There are two situations that will cause the heating wire to turn red:
1. Abnormal use, such as towels, clothes blocking the wind mouth or hair dryer into the shoe inside, as well as other forms of blocking the hair dryer. This situation needs to be cut off the power supply and wait a few minutes to ensure that the air inlet and outlet without blocking the use of the boot, such as still appear, apply for after-sales;
2. If the hair dryer itself fails, apply for the after-sales service center.