What causes a Samsung dryer to stop working includes power issues, thermal fuse blown, door switch failure, control board failure, and vent blockage. Most common cause is no power, check circuit breaker as electric dryer needs 240 volts two breakers, one may trip, also check power cord and outlet. Second common is thermal fuse blown due to overheating from clogged lint filter or vent duct, dryer will not start or not heat, fix by cleaning vent and replacing fuse $20 part. Third is door switch failure, dryer thinks door open and will not start, error code dF or dE. Fourth is control board failure causing no power to components. Fifth is drive belt broken causing drum not to turn, dryer may still run but not tumble. Sixth is motor failure. Seventh is heating element failure causing dryer to run but not heat, clothes remain damp. Eighth is moisture sensor dirty. For Samsung dryer not starting, check power, door closed, child lock disabled, and press Start firmly. If not heating, clean vent and check heating element continuity. Always unplug before inspecting. Run diagnostic mode to see error codes like HE or tS.
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