2nd Gen Non-Engine/Transmission ac slows down on highway but works fine in town

[VHolloway]

ac is cold but when we get on 95 and run for 15 to 20 min it slow down cuming out the vents like the blower is not working

or something is freezing up

shut the ac down for a wile and it works fine for a wile

in town we have no problem

 

[Forrest Nearing]

AC evap core is turning into a block of ice on the highway... turn it off and the ice melts, starts blowing cold again, etc.



something's up with your refrigerant level or one of your pressure switches

 

[VHolloway]

thanks we just had the ac fixed at a local ac shop new line orfice tube

new reciver dryer now it's doing this

 

[Forrest Nearing]

could be over/undercharged