Electrical/mechanical noise after turning engine off.
02-23-2012, 06:03 PM
#1
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Electrical/mechanical noise after turning engine off.
When I turn the ignition off after a drive, there is a 'whiring' noise from the front that sounds like a fan is still running or something like that. Not sure how long it last for as I get out of the car before it stops.
Can anyone tell me what that is? It's not that I think its a problem, i'd just like to know out of interest.
cheers
Simon
Can anyone tell me what that is? It's not that I think its a problem, i'd just like to know out of interest.
cheers
Simon
02-24-2012, 11:00 PM
#5
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yes, that runs for a bit. If it's loud, you might look into cleaning/lubricating it. The unit slides out the front and the fan kind of hangs off the back.
02-26-2012, 10:55 AM
#6
fan in the dash
Should this ccu fan be running after the car is shut off as mine does not there is a noise after unhooking the battery and then back up but this noise is the c d player as I put a disk in and pushs it back out and the noise stops.
I am wondering if I may have a bad fan, The system operates just fine though..
Hey a Post Script this is my 100th post bout time to join the club now
I am wondering if I may have a bad fan, The system operates just fine though..
Hey a Post Script this is my 100th post bout time to join the club now
02-26-2012, 12:10 PM
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02-26-2012, 02:50 PM
#9
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Yes, the fan is part of the CCU, and you can pop it loose and pull it towards you, out the front of the dash. You can accomplish this with two lengths of wire coat hanger. Cut a 8" length of wire and bend it into a U shape, so that you have two ends that are about the right distance apart., based on the holes on both sides of the front CCU trim plate. Repeat... then use them like a 'key' to push into the holes. If you get them just deep enough (guessing about 1/2") they 'unlock' the CCU unit, and you can pull it out. Gotta go by feel, but it works for the stock radio too.
02-26-2012, 02:52 PM
#10
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Once out of the dash, the fan is bolted to the back of the CCU. You can lube the bearings which usually quiets it sufficiently!
04-10-2019, 04:11 AM
#13
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The CCU with fan stays on for up to 20 minutes after ignition off.
This is done to ensure correct cabin temperature measurement during short stops such as at a gas station or similar.
The temperature sensor is placed inside the Climate Control Unit, just behind the small circular grille. The fan at the rear sucks air from the cabin over the sensor.
As the unit gets hot during use, a shutdown of the fan will cause heating of the sensor, and erroneous cabin temp readings. This also happens when the fan stops due to wear, and the CCU erroneously measures rising cabin temperatures when driving. It will then gradually reduce the amount of heated air from the engine.
The user most often turns up the temp **** to compensate, and ends up at almost maximum after 2-3 hours, depending on ambient temperature.
Cheers,
Tore
This is done to ensure correct cabin temperature measurement during short stops such as at a gas station or similar.
The temperature sensor is placed inside the Climate Control Unit, just behind the small circular grille. The fan at the rear sucks air from the cabin over the sensor.
As the unit gets hot during use, a shutdown of the fan will cause heating of the sensor, and erroneous cabin temp readings. This also happens when the fan stops due to wear, and the CCU erroneously measures rising cabin temperatures when driving. It will then gradually reduce the amount of heated air from the engine.
The user most often turns up the temp **** to compensate, and ends up at almost maximum after 2-3 hours, depending on ambient temperature.
Cheers,
Tore
