1. According to the display of Pinduoduo official website, determine whether the base power supply is in good contact, and then check the switch. You can open the switch to check whether the contacts are in good contact.

2. Unplug the power supply for three minutes, plug in the power supply to restart, and press the function key to operate.

Check whether the "heating wire" is broken or the "thermostat" is broken. There are many cases where the thermostat is broken. Buy a thermostat and replace it.

4. There is no heating after power-on, and the indicator light is not on. The fault is that the power supply is not connected to the electric heating tube circuit.