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UNCjeepWK2 07-16-2013 11:20 AM

A/C issue in 2011 WK2 Laredo X
Having an odd issue with the AC in my 2011 Laredo X with auto climate (49k miles). On startup, the AC comes on full blast and stays on for a couple of minutes... then completely shuts off for a couple seconds, then comes back on full blast... and repeats this cycle several times.

Anyone had this happen? Any remedy?

Ratchet 07-16-2013 12:38 PM

Re: A/C issue in 2011 WK2 Laredo X
I've been through this a few weeks ago. Culprit was a broken actuator gear/stop on the passenger side temperature blend door. Discovered this when the ladyfriend complained there was no cool airflow coming from the vents. Not saying your passenger blend door will be the issue, but I'll bet money on a broken actuator gear for either the mode door, or temp blend doors.

What happens is when the temp actuators sweep to adjust to the desired temp, if the gear is broken, they either travel too much or not enough. The Hvac module detects the travel is out of range and basically reboots itself.

If it is a broken gear, they retail for appx $5. I haven't had to repair one for the drivers side temp blend door, but the one for the passenger side is very easy to do as long as you have a T20 torx bit and a short handle 1/4drive ratchet.

Best thing to do is set the temp to 70 and let the AC run in auto mode for a bit and observe if there is a noticeable difference in the output air temperature from the left and right dash vents. This will point you in the direction of wether it's a blend door or not. If you switch modes (floor, defrost, face...etc, and the position of air output doesn't change, that will reveal it's a mode door/mode door actuator issue. I will not rule out the recirculate door actuator either, but from what I've seen, they haven't given as many issues as of recently.

UNCjeepWK2 07-16-2013 02:16 PM

Thanks... very helpful and interesting. What is a blend door?

Ratchet 07-16-2013 02:31 PM

Re: A/C issue in 2011 WK2 Laredo X
A blend door is what regulates the temperature of air emitted from the vents inside the cabin. There is an evaporator core (AC) and a heater core (obvious) inside the HVAC assembly. The blend door allows for a mix of air temperature from both cores or a single core to achieve the desired air temperature. It pretty much works the same way a mixing valve on a sink or shower faucet works.

Given your screen name, I'm guessing you may be from around the Triangle area? If so, shoot me a PM and I may be able to help you out with the diagnosis. ;)

CardinalFan81 07-16-2013 09:12 PM

Re: A/C issue in 2011 WK2 Laredo X
This happened to me too but at 35.5k miles so I'm not sure how much it would've cost to fix. Same vent, but mine had a slight noise coming from the vent as well.

CardinalFan81 07-16-2013 09:14 PM

Re: A/C issue in 2011 WK2 Laredo X
That's funny I'm from Winston Salem (not living there right now though).

UNCjeepWK2 07-17-2013 05:38 AM

Also from W-S but now live and work in Salisbury.

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