1. Check whether the wire has power supply, whether the wire is disconnected, whether the plug is firmly inserted, whether the column head and jack are tightly combined, and whether the fuse is blown.
2. Check whether the fuse is blown, if it blows, the fault of the fused should be eliminated. Then check whether the plug is firmly inserted and whether the stigma and jack are tightly combined. Then check if the wires are broken.
3. Check the contacts of the temperature regulator and timer, if the contact contact is poor, such as the distance is too large, the moving contact and the static contact are not in close contact, in fact, it is equivalent to an open circuit, the two contact points should be connected one after another, and the wearing parts can be replaced if necessary.
4. Check whether the tubular heater is plugged in well. Inside the heater, there is a concern about whether the hot wire has burned. During the inspection, the two terminal posts of the heater can be detected by testing the heater with a multimeter, and if the circuit is found, the electric heating pipe should be replaced.
