Heating & A/C (A7)第 91 / 120 题
An A/C compressor clutch that will not engage could be caused by all of the following EXCEPT:
a.A low-refrigerant lockout from the pressure switch
b.A blown clutch fuse or relay
c.An open clutch coil
d.A clogged cabin air filter
解析
The clutch may fail to engage due to a low-charge lockout, electrical faults, or an open coil, but a dirty cabin filter only reduces airflow, not clutch engagement. Diagnosis checks power, ground, and the pressure switches. A cabin filter affects volume, not the refrigerant cycle.
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