Customer Questions and Answers for Microwave Time Delay Fuse by Lg

Abonelli, if the door switches tested properly when in the open and the closed state, the transformer 6170W1D052M (part has been discontinued) would need to be tested. The primary windings (terminals that do not go to the capacitor or microwave) should measure a resistance between 0.2-0.5 Ohms and the secondary windings should measure between 50-120 Ohms. If this tests good, and the windings do not have continuity to the metal frame of the transformer, the next step would be inspecting for any grounded wires or scorch marks on the main control EBR64419603. If this all checks good, the fuse 3B74133Q may have failed without an additional cause.