Alltemp Universal 19-LS2-180 Dryer High Limit Thermostat. This thermostat has a limit of 180°F. It will turn the heating element back on when the temperature drops by 20°F. This thermostat has 2 terminals. The high limit thermostat shuts off the heating element when the dryer overheats.

Possible Repair Solution For:
Not drying properly, will not start, no heat, not enough heat, too hot, drying ends too soon.

Please Note: This is intended as a guideline only, as other items can cause the same symptoms. 

This part is also known as an operating thermostat, high limit switch, L180-20F.