Lindberg-Blue M 1700C Box Furnace Models BF51634 and BF51664 - Door Vestibule Insulation Replacement Instructions

To replace the door vestibule insulation on Lindberg-Blue M 1700C Box Furnace Models BF51634 and BF51664, first disconnect the electrical supply. Open the door and identify the exterior chamber insulation panel held by four 'Z-shaped' brackets. Remove these brackets and insulation. Support the side and top insulation pieces, slide out the bottom insulation, and then remove the sides and bottom pieces. Reverse these steps to install the new insulation.