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Air conditioner

Tiny
ABUC55
  • MEMBER
  • DODGE RAM
The blower to my air conditioner will stop working momentarily when I accelerate and then come back on when I stop accelerating. Also, I believe it is the air conditioner that leaks in the floorboard of my truck and I need to know why that is and how to fix it. Thank you.
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Thursday, August 9th, 2007 AT 4:04 PM

6 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Does the blower motor actually stop working or does the air blow out of the defroster vent then come back to dash vents on decel? The fluid on the floor. Is it by chance coolant? If so then it is probably the heater core that is leaking
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Thursday, August 9th, 2007 AT 4:38 PM
Tiny
DPWD23
  • MECHANIC
  • 136 POSTS
If the fluid on the floor is NOT coolant, either your drain is plugged or came loose. You need to run a stiff, yet flexable wire through it to unclog it.
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Friday, August 10th, 2007 AT 6:02 PM
Tiny
ABUC55
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  • 1 POST
I checked and the air does come out of the defroster vents and back to the dash vents on decel so why is that and how do I fix it?
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Saturday, August 11th, 2007 AT 4:56 AM
Tiny
ABUC55
  • MEMBER
  • 1 POST
I don't believe that it is coolant but I can't find where the drain is located.
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Saturday, August 11th, 2007 AT 4:59 AM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
In th eengine compartment you will see the HVAC plenum, somewhere near it will be a vacuum feed line for the vents, follow it to the source. Most likely broken somewhere. While you are there look at the bottom of the plenum box, you should see an elbow coming out of the firewall, that would be the drain.
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Sunday, August 12th, 2007 AT 8:31 AM
Tiny
EVAHLE
  • MEMBER
  • 1 POST
Hi. This is a common problem that I've noticed on the internet and this forum for the Ram Trucks. It took me some time to find the actual problem.

Yes, it is a vacuum problem, but it is the check valves that are the culprit! Instead of replacing them however, just add them in series with the old ones.

They are located on the intake. Mine was next to the carb. I have a 1995 Ram 1500 V6 3.9L. The other check valve was to the Cruise Control. That fixed that as well. It used to lose speed when accelerating.

Hope this helps!
:) BTW, the check valves cost just a couple of bucks at auto stores.

Evahle
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Friday, November 2nd, 2007 AT 1:12 AM

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