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General E46 Forum
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Old 09-23-2007, 04:53 PM   #1
inline 6
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Cool HELP:Radiator fan contiues to run after the car has been off

Been having issues with the radiator fan running even after the car has been off for 2 hours. This just started a couple of days ago, havent done any engine mods lately except put in a new battery a week ago. Ive been popping my hood everywhere i park to disconnect the fan looking like a idiot! I think the fan is still in working order, so im thinking a sensor has gone bad? The coolant thermostat was replaced like 3 months ago along with the temperature sensor in the coolant hose. Are there other sensors that might be the culprit to the fan staying on??? Thanks for any input, 6.
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Old 09-23-2007, 05:06 PM   #2
RockerGuy
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U need a new fan. Trust me u cant get an individual box on the fan separately. The fan cost a lot too.

g'luck
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Old 09-23-2007, 05:10 PM   #3
inline 6
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U need a new fan. Trust me u cant get an individual box on the fan separately. The fan cost a lot too.

g'luck
Dam, I was hoping not to get that response. So there arent other sensors that might be causing this? Thanks Rockerguy for the input.
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Old 09-23-2007, 05:17 PM   #4
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[QUOTE=inline 6;6649904]Dam, I was hoping not to get that response. So there arent other sensors that might be causing this? Thanks Rockerguy for the input.[/QUOTE

There is a box behind the fan itself. I think that might be responsible. Unfortunately that box is not sold separately. If u can get that box somewhere g'luck and please tell me.

When mine went out, I was like u and didnt wanna replace the whole fan, its such a waste, but there were no alternative. That week my reservoir also popped, that made me get a fan immediately.
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Old 09-23-2007, 05:48 PM   #5
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I bet it's just the fan relay. Unfortunately I don't think BMW sells the relay separately, so you may try calling around to junk yards / BMW specific salvage yards.
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Old 09-24-2007, 03:54 PM   #6
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Hmm, Im gonna take your advise KirsL and try looking around some junkyards and see if i can pick one up. Do you think that if i were to get some crappy ebay fan and replace the module itself will be ok?
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Old 09-24-2007, 03:59 PM   #7
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This happened to me during the summer. I was in the same state of mind about trying to avoid the dealership. Don't beat around the bush, you need to go to the stealership. The relay won't cut it. That was the biggest hassle plugging it in and out everytime. Especially when it was raining. But plan on spending around 500 big ones.
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Old 11-10-2012, 12:10 PM   #8
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Could also think about the fan sensor switch on the lower radiator hose.
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Old 11-10-2012, 01:17 PM   #9
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Do a search on the FSR, I replaced mine after experiencing similar symptoms. It's about $75 and fairly easy to install.
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Old 11-10-2012, 05:30 PM   #10
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Holy bump, Stinger!

I believe, btw, that I've heard of the relay itself available for fan...but haven't heard a long-term report on them.

tcphoto...not fsr as he's talking about fan behind radiator. FSR does lead to the battery draining, though.

The issue with the radiator fan is that they've been known to burn if left running continuously. Not good!
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Old 11-10-2012, 06:24 PM   #11
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This isn't too expensive and it's an easy DIY.

http://www.bmaparts.com/item.wws?sku...CH&weight=9.95

Cheapest BEHR I can find.
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Old 11-10-2012, 06:32 PM   #12
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theres a guy parting out http://forum.e46fanatics.com/showthread.php?t=954594 maybe pm him
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Old 11-10-2012, 06:51 PM   #13
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Holy bump, Stinger!
This thread linked by the fest today, so I wanted the info included.
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