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a/c changes to defrost when driving

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Old Aug 6, 2021 | 08:43 PM
  #1  
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johncoody
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a/c changes to defrost when driving

I have an issue were my ac changing to the defrost while driving. I know am losing vacuum. I replaced all the rotted lines from the intake to the white hose going into the firewall. Also were the small check valve is.
I removed the blue line going to the actuator for the blend door.no vacuum. I was told that my vacuum canister is leaking and i know there is one behind the battery. is there another canister i am missing? tks john
 
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Old Aug 11, 2021 | 05:31 AM
  #2  
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i-w
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check vacuum hoses. might be a missing check valve or backwords check valve.
 
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Old Aug 20, 2021 | 04:56 AM
  #3  
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buy a vacuum pump and check the can and all the actuators. You can guess all day long and get nowhere.
 
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