Just bought '03 STS, trunk Stinks, auto A/C always on full - Help please!

[ktraub]

Hi all,
I just bought an '03 STS and got it home (in another state) and the trunk really smells of mildew. Can anyone provide any remedies?
Also, the Auto climate control is always on full cold (whenever A/C is enabled) no matter what the temp is set to, (below 90). Manually controlling the FAN helps, but if it's in Auto mode, it blows full COLD all the time.
Are there any DIAG codes related to the Auto climate control?
Again, any help is greatly appreciated.

[JimHare]

Hey TurboJimmy, wanna jump in on this one??? ROFLMA

Seriously, the mildew may be a result of a water leak into the trunk that caused the carpeting or other parts to really get funky. I'd try removing as many of the removable parts as I could, lay them out in the sun, and wash them down real well with something that will also help kill the smell. And you'll probably want to make sure the trunk doesn't still leak. There have been posts about suspect weatherstripping on Seville trunks that need to be replaced...search the threads...

[clusco]

Not sure about about the A/C but as for the mildew in the trunk, if you have any wetness in there at all it may be a case of your sunroof draining hose being stopped up. The hose goes from your sunroof on both sides back through the back seats and then down to each wheel well. I had mine stuck a while back too but it was overflowing into my rear floorboard. What I did (and what they tell you not to do), is I took my air compressor and cleaned out the hose. You'll have to climb in the back of the trunk and pull out the little hose that is going down to the wheel well. Get a little bucket with you because it will have a little water come out if anything is stuck in there. So grab the hose and stick the air compressor nozzle in the tubing and press intermittently to lodge any trash from the system. Again, many will tell you this can knock the hose out of the track but I did it pretty rough and it worked.

As for your A/C, you may want to reset your PCM to see if the blower controls will work after that.

[ktraub]

Thanks for the info on the Sunroof drain tubes.

How do I reset the PCM?

[davesdeville]

Disconnect the battery for a few minutes.

[Ranger]

Be carefull with compressed air in the drain tubes. If it is really plugged tight you might blow the tube off of the drain at the sun roof. You'll then have to dismantle the headliner to reconnect it. Try rodding it out with weed wacker line first.

[Deftones1331]

the water going into my trunk was running down the collumn between my back passenger side window, and the rear windshield any time it rained heavily. it soaked the back passenger seat and caused the spare tire well in my trunk to fill with water, and it made the whole trunk smell of strong mildew. i noticed that the top corner of the weatherstripping on the back windshield on that side was slightly raised... i filled the gap with clear silicone caulking, and pressed the stripping back down, and my trunk and seat have been bone dry ever since. the smell went away with a good steam cleaning, and leaving the trunk lid open overnight to dry it out.

[ktraub]

Thanks all! I really appreciate the help.

[oldgamer]

Why you need to "reset the PCM"? It's not gonna help you in anything.

[ktraub]

I was going to reset the PCM based on the previous message saying that resetting the PCM might help with the A/C always on full when on auto. That's why I wanted to know how to reset the PCM.