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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 04-26-2013, 12:17 PM   #1
xsxpxhx
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Summer is coming and my AC Unit is Acting up

Anyone know what the problem would be? When I turn on my AC the Temp Indicator goes up 3/4's of the way. When I had noticed this, I turned on the heater and it obviously went back 2/4's of the way. Anyone have insight on what it could be? Going to be soing on a long trip and going to get this checked out. Thanks. Happy Motoring!
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Old 04-26-2013, 01:58 PM   #2
illestminimike
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Summer is coming and my AC Unit is Acting up

Sounds like a fan clutch. Inspect it and make sure it spins correctly and is clean.

If it's ok then replace your thermostat and flush/bleed your coolant.
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Old 04-26-2013, 04:25 PM   #3
xsxpxhx
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Originally Posted by illestminimike View Post
Sounds like a fan clutch. Inspect it and make sure it spins correctly and is clean.

If it's ok then replace your thermostat and flush/bleed your coolant.
thank you sir!
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Old 04-26-2013, 06:13 PM   #4
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Summer is coming and my AC Unit is Acting up

No problem bro!
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Old 04-26-2013, 06:39 PM   #5
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It going to be your aux fan. If your car is fine when running without the AC, but heats up with AC on, it is going to be your aux fan. Check BMAParts.com for one. You have to buy the whole fan, you can't buy the controller separately.
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Old 04-26-2013, 06:59 PM   #6
illestminimike
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Summer is coming and my AC Unit is Acting up

Quote:
Originally Posted by BMWCaptain View Post
It going to be your aux fan. If your car is fine when running without the AC, but heats up with AC on, it is going to be your aux fan. Check BMAParts.com for one. You have to buy the whole fan, you can't buy the controller separately.
Not exactly. It COULD be this but most of the time it's the fan clutch. At least on these cars.
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Old 04-26-2013, 07:16 PM   #7
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Not exactly. It COULD be this but most of the time it's the fan clutch. At least on these cars.
No, it has to do with his air conditioning and will be his Aux Fan. If it was the fan clutch, it would also overheat without ac.
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Old 04-26-2013, 07:18 PM   #8
illestminimike
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Summer is coming and my AC Unit is Acting up

Not necessarily. I had the same problem as OP and it was my fan clutch. My aux was perfectly ok. Unless his isn't turning on. He should still inspect it.
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Old 04-26-2013, 07:44 PM   #9
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Yes, not necessarily, I had one where I would turn on the AC and then it would get hot. It was the AuX Fan Controller.
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Old 04-27-2013, 10:31 AM   #10
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Thank you bmw captain and illestminimark. I will inspect it and look for parts
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Old 05-24-2013, 03:31 PM   #11
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Ok, so I took it in and they checked it out. They did not see anything bad with the AC Unit. They drove my car with the AC full blast for 40 mins and nothing! I told them that this only happens when the weather is super hot. So it looks like we will have to wait til summer. Any one else know what the the problem woudl be?

SYMPTOMS:
When AC is on during extreme hot weather, my car indicates that it will overheat. The line is about 3/4 over. Although in moderate temps it acts normal....and ideas??? Thanks all!
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Old 05-29-2013, 03:22 PM   #12
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is there a test for the puller fan clutch to see if it needs to be replaced?
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Old 05-30-2013, 02:18 PM   #13
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is there a test for the puller fan clutch to see if it needs to be replaced?
Ill ask about that
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Old 05-31-2013, 12:57 AM   #14
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Had the same problem on both of my M3s here in Phoenix during summer time.

Was the Fan Clutch BOTH times.
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Old 05-31-2013, 02:07 PM   #15
xsxpxhx
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Had the same problem on both of my M3s here in Phoenix during summer time.

Was the Fan Clutch BOTH times.
thank you xeux, i will look into that and possibly repair it. thanks alot!
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Old 08-28-2013, 10:57 AM   #16
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thank you xeux, i will look into that and possibly repair it. thanks alot!
I just replaced the fan clutch and I still have the problem!!! I dont know what else to do.
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