Heating & A/C (A7)Câu 91 / 120
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
Giải thích
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.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- The desiccant in a receiver-drier or accumulator is used to:
- Technician A says a low refrigerant charge typically shows low readings on both gauges with poor cooling. Technician B says the leak should be repaired before recharging to the correct weight. Who is correct?
- Technician A says cabin heat comes from engine coolant flowing through the heater core. Technician B says a leaking heater core can fog the windshield and leave a sweet smell. Who is correct?
- Technician A says a stuck-closed blend-air door can cause no heat even with a good heater core. Technician B says a failed blower motor can cause no airflow from the vents. Who is correct?
- Before servicing an A/C system, refrigerant must be:
- Higher-than-normal readings on both the high and low sides of an A/C system, with poor cooling, could indicate:
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