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5.1.2 Door Lock Mechanism
The door lock mechanism is a bimetal operated door looking system that is used to ensure the
oven door is mechanically locked and cannot be opened while the oven is in the self clean mode.
5.1.2.1 Principles of Operation
When the oven is switched to the self-clean mode, the main control board on the oven will verify
via the door lock microswitch (figure 1), that the door is closed.
Figure 1
Satisfied that the door is closed, a voltage will be supplied by the PCB via contacts 3 and 4 to a
small PTC heating device mounted on the door lock (figure 2). This will heat up and cause the
bimetallic contact arm to mechanically push the latch mechanism into the lock position and close
the oven door latch switch (contacts 33 and 34) and lock the door latch in the closed position.
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