Cavity Thermal Cutout (TCO)
The cavity TCO is located on the top of the microwave oven on the left side of the forward vent duct. The microwave oven shuts off when the temperature of the cavityTCO reaches 212°F (100°C).
The cavity TCO is a normally closed switch. An open reading across the TCO indicates an overtemperature condition or failed TCO. The cavity TCO is not resettable.
Removal
Remove the microwave (see Microwave Removal and Component Access).
Slide the cavity TCO from the two tabs and remove the 2 connectors.
Cavity TCO
Magnetron Thermal Cutout (TCO)
The magnetron TCO is located on the magnetron and shuts off when the magnetron temperature reaches 150°F (65.5°C).
The magnetron TCO is a normally closed switch. An open reading across the TCO indicates a failed TCO. The magnetron TCO is resetable
Removal
Remove the microwave (see Microwave Removal and Component Access). Disconnect the 2 wires and remove the screws from the magnetron TCO.
Fuses
The main and high voltage transformer fuses are located behind the hidden vent, above the control panel.
Removal
Remove the hidden vent (see Microwave Removal and Component Access).
Remove the grille to access the fuses.
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