Analysis of the reasons for the broken electric water heater temperature control switch

　　The temperature control switch of the electric water heater is broken. The biggest possibility is that when the water is boiled, the temperature of the thermostat is set too high, exceeding 100 degrees. It is also necessary to check whether the thermostat contacts are sintered. Next, let's learn about the reasons for the damage of the electric water heater temperature control switch.

　　Reason 1: The heating tube and the temperature-sensitive switch probe conduct heat directly through the metal. If the heat conduction is too fast or too high, a malfunction will occur. Handling: Pull the temperature-sensitive switch probe from the bottom of the blind tube to a height of about 40mm, and turn off the power, and turn the multimeter to the maximum. A large number of resistance levels less than 7MΩ; then connect the two test leads to the heating tube shell and any power supply terminals respectively. If the cold insulation resistance is less than 7MΩ, the heating tube needs to be replaced.

　　Reason 2: The insulation performance of the heating pipe decreases (generally it will appear after a period of use), and its insulation resistance value is unstable. When the leakage current exceeds a certain value, the leakage protection plug will act immediately to deal with it: check and eliminate or replace the heating pipe.

　　Reason 3: There is leakage between other live components and the casing. Treatment: Check and eliminate or replace the components.

　　Reason 4: The leakage protection plug is in poor contact with the inferior socket, and malfunction occurs due to overheating. Treatment: Replace the socket.

　　Reason 5: Either the splash protection plug or the temperature-sensitive switch fails. Troubleshoot: Replace the temperature-sensitive switch or the leakage protection plug.

Read recommendations:

NTC thermistor used on power bank.Infrared IC wholesaler

Gold chip NTC thermistor

MF55 103F3950F NTC Thermistor 10K 1% 3950

traffic lens

PIR Lens 8120-4