Rear ac not blowing cold

[DallasTahoe]

2005 Yukon with rear ac, it blows but not cold, front ac works great! Is there anything I need to check or easy solutions??


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[UmmScott]

1st... you need to do this.
Takes 30 seconds.

Feel the ac lines in the back right where they go up into the truck.
Small line should be warm to hot.
Big line should be cold to very cold.
If not, then you likely have a bad expansion valve.

If they are hot and cold and you dont have cold airflow. Then you have a blend door problem

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[DallasTahoe]

1st... you need to do this.
Takes 30 seconds.

Feel the ac lines in the back right where they go up into the truck.
Small line should be warm to hot.
Big line should be cold to very cold.
If not, then you likely have a bad expansion valve.

If they are hot and cold and you dont have cold airflow. Then you have a blend door problem

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Ok cool good info I’ll check that later today


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