Hi All I have a challenge for ya...

My 2000 Neon ac only blows cold when brake is pressed. it has been this way sense i bought it used..The previous owner said she had the compressor replaced.

All the ac ppl i have talked to say something in wiring buy i need a good area to start tracing or other answer as to the cause..

Thanks
D

 

im assuming the compressor is turning when the A/C is set to ON?

Im gonna put money the 1 way check valve isnt functioning properly and ur loosing vacuum.
you gonna need a vacuum gauge to diagnose this one and when re-assembling make sure all the vac tubes are greased so they dont leak they have to hold 8 in.Hg.
and there should be no more than a .75 in.Hg. drop on any line

 

yes compressor does turn but its only when brake peddle is pressed. not enough to engage brake just enough for the sensor to light lights.

where would i find a vacuum diagram for the car?