If engine is off then the AC compressor is off and no cool air should come out
so that is normal
as for no cool air when brake on
start engine turn AC on and check the compressor clutch and then ask a helper to step on brake for you
and if the compressor clutch shuts off then ask the shop where you had it replaced if they did any rewiring
good luck
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Sunday, February 10th, 2008 AT 7:18 PM