AC quirk - 05 Caravan


#1

I have 05 Caravan, 4 cyl, 115k. Runs fine (just got back from a 2000 mile trip) that seems to have a quirk or something with the AC.

When I have the AC on and stop at a light, it feels like it hesitates several times. I almost think it’ll stall (never has). I usually end up turning off the AC while we’re at the light, and start it back up when I accelerate. When the AC is off, there is no hesitation. Also, If I put it in park, and we have the AC on, no problem. I rarely, if ever, have the recirculation going.

One thing of note: I usually wait until I’m out of our neighborhood and on the main street before turning it on. That means the windows are down until I turn it on. When I do, occasionally I hear a sound that best can be described as similar to the sound of loosening a tight lug nut. Still, as long as I’m driving, there is no hesitation and it cools fine.


#2
"When I do, occasionally I hear a sound that best can be described as similar to the sound of loosening a tight lug nut."
Could this be a squealing belt? When was the last time the serpentine belt was replaced?

#3

I don’t think it’s the belt. Granted, it’s probably close to the time to change it, but I don’t have any other belt issues. No squealing, chirping, etc. at all.

The sound is very brief, just the time it takes me to turn the AC on.


#4

To me, not an A/C guy, it sounds like the compressor clutch is on it’s way out and/or the compressor is binding, but I’d have to have someone more familiar with this than me verify it. There could also be a problem with the idle air control, causing it to almost die at low RPM’s.


#5

Thanks! I was thinking it may be the clutch. It doesn’t have any other idle issues. There is no problem at all when the AC is off.


#6

Have the plugs been changed. I had a guy bring me a Honda that would not idle with the AC on. His plugs were very worn. Replaced them and the wires and it ran like a top.


#7

Plugs and wires are sitting in a bag in the house. Maybe I’ll get a chance this weekend. Thanks.