The United States water heater does not heat up how?

1, did not install the line correctly. 2, the machine did not sense the normal water pressure. 3, the clogging of the water inlet pipe and shower. 4, the local voltage or water pressure is in a peak period of use, caused by instability. There is also a part of the inside of the heating body has burned out. Suggested solutions: 1, first of all, double-check the power plug is not plugged in, for leakage protection plug, need to observe the plug indicator is not bright, not bright means that the protection plug is damaged. 2, second, check the water heater line is not a bad contact, which contains the power line, heating line and temperature control line. 3, finally, look carefully at the heating indicator light is not bright! Usually there are two kinds of faults, one is light but not heating, the other is not light and not heating. If it is a long time after the use of this problem, it is possible to change the display is damaged, you need to replace the display with a new business can be. 4, to find a professional maintenance master to check the thermostat is not damaged, damaged, then simply replace the thermostat. Water heater heating indicator light does not light not heating test the water heater leakage protector is not damaged, whether the socket is charged, in the case of electricity, it is the leakage protector is bad, this time you need to find a professional maintenance personnel to replace the leakage protection plug can be.