What is the effect of a bad condenser motor?

A bad condenser motor can significantly impact the functioning of an HVAC system, primarily causing issues related to pressure levels within the system. In this case, a failing condenser motor will lead to a situation where it cannot effectively circulate refrigerant through the condenser coils. This inefficiency results in decreasing the heat transfer process, which in turn causes an increase in pressure within the system.

When the condenser motor is not working correctly, the refrigerant does not release heat effectively. As the system continues to run while the motor is underperforming, the pressure in the condenser can rise excessively, leading to potentially unsafe conditions and damaging the overall system components.

In a properly functioning system, the condenser motor helps to maintain the necessary airflow across the condenser coils, which is crucial for efficient heat exchange. Given that the other choices do not align with the primary impact of a failed condenser motor, it’s clear that high pressure is a direct consequence of this failure, making it the correct answer.