Auto Air Conditioning & Heater Repair: air just blow out my defrost, vacuum lines, vacuum leak

Question
ac-heater all it works but it just blows out the defrost and the motor is running rough with the ck engin lite on this is on a 1996 ford e 150  

Answer
This is a typical VACUUM LEAK in one of the vacuum lines on the engine. Look carefully at ALL your vacuum lines as this will also be the cause of your rough idle and most likely your CHECK ENGINE LIGHT being illuminated on the dash.

What mechanical work or ANY kind of work has been performed on the vehicle recently ?. As most problems that occur after a recent repair was made can be traced back to the area of where the repair was made as a vacuum line may have been knocked loose or came loose, Look around in the area where work was performed.


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