Lincoln Service Parts 1 › Lincoln Electric 9SM26138 AUX. TRANSFORMER THERMOSTAT ASBLY M26138 Lincoln Electric 9SM26138 AUX. TRANSFORMER THERMOSTAT ASBLY M26138 Sale Price: $977.11 Original Price: $1,123.68 AUX. TRANSFORMER THERMOSTAT ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! AUX. TRANSFORMER THERMOSTAT ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1