new to the expedition, a/c question

[lineman1398]

we recently bought a 2001 expedition eb with 63000 on it. It has the 5.4l engine, 4x4. Within the first day i had it the trans went out and had to be rebuilt, fortunately it was covered under the warranty… we just took a 600 mile trip to the outer banks from maryland and used the a/c consistently for the first time. it works great unless the motor is working a little harder than usual, such as passing vehicles or going up hills… and when it is working harder the a/c stops coming from the vents and comes out of the defroster. is this normal or is there something wrong?

 

[IMINYOURCHAIR]

sounds like a vacuum leak after where those hoses connect. or a bad check valve.

 

[lineman1398]

thank you for the information and quick reply

 

[IMINYOURCHAIR]

no problem, do you have the etac or the control with knobs? (manual)

 

[lineman1398]

no knobs, the etac.

 

[EightIsEnough]

Definitely a vacuum leak in a line to the vents. I had an old Dodge do the same when the lines began to rot. Increased load from the engine puts more pressure in the line than it can contain.

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