The glass section of the washing machine becomes at least warm if not hot during a hot water wash. You can feel the glass area with your hand when the procedure is going on to see if it is warm. If the glass section remains cold to your touch it definitely indicates a faulty heating element. Another sign of a faulty heating element is the non stopping wash process. Some times the washer refuses to go to the next cycle and continues the wash cycle till you stop it. This happens when the water does not acquire the pre set temperature.
If your washing machine does not heat the water during its wash cycle, it is likely to need some kind repair, a faulty water heater element is the most likely cause for this type of problem, here are a few checks that you can use that will indicate to you whether you have a likely faulty water heater element.