can anyone help me?


Hammer Time
Ultimate Carjunky / Moderator
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Mar 21, 2012, 4:50 PM

Post #2 of 5 (6037 views)
Re: 2000 quest front ac don't work rear ac works great Sign In

If the rear A/C is cold, then you are not low on refrigerant. You have an issue in the front. Feel the temp of the large pipe where it comes out of the firewall and see if it is very cold. If it is, then you probably have a problem with the temp blend air door under the dash. If it isn't cold, then you likely have a plugged up orifice tube which would also mean that the compressor is failing.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Mar 21, 2012, 6:27 PM

Post #3 of 5 (6003 views)
Re: 2000 quest front ac don't work rear ac works great Sign In

Many if not most front/rear A/C systems in MVAC will use an "O" for front and an "expansion valve" for rear which will win out being smarter at metering what bounty is available of compressed gas to liquid.

Best way to know since it worked last time is to charge to exact weight after noting pressures of front on only as a diagnostic tool/info and bet it plain works. High chance this is a slow leak to be found if - I said if compressor is quiet while engaged and that in fact you are now low on refrigerant but just messing with the charge isn't a fix. The fix is finding and fixing the leak.

Check pressures especially high side which at about 1,500 RPM should be about 2.2 X the temp in Fahrenheit of the actual air temp coming in thru the grille not the day's temp or some other place. It only cares about the temp at the vehicle. Definitely don't add anything till all info is in or charge from empty to known weight for accurate info/results and bet that works but not the fix if it was low,

T



Hammer Time
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Mar 21, 2012, 7:03 PM

Post #4 of 5 (5991 views)
Re: 2000 quest front ac don't work rear ac works great Sign In

In my experience it has been exactly the opposite effect due to the distance to the rear but by all means, try an evacuate and recharge and see what it does.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 21, 2012, 9:13 PM

Post #5 of 5 (5977 views)
Re: 2000 quest front ac don't work rear ac works great Sign In

So right Hammer - knowing it has the correct charge (not some Walmart deal) puts this in perspective. If any of this was so easy I guess anyone could just boost away till the system exploded.

Side note: March 2012. Been 88F here already - say what! This is New England but we are all loving this so far,

Tom






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