This is a very common myth. But in fact, you really don't need to be heating your water all the time. ... Modern washing machines, dishwashers and electric showers take cold water and heat it themselves so you don't need a supply of hot water waiting for them in the tank.

Can you use washing machine if boiler not working?

When your boiler breaks you will also have to worry about heating the water, when it comes to dishwasher and washing machines they will heat the water internally, but you will need to get inventive for bathing when the hot water breaks down.

Do washing machines have their own heating element?

As Ecnerwal says, generally speaking washing machines do not have heaters, but take the hot from the hot water from the hot hose.