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Discussion Starter #1
I have an '06 LE that's developed a problem the dealer can't fix. On long, cross country drives (6hrs plus), the A/C and fan will quit working. The fan indicator bars show full "on" and you can hear the fan motor running but absolutely nothing comes out of the vents. When I stop, I get a huge puddle of water (much more than the normal condensation drips one gets from an A/C). I'm pretty sure that the system is freezing up but I can't make the connection with no air coming out of the vents.

It's rendered the truck useless to me for long drives and the dealer never sees the problem because they don't go out for 6 hour test drives. No service bulletins on this and I'm frustrated. Any ideas?
 

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Bring it to him after a long trip.
 

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garyo11 said:
I have an '06 LE that's developed a problem the dealer can't fix. On long, cross country drives (6hrs plus), the A/C and fan will quit working. The fan indicator bars show full "on" and you can hear the fan motor running but absolutely nothing comes out of the vents. When I stop, I get a huge puddle of water (much more than the normal condensation drips one gets from an A/C). I'm pretty sure that the system is freezing up but I can't make the connection with no air coming out of the vents.

It's rendered the truck useless to me for long drives and the dealer never sees the problem because they don't go out for 6 hour test drives. No service bulletins on this and I'm frustrated. Any ideas?
Absolutely. And I can't believe that they can't fix the problem without actually experiencing it.

The evaporator coil is freezing with ice. When it does, the air passages through the coil are blocked. When the ice melts, it'll drop lots of water . . may even miss the integral drain pan in the evap coil compartment.

This is a common problem with AC units. That's why I have trouble believing that they can't fix it. The system is either low on refrigerant, has insufficient airflow to keep the evap coil temperature above 32 degrees, or has a faulty expansion device that is not regulating the refrigerant into the evap coil properly. There may be some other control allowing icing of the evaporator coil.

You should not have to put up with this problem. It should not be difficult for a competent and trained technician to diagnose and remedy.

This is my educated diagnosis from your description. I own a medium-sized residential and light commercial air conditioning company (less than 20 employees) and have almost 30 years of training and experience. AC is AC, whether in a vehicle or in a structure. The same refrigerant cycle applies.

Ken
 

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My 08 did the same thing on a 7 hour drive. The dealer is replacing my control unit saying they had problems with the control unit. ^^ is right and I should of thought of it too. After I turned off the a/c for about 30 min. it came back like nothing happened.
 

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Discussion Starter #5
Thanks for the input Ken. I took this information to my dealer - who still refused to do anything without witnessing the problem first hand. So I offered to go on a 6-8 hour road trip with one of their technicians or to escalate the problem. Imagine my surprise when they declined the road trip offer. I finally got to a regional VP who agreed to replace the controller unit in my truck. It's on order now. I'll let you know how it works out.
 

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Discussion Starter #6
electricjohn said:
Bring it to him after a long trip.
As soon as I get off the highway the iced up condensor begins to melt. By the time I get to the dealer and they get one of their techs to look at it, enough ice has melted to allow cold air to circulate. They either need to believe me or get in the darn truck for 6+ hours if they want to see the problem for themselves.
 
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