Short version: When set on MAX A/C under light throttle it will default to floor/defrost, when on NORMAL it defaults under medium throttle. There is no hissing noise but this does sound like low vacuum.
I am going to look into it this weekend with a vacuum gauge. The hoses and lines look ok under hood. And I have not done the self test as of yet, will it give a code for low vacuum?
Any suggestions on where to start?
03 GM
Auto Climate Control
I am going to look into it this weekend with a vacuum gauge. The hoses and lines look ok under hood. And I have not done the self test as of yet, will it give a code for low vacuum?
Any suggestions on where to start?
03 GM
Auto Climate Control
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