Is it the problem, is it worth fixing and how?

I have had my Tricity bendix aw1400watt washing machine for over a year now. It is one that only has a cold water feed into the back (no hot) therefor i assume it has a heater inside...? Recently when pulling clothes out of the drum (supposedly washed) and they are freezing cold - as if they have been washed in cold water. Has the heater gone and is this easy to fix? It performs all usual functions correctly.

Please if i am being silly and the clothes should come out cold then please feel free to slate me but if there is problem please please help.

Sy J