What will happen if a start capacitor remains in the circuit too long?

If a start capacitor remains in the circuit too long, it will eventually fail, often leading to self-destruction. The purpose of a start capacitor is to boost the electrical current during the initial startup phase of a motor, providing the extra torque needed to get it running. However, once the motor reaches a certain speed, the capacitor is intended to be disconnected; if it remains in the circuit, it can become overloaded.

This prolonged exposure can cause the dielectric material within the capacitor to overheat and break down, which may lead to the capacitor failing catastrophically. This failure can manifest as bulging, leaking, or even bursting, resulting in damage not only to the capacitor itself but potentially to other components in the motor circuit. Understanding the specific role and limitations of start capacitors is crucial for maintaining motor efficiency and preventing damage.