Which symptom indicates a faulty condenser fan motor in an air-conditioning system?

The correct response indicates a specific symptom associated with a faulty condenser fan motor. When a condenser fan motor is not functioning properly, it can lead to inadequate airflow across the condenser coils. This deficiency in airflow causes the refrigerant to not dissipate heat effectively, resulting in a rise in both high side (discharge) pressure and low side (suction) pressure.

In a normal operating condition, the condenser fan helps maintain the appropriate pressure by promoting efficient heat exchange as the refrigerant passes through the condenser coils. If this fan is faulty and not providing sufficient airflow, the refrigerant struggles to release heat, which leads to an increase in high side pressure. A similar situation arises at the low side, resulting in high suction pressures due to the refrigeration cycle being adversely affected.

As a result, the scenario described leads to both high suction and high discharge pressures, confirming the presence of a faulty condenser fan motor. Understanding these operational principles helps technicians diagnose air conditioning problems more effectively.