I need help! 1988 300e, after moving back to Texas my AC began having problems. The expasion valve was replaced. The electic cooling fan is working properly. My pressure reading look good.

Problem when the temp in Texas is over 85, I have to drive over 40 for effective cooling. Still it does not cool like a GM.

The pressure setting are good, but if the outside tempature is above 85, the reading increase until the pressure sensor cut's off the compressor.

A note to the two post that have been made: The economy setting does not engage the AC or cooling fan.

Any sugestions,

Thanks,

NNBC