Heating & A/C (A7)Câu 92 / 120
Higher-than-normal readings on both the high and low sides of an A/C system, with poor cooling, could indicate:
a.A low refrigerant charge
b.An overcharge or a condenser airflow/cooling problem
c.An open blower resistor
d.A stuck-open thermostat
Giải thích
High readings on both gauges often point to an overcharge or inadequate condenser cooling from a blocked condenser or inoperative cooling fan. Verifying charge weight and fan operation is the next step. Correcting airflow and charge restores normal pressures.
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:
- An A/C compressor clutch that will not engage could be caused by all of the following EXCEPT:
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