Fluctuating power supply can affect the thermistor in your Frigidaire refrigerator. Inconsistent voltage can lead to irregular performance of the thermistor, impacting its ability to accurately detect and transmit temperature data. This can result in erratic cooling patterns and potentially trigger error codes like the H1. To protect your refrigerator from power surges and fluctuations, consider using a voltage stabilizer or surge protector. Regularly monitoring your appliance’s performance can help detect issues related to power supply. For more on how power affects refrigerator components, read “Impact of Power Fluctuations on Frigidaire Refrigerator Thermistors.”