Product review (5 stars): Dryer nice and hot, drys like a champ again!
The Internet is pretty skimpy about how to fix my Samsung DV330AGW/XAA gas dryer. Basically it would spin a long time on auto dry (like 4 hours) and it only got warm but never hot. No error code displayed. I cleaned the lint exhaust but did not help.

Apparently this high-limit Thermostat is what controls the max heat  and can get damaged if the exhaust clogs with lint or just over time (in my case 5 years).

Replacing this takes about an hour. I performed the maintenance while it was still stacked on top of the washer. Two screws hold in the top lid. Take that off, pop out the control panel. Remove the two screws for the front door. Remove the 10-15 screws holding in the front metal panel. Remember to unplug the door open sensor on top. Once the front panel is taken off, the Thermostat is located on the lower right bottom of the dryer,  on top of the burner tunnel unit. It is held in with two Philips screws, take one out and loosen the other. The Thermostat pops right out. This was also a good time for me to replace the metal sensor drying bars on the lint filter hosting. Reverse removal for reassembly. Run on high heat for 20 minutes. I touch the exhaust pipe to confirm heat and it was so hot I could not hold my hand on the hose for longer than a few seconds. Before it was only warm but never hot like when it was new.

This totally fixed the problem I had with it not drying my clothes due to lack of heat. Like having a brand new dryer. I highly recommend it.