How do I stop the air box from leaking onto my floorboards?

Tiny
ILOVEROCKNROLL007
  • MEMBER
  • 2006 BUICK RENDEZVOUS
  • 150,000 MILES
Driver's and passenger floorboards are wet. I've already unclogged the air box drain twice and it still leaks. How do I fix this?

I've already cleared the drain and it continues to leak. What do I do?

Went underneath car on passenger side behind firewall and used a wire to stick in it and also used a vacuum to suck out anything. Is there another way?

VERY sure it isn't coolant. Both passenger and driver's side are wet, no sweet smell, it's pure water. Yes, water did come out when it was first cleared and the second time it was cleared but the next day, it was leaking again.

Where is the heater/ac case located?
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Sunday, September 30th, 2012 AT 2:17 AM

10 Replies

Tiny
ASEMASTER6371
  • EXPERT
Under the dash. Very labor intensive job. Ac has to be broken down along with the cooling system. It is about an 8 hour job plus the ac evac and charge.

Roy
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Sunday, September 30th, 2012 AT 2:43 AM
Tiny
ILOVEROCKNROLL007
  • MEMBER
Lovely. Thank you so much for your help. I finally have an answer :)
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Sunday, September 30th, 2012 AT 2:44 AM
Tiny
ASEMASTER6371
  • EXPERT
Sometimes we need as much info as we can before being able to give you the correct answer. Thanks for your patience

Roy
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Sunday, September 30th, 2012 AT 2:47 AM
Tiny
ILOVEROCKNROLL007
  • MEMBER
One more question. Can I unbolt the drain and clear it that way?
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Sunday, September 30th, 2012 AT 2:59 AM
Tiny
ASEMASTER6371
  • EXPERT
You have cleared it 2 times and has not done the job. Removing the drain will allow little acess to all the debris. Keep trying if you want but I think you still may have to remove the case

Roy
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Sunday, September 30th, 2012 AT 3:09 AM
Tiny
SATURNTECH9
  • EXPERT
He is saying to take apart the ac box I have a better suggestion though. They sell a foaming ac evap cleaner you spray half the can in the ac vent wait ten mins then spray the other half of the can in the ac drain.
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Sunday, September 30th, 2012 AT 3:12 AM
Tiny
ILOVEROCKNROLL007
  • MEMBER
Thanks, i'll try anything before I have to fork over all kinds of $$$
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Sunday, September 30th, 2012 AT 3:15 AM
Tiny
SATURNTECH9
  • EXPERT
Make sure the hose on the can has a tapered tip.
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Sunday, September 30th, 2012 AT 3:58 AM
Tiny
BILHAR5
  • MEMBER
Are you sure that is where the leak is coming from, Buick Rendevous's are notorious for leaking from the Moon Roof drain.
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Sunday, January 1st, 2017 AT 3:51 AM
Tiny
KEN
  • ADMIN
Hey guys,

Pull the carpet back on the passengers side, there is a tube that transfers the water from the evaporator to the firewall that falls off and lets the water drain into the car.

Please let us know happens so it will help others.

Best, Ken
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Wednesday, January 4th, 2017 AT 12:10 PM

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