Monitor Switch; Turntable Motor; Cooling Fan Motor - Frigidaire GLEB30M9FSA Service Data Sheet

MICROWAVE INFORMATION
DOOR SENSING AND PRIMARY INTERLOCK SWITCHES
The primary interlock switch is mounted in the lower position of the latch hook and the door sensing switch in the
secondary interlock system is mounted in the upper position of the latch hook. They are activated by the latch
heads on the door. When the door is opened, the switches interrupt the power to all high voltage components. A
cook cycle cannot take place until the door is firmly closed thereby activating both interlock switches. The
secondary interlock system consists of the door sensing switch and secondary interlock relay located on the
control circuit board.

MONITOR SWITCH

The monitor switch is activated (the contacts opened) by the latch head on the door while the door is closed. The
switch is intended to render the oven inoperative, by means of blowing the C/T fuse, when the contacts of the
secondary interlock relay (RY2) and primary interlock switch fail to open when the door is opened.
Functions:
1. When the door is opened, the monitor switch contact close (to the ON condition) due to their being normally
closed. At this time the secondary interlock relay (RY2) and primary interlock switch are in the OFF condition
(contacts open) due to their being normally open contact switches.
2. As the door goes to a closed position, the monitor switch contacts are first opened and then the door sensing
switch and the primary interlock switch contacts close. (On opening the door, each of these switches operate
inversely.)
3. If the door is opened, and the secondary interlock relay (RY2) and primary interlock switch contacts fail to
open, the C/T fuse blows simultaneously with closing of the monitor switch contacts.
CAUTION: BEFORE REPLACING A BLOWN C/T FUSE TEST THE DOOR SENSING SWITCH, SECONDARY
INTERLOCK RELAY (RY2), RELAY (RY1), PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER
OPERATION. (REFER TO CHAPTER "TEST PROCEDURE").
NOTE: C/T FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY.

TURNTABLE MOTOR

The turntable motor rotates the turntable located on the bottom of the oven cavity, so that the foods on the
turntable cook evenly during cooking. The turntable may turn in either direction.

COOLING FAN MOTOR

The cooling fan motor drives a blade which draws external cool air. This cool air is directed through the air vanes
surrounding the magnetron and cools the magnetron. This air is channeled through the oven cavity to remove
steam and vapors given off from the heating foods. It is then exhausted through the exhausting air vents at the
oven cavity.
CAVITY TEMPERATURE FUSE
The cavity temperature fuse located on the top of the oven cavity, is designed to prevent damage to the oven by
fire. If the food load is overcooked, by either error in cook time or defect in the control unit, the cavity
temperature fuse will open. Under normal operation, the cavity temperature fuse remains closed. However, when
abnormally high temperatures are reached within the oven cavity, the cavity temperature fuse will open at
302OF(150OC) causing the oven to shut down. NOTE: This is fuse. It does not reset.
DESCRIPTION AND FUNCTION OF COMPONENTS
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