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What is behind this grill on my dash?


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Hi!

Can anyone tell me what this thing behind the grill (picture) is good for?

It's making a constant noise and it's getting on my nerves. If I don't really need it, how can I switch it off?

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Chris

Edited by -Chris-
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That is an interior air intake, there is a small fan in there that pulls interior air over an interior air sensor, so that the AC system can accurately know and control interior temperature

Sometimes the little fan in there can make noise, not unlike your computer fan, and it needs replacing

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Normally, I would tell you to check the junk yards in your area, but I see from your post that you're in Austria, so junked GM cars are probably not nearly as plentiful there as in North America. If the noise is really getting on your nerves, you might try shooting some silicone lubricant in through the vent while the little fan is running. It might suck enough into the motor to quiet it down, at least temporarily.

Where do I get this fan? Can I replace only the fan or do I need a complete new air intake?

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Try taking the fan out and lubing the bearings.

If you want me to check scrap yards here in New York, I can. Let me know, Ill ship it to you

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I've tried to get the whole thing out, but it didn't work.. not enought space to pull it trought :(

I also tried to spray some silicone into the fan, but nothing happend.

If I disconnect the cable.. what would happen?

@BodybyFisher

That would be very nice! I'll try to get it out and see if I can "repair" it, otherwise I'd be very happy if you could send me a "new" sensor with fan or only the fan if it can be replaced.

How much could it cost including your effort and shipping?

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If you disconnect the fan, your AC/Heat temps will be inaccurate.

Maybe someone will chime in and let us know how that fan/ sensor comes out, my guess is that it comes out from behind the light switch that is next to it

What year and model is your car, Ill check the scrap yards if you want, I can not see this part being much money, if anything at all, just the shipping

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I just managed to get it out!! I took away the cover from the side of the dashboard and with a little patience it came out. (with the backside first)

I opend the whole thing to clean the fan.. now it ain't perfect, but much better than before. Lots of dust and sticking mud inside.. Best tool for cleaning is a q-tip (one a little wet, one dry) I think.

It's a '99 Seville STS, but I think I can wait until it gets worse again, so you don't need to search the scrap yards.. thank you anyway!

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Try to get a nice drop of lube on the bearings if you can! Glad you worked it out

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I would replace the fan with one made for a computer, but I would need to check at what voltage it runs.. I would guess 12v.. so maybe a converter would be needed if i use a computer-fan.

A friend of mine made a 12 to 9 volts "changer" with some old parts from a mainboard, I think it would work.. but the noise is now acceptable. If it gets worse I'll try the lube or a replace.. if nothing works the scrap yard may have the sollution :) I didn't find this part at rockauto. But I think a new one wouldn't be too cheap.

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let me know, Ill send you one

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I am in the UK and break STS's (part them out for our American friends) and have a spare fan sensor unit. You can have it for 10 UK Pounds plus postage. Or,...you can do what has already been suggested, try and carefully clean and lube the existing fan. The fan on my graphics card in my PC makes a right old din after dust build up so every 8 months or so I have to remove the card, dismantle the heatsink/shroud over the main processor which leaves the fan visible for cleaning and lubing. In fact only just done that last week and graphics card is now silent running again.

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I am in the UK and break STS's (part them out for our American friends) and have a spare fan sensor unit. You can have it for 10 UK Pounds plus postage. Or,...you can do what has already been suggested, try and carefully clean and lube the existing fan. The fan on my graphics card in my PC makes a right old din after dust build up so every 8 months or so I have to remove the card, dismantle the heatsink/shroud over the main processor which leaves the fan visible for cleaning and lubing. In fact only just done that last week and graphics card is now silent running again.

Good deal DJ! Thanks

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Hi!

The fan was loud again today. Didn't really work with silicone...

I went to the next computer store and bought a fan (40x40x10mm), same size as the one in my car that runs with 7-12 volts (12v is original). Just had to remove the old one and braze the new one in. Wasn't too easy because of the size (very thin and small..) but it works great now. Very silent.

If anyone has to do something like that... make sure the fan sucks air from the interieur, don't mount it the other way round.. I'm pretty sure if the fan blows air onto the sensor, the AC wouldn't work as supposed to.

Thank you DJwerkz, would have been a good deal. You also have other parts for my Seville if I need something I guess? I'll call you if I need something if that's okay?! :)

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