I've had a similar issue with my Samsung dryer before, and it turned out to be a faulty heating element. It's possible that the thermal cut-off or thermostat is malfunctioning, preventing the dryer from producing heat. You should also check the power cord and ensure it's properly plugged in, as a loose connection can cause the heating issue. Additionally, make sure you're using the correct dryer settings, as some cycles don't use heat. If none of these solutions work, it might be worth checking the dryer's venting system for blockages or kinks, as this can also affect the heating performance.