Lindberg Blue M Tube Furnaces - Furnace Thermocouple Replacement Instruction for Tube Furnaces

The document provides detailed instructions for replacing the thermocouple in Lindberg Blue M Tube Furnaces. It includes steps such as disconnecting the electrical power, removing the access panel, exposing the insulation and electrical compartment, removing the existing thermocouple assembly, noting the polarity and wire locations, inserting the new thermocouple, reconnecting the wires, reassembling the unit, and testing the furnace at a moderate temperature to ensure proper operation.