Heating & A/C (A7)Question 92 of 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
Explanation
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.
Practice all 120 questions free — no signup required.
Related questions on this topic
- 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:
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against ASE Automobile Certification Series (A1–A8) · How we review