OldSchl90

I started my car this morning and i drove it for about 25min, by the time i reached downtown i noticed that the coolant temp was at about the lowest level it has ever been. I got out of the car and right away i noticed that both of the fans were running at full speed. I opened the hood and i was right. They were blowing so hard they nearly blew the hat off my head, does anyone know what could be going on? Is it some kind of sensor or relay can someone help me out? Thank you

Owner since 95 but noobster since 04
Jack

MikTip

1. If your rad. fan is running constantly [2]
I would look more at the coolant temp sensor instead.not the sending unit but the Engine Coolant Temp Sensor. If that is faulty or a short somewhere in the circuit then it would cause your veichle to run at base timing and also would keep ur fan running...

https://forums.audiworld.com/9080/msgs/139412.phtml (text/html) Wed, 03 Dec 2003 19:00:16 GMT, 442 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
2. Re: cooling fan sensor and temp gauge sensor... [2]
The cooling fan sensor is located in the lower radiator hose. Another reason the fan may be staying on all the time is the A/C switch. This is what was wrong with my 'new' 88 90q. The little light in the A/C switch worked correctly, but the part of the...

https://forums.audiworld.com/9080/msgs/181917.phtml (text/html) Sat, 10 Apr 2004 22:27:17 GMT, 1293 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
3. No Heat or Blower Fan Running [2]
After I started my '91 CQ this snowy morning, I turned on my heater and heard unusual brief clicking noises under the dash. The Outside Temp light blinked and I noticed the fan is not responding to any of its settings. I have no air coming from my vents...

https://forums.audiworld.com/9080/msgs/140565.phtml (text/html) Sun, 07 Dec 2003 20:01:03 GMT, 758 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
4. 1988 audi 90 fan always running when the ignition is turned to acc or the car is running [2]
could anyone tell me why this fan is always running when the car is turned to acc or when the car is on. the thermostat is fine i changed it but the fan always runs when i turn the car off its off but when i start it it always on...

https://forums.audiworld.com/9080/msgs/88230.phtml (text/html) Wed, 30 Apr 2003 08:03:26 GMT, 415 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
5. Is the radiator fan running together with a/c fan when a/c is switch on? [2]
...

https://forums.audiworld.com/9080/msgs/11901.phtml (text/html) Tue, 25 Dec 2001 23:12:15 GMT, 168 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
6. well, when the fan is running, pull a fan relay [2]
the one that stops it its the right one...

https://forums.audiworld.com/9080/msgs/112832.phtml (text/html) Tue, 19 Aug 2003 16:16:36 GMT, 185 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
7. Mechanic said my radiator fan was running nonstop full blast like an airplane engine ... [2]
and never shut off. He took out the fan relay and thumped it, put it back in and it was normal. He said it is the relay that runs the fan full speed which is only used when the car is over heating. He is going to take it out permanently until I get a ne...

https://forums.audiworld.com/9080/msgs/29496.phtml (text/html) Wed, 22 May 2002 08:47:42 GMT, 481 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
8. Car, engine, year? Sounds like you have a smaller engine and the fan running is taking your power!! [2]
...

https://forums.audiworld.com/9080/msgs/40707.phtml (text/html) Sun, 08 Sep 2002 14:08:37 GMT, 196 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
9. What year & model Audi's did you see with the fan running after shutdown? ;o) [2]
...

https://forums.audiworld.com/9080/msgs/40780.phtml (text/html) Mon, 09 Sep 2002 07:37:36 GMT, 177 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
10. Is the radiator fan running? [2]
...

https://forums.audiworld.com/9080/msgs/71933.phtml (text/html) Sat, 08 Feb 2003 15:26:39 GMT, 124 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
11. Re: Is the radiator fan running? [2]
yup! the fan does turn on after a little while......

https://forums.audiworld.com/9080/msgs/71962.phtml (text/html) Sat, 08 Feb 2003 16:52:01 GMT, 179 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
12. cooling fan.. [2]
my cooling fans stayed on when i shut the car off. It killed the battery. I got the car jumped and now I am trying to find where to pull the relay or fuse to shut the fans off. If I turn the car off the fans keep running. 1994 90CS V6. Dont know if it m...

https://forums.audiworld.com/9080/msgs/196510.phtml (text/html) Tue, 25 May 2004 16:13:55 GMT, 538 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
13. AUDI 90 Overheats/boils over but not with a/c running! WHY? [2]
Hello! I have a 1988 audi 90 sedan. I though for so long radiator was busted or something worse because after about 10 minutes of the car running, the coolant tank would boil over and release most of the coolant. after searching this forum, i read a pos...

