Lincoln Service Parts 1 › Lincoln Electric 9SM21589 THERMAL TRIP PILOT LIGHT ASBLY AC-1500 M21589 Lincoln Electric 9SM21589 THERMAL TRIP PILOT LIGHT ASBLY AC-1500 M21589 Sale Price: $37.14 Original Price: $42.71 THERMAL TRIP PILOT LIGHT ASBLY AC-1500 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! THERMAL TRIP PILOT LIGHT ASBLY AC-1500 PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1