1997 Dodge Dakota

Tiny
JOSH_BROWNING32
  • MEMBER
  • 1997 DODGE DAKOTA
Air Conditioning problem
1997 Dodge Dakota 6 cyl Four Wheel Drive Automatic

my ac dont get cold and my whole unit only wants to come from the defrost vents
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Sunday, June 6th, 2010 AT 1:31 AM

23 Replies

Tiny
BLACKOP555
  • EXPERT
On ac setting pop the hood and feel the ac lines. Is any of them really cold?
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Sunday, June 6th, 2010 AT 1:32 PM
Tiny
JOSH_BROWNING32
  • MEMBER
Yes one line gets extremly cold
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Saturday, June 12th, 2010 AT 12:43 AM
Tiny
BLACKOP555
  • EXPERT
Well it sounds like the ac is working good. And with the dash mode door blend doors not working definetely would be checking to make sure the vaccum lines are in all good shape and properly getting vacuum
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Saturday, June 12th, 2010 AT 6:00 PM
Tiny
JOSH_BROWNING32
  • MEMBER
How would I do that?
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Saturday, June 12th, 2010 AT 6:35 PM
Tiny
JOSH_BROWNING32
  • MEMBER
All the lines under the hood is good
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Saturday, June 12th, 2010 AT 8:12 PM
Tiny
BLACKOP555
  • EXPERT
Well the vacuum lines connect to motor at the back side of the switches for the hvac system. And you can test for vaccum in and out of it. But you cant test if the blend door is working or the solenoid is shot or if the vac line is damaged inside the dash unless you strip it down
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Sunday, June 13th, 2010 AT 8:45 PM
Tiny
BLACKOP555
  • EXPERT
That is unless you want to take a vaccum pump and try to move the doors that way to see if you got blend door action
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Sunday, June 13th, 2010 AT 8:46 PM
Tiny
JOSH_BROWNING32
  • MEMBER
To get to the hvac unit I have to remove the dash right?
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Sunday, June 13th, 2010 AT 8:48 PM
Tiny
BLACKOP555
  • EXPERT
The panel that contains your fan speed, air temp and mode.
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Sunday, June 13th, 2010 AT 8:54 PM
Tiny
JOSH_BROWNING32
  • MEMBER
Iv had that out b4 and it has bout 8 diff color coded vacuum lines in it to the back on the switch but how do I get vacuum to them
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Sunday, June 13th, 2010 AT 8:56 PM
Tiny
BLACKOP555
  • EXPERT


http://www.2carpros.com/forum/automotive_pictures/66751_3_1.jpg



black line is 8inch of vaccum on those ports.

and the white is vented. each position is labled underneith
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Sunday, June 13th, 2010 AT 9:13 PM
Tiny
JOSH_BROWNING32
  • MEMBER
I just checked them and they have no vacuum
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Sunday, June 13th, 2010 AT 9:23 PM
Tiny
BLACKOP555
  • EXPERT
Do you have vaccum coming to the switch?
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Sunday, June 13th, 2010 AT 9:25 PM
Tiny
JOSH_BROWNING32
  • MEMBER
No none at all
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Sunday, June 13th, 2010 AT 9:27 PM
Tiny
BLACKOP555
  • EXPERT
Now were getting somewhere.

There should be a black vaccum line under the hood that runs from brake booster check valve or intake manifold fromt here it runs through the firewall by the heater core hoses. Check for vaccum coming to the line there. Before the checkvalve and after. If you have vaccm there the restriction or a leak in that line.
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Sunday, June 13th, 2010 AT 9:33 PM
Tiny
JOSH_BROWNING32
  • MEMBER
Ok I have vacuum at the break booster check valve b4 and after and the lines have vacuum but I still dont have it at the switch
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Sunday, June 13th, 2010 AT 9:50 PM
Tiny
BLACKOP555
  • EXPERT
So the vaccum line that goes throug the firewall. The black one. Has vaccum up to the firewall. But where it connects at the switch has 0? Must be restricted
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Sunday, June 13th, 2010 AT 9:51 PM
Tiny
JOSH_BROWNING32
  • MEMBER
Yeah should I jus follow the lines and go from there see what I find?
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Sunday, June 13th, 2010 AT 9:58 PM
Tiny
BLACKOP555
  • EXPERT
Yes or run a line from the brake booster to back of switch and everything shoudl work then youcan drill a hole in the firewal to put in new line if you want or you can pull the old one out and thread in new one. But there has to be something wrong with that line if you have vaccum up to firewal but none to switch
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Sunday, June 13th, 2010 AT 10:23 PM
Tiny
JOSH_BROWNING32
  • MEMBER
Thanks just ran the new line and it worked perfect what can u tell me about it not geting cool tho
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Sunday, June 13th, 2010 AT 11:06 PM

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