1994 Audi 80 B4 Fans Stuck on?

Camped on the site Joined: May 10, 2013 Posts: 228

Hey guys,

So i was driving around the city/suburbs the other day and upon returning home i realized my fans were on 100%. They stayed on for a few hours until the battery died.. I am fixing that solution now, but alas the problem of the fans staying on 100% still sticks.

I assume it is a temperature sensor or something somewhere being stuck "on" thinking that the car is too hot and blowing cool air to try and cool it down. The other thing to mention is that I do have an aftermarket radiator fitted (it came like that when I purchased it).

I do have my 1991 Audi 80 B3, which doesn't have that problem sitting in the shed for spares. Could I use the sensor off that?

Cheers,
-Matt

Posted: Thu Feb 20, 2014 1:33 pm

I,d give it a go Smile

Site Moderator Joined: Jan 31, 2003 Posts: 9144

I'm guessing that will be fan speed 1 that's running all the time. That's the afterrun fan.

Normal speed fan doesn't run with ignition off.

I'd pull the relay from the fuse box for fan speed 1 or disconnect the wiring from the sensor. It's more likely to be the relay that's faulty

Camped on the site Joined: May 10, 2013 Posts: 228

So I can just fully disconnect the afterrun fan completelty? I may just do that seeing as it will drain the battery if it's low in normal conditions too.. But is it bad to do so?

EDIT: Pulled the 1st speed fan fuse... Still comes on when i hook up the battery. Same with any other fan related fuses.

Camped on the site Joined: May 10, 2013 Posts: 228

Update:

As of today the fans just shut off when the ignition is off..
Don't know what happened but Matt is a happy camper! Very Happy

Newbie Joined: Feb 22, 2009 Posts: 4

Hi all, I have a similar issue on my 1992 cabriolet, the cooling fan starts as soon as the battery is connected, irrespective of ignition switch. The car is a 2.0 e with an ABK engine. If it is the after run fan which fuse controls that and where is the sensor? when the battery is connected the fans start however I cannot hear and relay operating .... should one be? if so which relay would be involved Thanks in advance (I will post on Cabbie forum in case different people read that)

Posted: Fri Jun 23, 2017 1:45 am

Hey Matt, so you still have that car? I thought it was in a crash? or did you buy another one? Very Happy