What's wrong with the foot warmer not heating up

1. Check power supply
When the foot warmer is not heating, the first thing to check is whether the power supply is normal. A multimeter can be used to test the on/off status of the power cord, power switch, and heating wire. Usually, it is common for the power switch to be damaged, followed by the power plug. If there is a problem with the power supply, you can replace the power switch or power plug to solve it.
2. Check internal components
If all the above checks are normal, but the foot warmer still does not heat up, further inspection of the internal components of the foot warmer, such as heating elements, temperature controllers, etc., may be necessary. The damage to these components may also cause the foot warmer to not heat up. Before conducting internal component inspections and maintenance operations, make sure that the power supply has been disconnected and the foot warmer has completely cooled down. If you are not familiar with electrical maintenance, it is best to seek professional assistance to avoid causing greater damage or safety issues.
3. Pay attention to safety
When repairing the foot warmer, be sure to pay attention to safety. Firstly, make sure that the power has been disconnected and that the foot warmer has completely cooled down. Secondly, during the inspection and maintenance of internal components, it is important to avoid touching the internal components of electrical appliances to prevent electric shock or other safety issues. If you are not familiar with electrical maintenance, it is best to seek professional assistance.