Figuring out which fuse is blown

• If the cold head does not run at all then both fuses are blown, remove right panel
• If one fuse is blown then the cold head will ratchet, remove the right panel
• If the fans are not running then one of the big fuses are blown, remove the left panel
• In most cases you will need a DVM to check to see if the fuse is blown, start with left panel

Replace the Fan Fuse with one of the correct type.

The fuses are located on the Electrical control box as seen here in this picture. The control box is the bronze mesh box and
fuses F7 and F8 are seen at the left end of the box. These are the fan fuses and have been most likely to blow.

Closer image with the F7 fuse unscrewed for replacement

M600 Electrical Wiring Diagram