Maintenance method: First, check whether the heating wire is broken or whether the thermostat is broken. Go buy a thermostat and put it on. 1) does not generate heat after being electrified, and the indicator light does not light up. Faults are often caused by the power supply not being added to the electric heating tube circuit. When overhauling, you can first measure the resistance of L and N ends of the 3-core plug on the base power cord with a multimeter R× 10. Normal. First of all, you should make sure whether the power supply of the base is in good contact, and then look at the switch. You can open the switch to check whether the contacts are in good contact.