What happens when voltage regulator goes out?

When a voltage regulator fails, it can cause the voltage supplied to electrical components to become too high or too low. This can lead to erratic performance or damage to sensitive electronic devices and systems, as they may receive insufficient or excessive power. Additionally, in vehicles, a faulty voltage regulator can result in battery overcharging or undercharging, leading to battery failure and potential engine issues. Overall, the stability and reliability of the electrical system are compromised.