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I don’t have a multimeter though
Any multimeter will be good enough for this. Cheap ones will probably be inaccurate but good enough for this.
and it’s been some time since I’ve used one.
Shove the dial to ohms. Check the probes read 0ish when directly connected. Test across heating element.
Have you done this?
Not a tumble drier and not a Samsung but a Bosch washing machine and a Siemens dishwasher.
I did cut myself on some sharp metal on the dishwasher. Dishwasher are a lot harder to service IMO.
It's probably the heating element. Take it apart, disconnect the element and measure the resistance with a multimeter. It should be tens of ohms but will probably be off the scale. The other failure mode is it goes short circuit but that tends to trip your RCD. Buy new element online. Fit.
There are loads of videos online that show you how to do this. Your exact model probably isn't available but likely one that is similar enough that you can follow it.