If it does not show a reading it means the heating element is faulty. A professional make use of the ohmmeter to read across both terminals once more and the earth terminal on the element. Here however, a positive reading means a faulty heating element while a negative reading mean no fault with the heating element. This is not a job for the average person. If you are not well versed with electronics don't even consider experimenting.
There are a few ways to tell if the water heater element in your washing machine might not be working and only one way to know for sure, I will go over some of the ways you can use to tell if your washing machine water heater element might not be working and also explain the 1 method you can use to to tell for sure if your element has developed a fault or not.