https://forums.audiworld.com/9080/msgs/183411.phtml (text/html) Wed, 14 Apr 2004 15:55:20 GMT, 838 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
14. Re: Sorry I can't remember exactly right now, but seems I read somewhere about an issue with rad fan [2]
I'd check out the fan too. Maybe it's starting to crap out and drawing more power than it needs to. With the AC on the fan is running on hi all the time correct? I just drove my CQ on an 15hr drive with the AC on the whole time and my fan on hi (afaik)....

https://forums.audiworld.com/9080/msgs/208283.phtml (text/html) Thu, 08 Jul 2004 12:54:55 GMT, 861 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
15. Yep, my car's the same. [2]
Not sure if it's the same issue but the low speed fan thermo-swicth in the radiator in my car doesn't work. When the A/C is on the low speed fan is on all the time so it doesn't get too hot. In my case though it doesn't boil as the high speed fan part o...

https://forums.audiworld.com/9080/msgs/183425.phtml (text/html) Wed, 14 Apr 2004 17:01:49 GMT, 726 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
16. Washed car, 1 hour later.... [2]
After shutting the car down - engine cold, I went into the garage and the rad fan was running on the highest speed - battery was almost flat... so it had been doing it for a while. Pulled fuse for after run fan - no change. Pulled fuse for fan high spee...

https://forums.audiworld.com/9080/msgs/139421.phtml (text/html) Wed, 03 Dec 2003 19:35:21 GMT, 490 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
17. Is this it?? [2]
I removed this connector and the fan still turned on when I turned the key foward. Is this the right one? What is that other red connector that is not hooked up to anything for? If this is in fact the A/C switch that causes the fans to come on with the...

https://forums.audiworld.com/9080/msgs/198044.phtml (text/html) Mon, 31 May 2004 14:41:54 GMT, 533 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
https://forums.audiworld.com/other/msgs/1602517.phtml (text/html) Tue, 16 Sep 2003 11:17:15 GMT
18. Oh...that circuit is hurtin' now!! [2]
Who know's what's on the otherside of it at this point...but I'm pretty confident that it's not pretty. 30amp eh? Alright...likely caused by a combination of dirty contacts (high resistance) and running the fan too long. Needless to say...I'll be re-wir...

https://forums.audiworld.com/9080/msgs/208265.phtml (text/html) Thu, 08 Jul 2004 11:15:12 GMT, 555 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
19. Is there any way to compleatley disconect my A/C system (as I dont use it anyway) and see if.... [2]
my fan stops running whenever the key is in....

https://forums.audiworld.com/9080/msgs/198965.phtml (text/html) Wed, 02 Jun 2004 20:22:37 GMT, 242 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet
20. Agree with MikTip, with a little more: [2]
Are you sure your thermostat is operating properly? That is, does it close and let the engine warm up, then open? If it is stuck wide open, your engine will rarely come up to operating temp, especially on the highway or with the ac fan running. The resu...

https://forums.audiworld.com/9080/msgs/232197.phtml (text/html) Wed, 06 Oct 2004 20:10:03 GMT, 814 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet

25. My fan has been running for like 4 days?? [2]
No matter how cold, when I turn my car on the rad fan is comming on and staying on all the time?? Anyone had any experience with this kinda prob?? I think the fan is in high speed....

https://forums.audiworld.com/9080/msgs/187207.phtml (text/html) Sat, 24 Apr 2004 21:44:25 GMT, 323 bytes
Audiworld > Forums > Audi 90 / 80 / Coupe quattro / Cabriolet

Luxus Panzer

I just replaced my thermal fan switch (screws right into rad)

absolutcq20v

This happened to my 5k, ran at all times FULL speed...culprit was a stuck relay

Coxie

I've owned the wagon for 20 years. Recently I noticed that the fan ran on high speed at normal temp. I then noticed that the fan stayed on when I switched the car off -- not the turbo cooling fan. When I returned, the battery had lost enough voltage so as to keep the starter from engaging. I removed all relays from the fuse box under the hood, and the fan stayed on. I then removed the ground wire from the fan and called AAA. Once home, I recharged the battery and the car starts. I've not reconnected the ground wire to the fan motor until I can determine the location of the fan relay. Any help?