Cause : PTC Thermistor comes when the PTC is not working or the thermistor is not functioning as intended. PTC thermistors are temperature-sensitive resistors that increase their resistance with an increase in temperature. They are commonly used for temperature sensing, overcurrent protection, and inrush current limiting in various electronic circuits and devices.

If testing confirms that the PTC thermistor is indeed faulty and cannot be repaired, replace it with a new one. Ensure that the replacement thermistor has the correct specifications and is compatible with the application.