I am so incredibly disappointed with Samsung, and wish I read some of these reviews earlier. I've relied on Consumer Reports in the past and don't understand how Samsung dryers are rated so highly. My last dryer lasted nearly 20 years. My brand new Samsung dryer made it 2 months before having the same issue that you and many others have described. I'll never buy another Samsung product again, and will warn family and friends not to either, I just wish I hadn't invested $1200+ in a new washer and dryer that I'll likely need to replace in the next couple of years.
7 screws to replace heating element. New one could be burned out. VOM test for contunity after you pull the wires. Remember blue is bottom red is bottom not that it matters but just make sure you re wire back to mfg condition.
Wire connector must be tight and may need a little squeeze to get them tight.
Pull the blower lint screen cover 3 screws. Clean the blower motor vains and clean out the lint.
You could have a partial block.
Clean Clean Clean every thing that has lint.