hey everyone i think my second aux fan isnt coming on... car starts to overheat after fully warmed up and if on idle for awhile..(only on hot days) can driving on highway forever with no issues..Also ive notice my ac on idle is kinda warm on idle as well.. Ive been reading theres a 30amp fuse or 40amp fuse not sure where it ..I have a 1998 a4 2.8q Ive also change coolant tempsor but didnt fix it. When overheating it is one bar pas the middle Thnx everyone

 

Have you actually looked to see if its coming on? You should be able to hear it if you let it idle in the driveway with the door open.

I'm pretty sure the fuse in in the aux fuse box under the hood under the cowling cover.

 

yes i have checked and it doesnt seem to come on...

 

Yeah I'm havin the same problem on mine, haven't had time to trouble shoot it yet to see if its the fan motor or a fuse or what. I'll let you know what I find after this weekend

 

ok.. let me know how things go. thanks

 

Hi everyone... I'm new to the forum, and i'm new to audis... But my new (to me) audi is driving me bananas.

I'm having this same overheat problem. The car is fine all day while it's driving, but if i get stuck in stop/go traffice on a hot day i'm screwed adn the water temp will rise until i get moving again.

What do you guys think? temperature sensor/switch? water pump? the AC still blows cold... and infact, when i turn the AC off the temp will usually settle down a bit.

any help is appreciated.

thakns.

 

fan, fan switch, fan relay, partial blockage in radiator or elsewhere in the cooling "circuit"

 

Wheres that fuse under the hood?

 

maybe your thermostat is stuck open?

 

Nope, that wouldn't be a thermostat problem. It's either fan-related or a partial blockage in the cooling loop.