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Matt-Matt
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PostPosted: Mon Jul 14, 2014 7:52 am Reply with quote Back to top

Hey guys,

So my radiator and fan tend to run really quiet/off and then when the car hits around 90c it just goes on full speed for a few minutes and then back on low/off again.

I was checking my fuses the other day and noticed that a relay was missing for "fan speed 1".

So things are starting to make sense now as to why it's having the erratic behavior when the car isn't moving. Does anybody know what kind of relay I'd need?



The slot I'm talking about is below the 214 Relay, the furthest to the right on the second row.

Oh and the car in question is a 1994 Audi 80 2.6E Auto.
 
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Mikes2
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PostPosted: Mon Jul 14, 2014 11:53 am Reply with quote Back to top

Does your car have air-con ?

Speed 1 is afterrun. The fan will also run on speed 1 all the time if you have air-con, providing the outside temperature is above 5 C.

It's possible the 214 is in the wrong place if you don't have air-con

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Matt-Matt
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PostPosted: Mon Jul 14, 2014 1:02 pm Reply with quote Back to top

Mikes2 wrote:
Does your car have air-con ?

Speed 1 is afterrun. The fan will also run on speed 1 all the time if you have air-con, providing the outside temperature is above 5 C.

It's possible the 214 is in the wrong place if you don't have air-con


Yeah it does have Air-Con, I thought all of these had them. The majority in Australia do at least. But okay then, so it's meant to not have the relay there then? Smile
 
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Mikes2
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PostPosted: Tue Jul 15, 2014 3:18 pm Reply with quote Back to top

Almost no UK Audi 80s came with air-con.

Here's my old S2 fuse box - no air-con



It will be a 214 relay for position 12 if it's meant to have one.

Does your fan run all the time when the air-con is running ?

If it does, you don't need a relay. If it's not running, you need a 214

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Matt-Matt
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PostPosted: Wed Jul 16, 2014 5:45 am Reply with quote Back to top

Mikes2 wrote:
Almost no UK Audi 80s came with air-con.

Here's my old S2 fuse box - no air-con



It will be a 214 relay for position 12 if it's meant to have one.

Does your fan run all the time when the air-con is running ?

If it does, you don't need a relay. If it's not running, you need a 214


Oh okay, wow that's interesting.

Yeah, the fan runs when the Air Con is on, the radiator is just silent and then goes on full boar when I'm in a carpark or a drive through it just ramps up to full speed. Must just be the fan then.

Thanks for all the help! Appreciated! Smile
 
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Mikes2
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PostPosted: Wed Jul 16, 2014 7:41 am Reply with quote Back to top

are you sure it's going to full speed and not just standard #2 speed.

#3 speed is like a jet aircraft taking off. It really is loud

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Matt-Matt
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PostPosted: Wed Jul 16, 2014 7:43 am Reply with quote Back to top

Mikes2 wrote:
are you sure it's going to full speed and not just standard #2 speed.

#3 speed is like a jet aircraft taking off. It really is loud


I can take a video/audio recording when it warms up next. It's to the extent that if i sit my arm out the window on a cool night it'll warm my arm from the air through the wheel arch.
 
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EightyWay
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PostPosted: Mon Jan 05, 2015 8:33 pm Reply with quote Back to top

Perhaps the right thread - my ace 16v doesn't seem to have have the afterrun fan speed (fan does not stay on when the engine is hot). I leave the ignition on and wait to keep the fan on. Am I missing a 214 relay or something?
 
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EightyWay
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PostPosted: Mon Jan 05, 2015 8:37 pm Reply with quote Back to top

...and the attachment



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Mikes2
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PostPosted: Tue Jan 06, 2015 1:51 pm Reply with quote Back to top

Looks like you might be missing #2. do you have a picture of the lid ?

afterrun only comes on with the ignition off

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hoolio
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PostPosted: Tue Jan 06, 2015 4:56 pm Reply with quote Back to top

apart from the wiring going on in the left hand side this is the same as my 16v 6A


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EightyWay
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PostPosted: Tue Jan 06, 2015 7:07 pm Reply with quote Back to top

@ Mike2 Yes, the post ignition afterrun is not working. I was thinking it could be a 214 relay in position 2 above the jumper - but I am just guessing!

@Hoolio does your fans continue after you switch off your ignition (with a hot engine)?

Here is my fusebox cover:



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Mikes2
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PostPosted: Tue Jan 06, 2015 8:08 pm Reply with quote Back to top

relay 272 (the black one) in position 3 is what controls the after run.

you can usually test the system by joining the 2 wires for the afterrun sender together. If it starts running, change the sender. if it doesn't, there's another fault - usually that relay, fan motor, resistor or the wiring.

