Noise or Vibration When AC Compressor is On on Kia Optima

A defective AC compressor clutch assembly can cause excessive noise or vibration when the air conditioning is on. Improved parts are available. Replacing the faulty clutch assembly does not necessitate replacement of the complete AC compressor or evacuation and recharging of the air conditioning system.

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Average mileage: 89,934 (38,900–270,000)
12 model years affected: 2001, 2002, 2003, 2004, more2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013
46 people reported this problem
18 people shared problem details
2011 Kia Optima38,900
On long trips, the clutch works and A/C blows cold. On short in town trips, NO A/C!
2003 Kia Optima110,000
When the A/C is on and I am shifting gears, as I let out of the clutch and accelerate, an awful high pitched squeaking noise comes from the A/C belt of the car. I am under the impression that it has to do with the compressor but am not yet certain. I've been advised that it could be other smaller problems. However, the compressor is the only one that fits all of my cars "symptoms." Having the A/C on also causes my engine to run harder and with much less power, as well as die if decelerating from a high speed by only pushing in the clutch and sometimes when slowly shifting gears.
2005 Kia Optima106,000
my clutch assembly won't engage. very loud squeeling noise.
Noise coming from engine compartment when air conditioner is engaged.
2008 Kia Optima58,000
Noise coming from A/C Compressor when A/C is on or when the Defrost is on, Defrost uses A/C compressor.
2006 Kia Optima99,000
ac compressor clutch went out......NO AIR!!!!! also have electrical issues and 4wheel drive indicator keeps coming on when NOT IN 4 WHEEL DRIVE
2005 Kia Optima90,000
Not fixed yet, looking for new ac compressor.
I was using the heater thought it was the blower motor and it eneded up being the a/c compressor clutch
2004 Kia Optima164,000
Clutch froze up,snapped the belt
2010 Kia Optima74,000
When turning on a/c fans makes loud whining noise & does not blow air at full speed.
2011 Kia Optima60,000
This problem started just about the time my warranty expired, of course! Symtoms: 1. a/c takes long to get cold once car initially starts. 2. Only gets cold if engine is running at about 2000 rpms. 3. Compressor makes whining noise.
2001 Kia Optima270,000
Air conditioner comes on. Sounds like a roaring animal. Vibrates so loud we have to turn up the music. Blast it in fact. Costs more to fix than it is worth. So many problems
2010 Kia Optima79,500
Rattling noise when ac is on
2006 Kia Optima50,000
Ihave had 2 air conditioner put in my optima I am trying to fine one more.
2006 Kia Optima65,000
2008 Kia Optima56,000
They replaced clutch hub in 2009 and its doing it again , but they dont hear it when i take it in , and say that it is just wear and tear .. But it makes same noise that it did before they replaced it .. its dumb blonde syndrome they have with me i guess .. They think i am being picky i'm sure .
Squeaky noise at the air conditioner clutch, not covered under extended warranty
Has started making a grinding noise so far only when the AC is on. It does not do it all the time yet but is getting more frequent. Will take to the dealer next week.
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