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Discussion Starter #1
I have a 2002 deville. The ac only blows cold on the passenger side. I checked both blend door acctuators and were bad. So i then opened both doors to cold but still only the ac blows cold on the passenger. Any suggestions on the next step
 

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Discussion Starter #4
No not at all. Its ice cold up to full. But still only cold on passenger. Im lost. My whole dash is taken apart right now
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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I have a 2002 deville. The ac only blows cold on the passenger side. I checked both blend door acctuators and were bad. So i then opened both doors to cold but still only the ac blows cold on the passenger. Any suggestions on the next step
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So i then opened both doors to cold

are you sure the doors you opened were the MIX or BLEND doors?

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how do you know the refrigerant is "Its ice cold up to full"
 

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Discussion Starter #6
I mean i felt the difference in temp when i opened and closed blend door on pass side but driver side doesnt get cold only gets look warm. I know its charged also because i put a gage on it and charged till full.
 

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White Diamond '03 DHS (with DTS floor shift)
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There is an air mix door for the drivers side and one for the passengers side (dual Zone system).
driver side doesnt get cold only gets look warm
That's a symptom of low refrigerant.

I know its charged also because i put a gage on it and charged till full.
A "gauge"? As in one of those low side only gauges that come on the can of refrigerant? Those are useless. You need a good "set" of A/C gauges, with both high and low side readings. Are both the inlet and outlet A/C pipes at the firewall cold and the same temperature?
 

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Easiest way to determine if low on refrigerant on these cars is to place your hand both on the inlet and outlet of the evaporator, between the rear valve cover and firewall. Both should feel cold on a fully charged system. If the outlet is warm, you are low on refrigerant.
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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19,846 Posts
I mean i felt the difference in temp when i opened and closed blend door on pass side but driver side doesnt get cold only gets look warm. I know its charged also because i put a gage on it and charged till full.
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I know its charged also because i put a gage on it and charged till full.

the mickey-mouse gauge that you get with a can of freon are pure junk -
and don't tell you anything about your AC system -

cold on the passenger side and warmer on the drivers side
IS a symptom of low refrigerant charge -

BUT -

you need the actual pressure readings for BOTH the HIGH side and LOW side
to properly diagnose the AC system -
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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:welcome:

Start your own thread listing your exact symptoms.

If you've read through this thread, you should have a rough idea what the possibilities are.
 

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Discussion Starter #13
I have a good gauge. I tested both high and low and bothe where up to parr. But i had no clue there was a mix door. Is this the only other option?
 

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White Diamond '03 DHS (with DTS floor shift)
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Have you ever pulled the DTC's? A bad actuator should set a DTC.
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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I have a good gauge. I tested both high and low and bothe where up to parr. But i had no clue there was a mix door. Is this the only other option?
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I tested both high and low and bothe where up to parr

this means absolutely NOTHING when diagnosing an AC system -
what are the numbers for BOTH the HIGH and LOW pressure readings -
 
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