You also have to remember, it only operates above a certain temperature so it doesn't run every time you switch off

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EightyWay
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PostPosted: Tue Jan 06, 2015 8:29 pm Reply with quote Back to top

Thanks, I have never heard it run after my ignition is turned off, no matter how long hard and hot it has been. Strangely it does work if I turn the ignition on - I do this after a long drive. At least I know now it is the 272 relay I may swap it out with a spare from a mate and take it from there. Cheers
 
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hoolio
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PostPosted: Wed Jan 07, 2015 4:42 pm Reply with quote Back to top

I'm sure it works fine but to be honest it isn't something that Ive noticed,reckon it'd have to get a serious ragging on a real scorching day for it to kick in.

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EightyWay
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PostPosted: Wed Jan 07, 2015 5:53 pm Reply with quote Back to top

The only reason I thought it should be running was that if I turned on my ignition lights with a hot engine then the fans would kick in. That said my car warms to 87 degrees and stays there, it never goes any higher. My thermostat is 87 degrees too. Probably best not overthinking this.
 
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EightyWay
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PostPosted: Tue Jun 21, 2016 7:56 am Reply with quote Back to top

...to follow up on this my radiator fan speed is now locked on speed #3. It's loud but effective. It turns on immediately as the ignition is turned on. I am suspecting the sender on the rad. I haven't got any code errors for it. Is it worth replacing the sender on the rad (3 pin by the drain plug)?
 
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Matt-Matt
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PostPosted: Wed Jun 22, 2016 10:30 am Reply with quote Back to top

EightyWay wrote:
...to follow up on this my radiator fan speed is now locked on speed #3. It's loud but effective. It turns on immediately as the ignition is turned on. I am suspecting the sender on the rad. I haven't got any code errors for it. Is it worth replacing the sender on the rad (3 pin by the drain plug)?


Yes it's worth replacing as it may be that, they're not too expensive. Mine was $38 here in Australia so it's likely a lot cheaper there. Mine was covered in coolant sludge..

It's a radiator out job, or if you cut off the end of a deep socket it can be done without taking it out. It however will be a coolant drain job.

You can test it if I recall correctly, assuming it's the same as my Audi 80 V6 (ABC) was. One of the pins is the ground, the other two are the speed 1 and speed 2 signals if it's a three pin that is.

Unfortunately I don't remember much more, as I don't have the car anymore as someone hit me.
 
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EightyWay
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PostPosted: Wed Jun 22, 2016 11:33 am Reply with quote Back to top

Access is pretty good, so no need to remove the rad. I have the Ace 16v engine.
About 17 in these parts. My coolant hoses need to be replaced anyway (recent steam action on the motorway. Crumbling top hose. Thankfully not the head.



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EightyWay
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PostPosted: Fri Jul 01, 2016 4:12 pm Reply with quote Back to top

Sorry about your accident Matt. Am I right that the afterrun sender is actually run by the while 2 pin sensor at the back of the block? I actually think both sensors are acting up. I do a bit of diagnosis on it by connecting those 2 wires together (ignition off?)
 
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EightyWay
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PostPosted: Sun Jul 03, 2016 1:15 pm Reply with quote Back to top

That worked out well. I had a 29mm deep socket for the topside sensor which fit over the rad sensor too. I worked quick as not to loose too much coolant. The replacement part was a Febi 1528 Radiator Fan Switch. Caught the spillage in a tray and recycled it (fairly recent fluid). And then...nothing! no more noise. Later on the car was up to temp and the fans started spinning at low speed. No need to bleed the air this time, Perfect.

The radiator fan afterrun is still a potential issue. That sensor at the back of the block is hard to get to!
 
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vmx1200
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PostPosted: Sat Jun 24, 2017 5:45 pm Reply with quote Back to top

Hi all as this thread is not too old I wonder if anyone could help me?
I have a 92 2.0 cabriolet with an ABK engine, As soon as the battery is connected the cooling fans start running at what i think is speed 1, if fuse 20 is removed the fan stops. I have removed radiator fan relay(214) from position 2 and tested it and it seems OK.
Having read this thread it appears the radiator fan delay relay (272) controls the afterrun which is presumably what is happening even though the engine is stone cold????
I will get a new relay to exclude it but someone mentioned a sensor, any idea where this is? There is a sensor (2 wire) on a bracket attached to the head ....not sure if this is it but disconnecting it does nothing

Thanks



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Mikes2
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PostPosted: Mon Jun 26, 2017 12:23 pm Reply with quote Back to top

https://audi.7zap.com/en/rdw/audi+80+90+avant/a80/1994-150/9/919-919060/

number 7

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vmx1200
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PostPosted: Tue Jun 27, 2017 12:00 pm Reply with quote Back to top

Hi and thanks for this link, it is extremely useful Cool

I am please to report that the problem has been solved with the help of info in this thread.

When I removed the fan delay fuse 20 the fan didn't run when connecting the battery however the full speed fan worked fine at 90 degrees.

I ordered a second hand relay 272 for 10 GBP and that has cured the problem

Thanks again to all those who contributed to this thread previously
 
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