How to repair the stainless steel electric heating coil if it does not heat?

When the stainless steel electric heating coil does not heat, you can follow the steps below to repair it:
Check the power supply:
First check whether the power plug is plugged in properly and whether it is loose. You can re-plug the plug to ensure good contact.
Check whether the socket is powered on. You can use an electric pen or a multimeter to measure the voltage of the socket. If there is no voltage in the socket, check whether the upper power switch, fuse, etc. are normal. If there is a problem, repair or replace the relevant parts.
Check the heating coil connection line:
Check whether the power cord of the heating coil is damaged, broken or the internal wire is disconnected. If so, replace the power cord.
Check whether the connector of the connecting wire is loose, oxidized or corroded. If so, clean the connector, re-tighten or replace the connector to ensure a firm connection.
Check the temperature controller:
Check whether the temperature controller is set correctly, whether the temperature is set too low or set to off due to misoperation. If so, reset the appropriate temperature.
Observe whether the display screen of the temperature controller is displayed normally and whether there is a fault code. If there is a fault code, refer to the controller manual and handle it accordingly according to the meaning of the code.
Use a multimeter to check whether there is voltage output at the output end of the temperature controller. If there is no voltage output, it means that the temperature controller may be damaged and needs to be replaced with a temperature controller of the same model.
Check the resistance of the heating coil:
Use the resistance range of the multimeter to measure the resistance value of the heating coil. Under normal circumstances, the resistance value of the heating coil should be within a certain range of its rated resistance value (generally an error of ±10% - ±20% is allowed).
If the measured resistance value is infinite, it means that the heating wire inside the heating coil has burned out and a new heating coil needs to be replaced. If the resistance value differs too much from the rated value, it may also be that the heating wire is partially damaged or aged. It is recommended to replace the heating coil.
Check other components:
Check whether the heating coil is installed correctly and whether there is poor contact or mutual extrusion with other objects. If so, readjust the installation position to ensure that the heating coil fits tightly with the heated object and there are no obstacles around.
Check whether the outer shell of the heating coil is damaged or deformed. If so, it may affect the heating effect and the outer shell needs to be repaired or replaced.
When repairing a stainless steel electric heating coil, the power supply must be cut off first to ensure the safety of the repair. If you are not familiar with electrical knowledge, it is recommended that you have a professional electrician perform maintenance to avoid safety accidents such as electric shock.