Musty smell when AC is on

Subject: Re: Musty smell when AC is on Fri Jul 04, 2008 12:09 pm

albertj-thanks for posting all the info you do. It helps me to learn about the Riv. clap

Bert:tavis:
_________________
99 Riviera(on the left)
"Cruising Missile"
BoneStockBeauty

70GS455(on the right)
Diplomat Blue
"Howitzer with windshield wipers"

Subject: Re: Musty smell when AC is on Tue Jul 08, 2008 9:43 pm

Pulled the passenger seat and lifted the carpet on that side only to find out it's only the rear carpet behind the seat that is wet. I can't see where it would be coming in! Anyone else have any ideas?

Subject: Re: Musty smell when AC is on Mon Jul 21, 2008 3:34 pm

Did you pull the rear seat yet to eliminate that as source?

Might be coming in past the passenger door weatherstripping - close up the pass. side and have a buddy pour water on around the windows and door on that side with a hose while you sit inside and try to find leak.

Or close a strip of copy paper in the door (in the weatherstrip not the latch) and see if it pulls out too easy.

Subject: Re: Musty smell when AC is on Mon Jul 21, 2008 7:43 pm

I pulled the passenger seat lifted up the carpet and confirmed that it was not the ac drain up front like it was before. I really can't see where it could be coming in other than the small rear window. I't been dry for a awhile so I am at a loss. I can't seem to figure this one out.

Subject: Re: Musty smell when AC is on Tue Jul 22, 2008 8:53 am

My guess would be door weatherstrips. If you use an automatic car wash, or a pressure washer, or even a strong garden hose it is not unusual for the water jets to force water past the door/window weatherstrips. The water runs down the strip and puddles in the rear footwells.

Unless somebody spilled some water back there and did not tell you (after allit's only water...)

When you pulled up the carpet did you find water stains or clinging insulaton near the rear quarter panel? Maybe the water's coming for the wheel well? just a guess...

...or (weak joke coming) maybe a passenger had an accident riding with you the last time you did 75 mph off that freeway exit with the hairpin turn at the end (JK)?

Again you pulled the *passenger* seat. I'm asking did you pull the back seat? (actually, I pull mine once a year anyway to check the battery for corrosion/leaks). There is probably no problem, but if there is a problem the sooner you find out the better off you are.

Albertj

Subject: Re: Musty smell when AC is on Tue Jul 22, 2008 9:15 pm

Yes, I pulled the passenger seat and the rear seat.

Subject: Re: Musty smell when AC is on Thu Jul 24, 2008 12:07 am

I'm out of ideas. If I were you I'd check the door weatherstrip.

Albertj

Subject: Re: Musty smell when AC is on Fri Aug 01, 2008 8:57 am

Last night I sprayed water from the outside spigot into the AC evap drain on the firewall 3 times and now it seems to drain very well. I think that it just must have been dirty inside the hvac/evap case not letting the ac condensate to drian. Hopefully this will take care of any further musty spells? I still need to buy a can of the odor gone spray, remove the heater control module and blast away at the evap coil. thumbsup

Subject: Re: Musty smell when AC is on Fri Aug 01, 2008 9:56 am

you could use a garden sprayer to squirt an 'odo-ban' solution into the evap drain. The enzymes in odo-ban will process the organic matter causing the smell.

Albertj