Heating & A/C (A7)第 92 / 120 题
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
解析
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.
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