NOTE: Do not push one end at a time, which
could cause the opposite end to lift away from the
flange.
3. Re-tighten the hex screws.
4. Pull the door open only 0.25” (6 mm) and let
go of the handle.
The door must completely snap shut on its own. If
the door sticks and force is needed to finish closing
it, it is out of adjustment.
WARNING: Perform a microwave leakage test
(page 36) after adjusting the oven door.
Interlock Switches
The primary, secondary, and monitor interlock
switches engage and disengage in sequence to ensure
a proper seal. When the door is opened, the switch
sequence is P, S, M. The sequence is M, S, P as the
door is closed.
Adjusting the Primary, Secondary, and
Monitor Switches
WARNING: This procedure is performed
while the oven is hot. To avoid burns, be
careful when adjusting the switches.
Use the following procedure to adjust the primary,
secondary, and monitor switches. The primary
and secondary switches are located on the left side
hinge assembly and the monitor switch is located
on the right side hinge assembly. The primary and
secondary switches utilize an actuator (attached
to the door) and toggle assembly (attached to the
chassis) to engage (Figure 75). See page A-5 of the
Appendix for switch assembly detail.
1. Ensure the oven has been at operating
temperature for at least fifteen minutes.
2. If adjusting the primary or secondary switch,
confirm the latch toggle is in the correct
position.
a. Visually inspect the latch toggle position
and verify it is angled at no less than 85°
and no more than 90° in reference to the
front flange (oven face).
b. If the toggle is less than 85° or greater
than 90°, correct the toggle’s position by
installing a spacer/shim (the more distance
from the flange, the less angle on the
toggle):
• NGC-1169-1: Shim, 0.030” (0.762 mm)
• NGC-1169-2: Shim, 0.045” (1.143 mm)
c. Verify the position of the toggle by opening
and closing the oven door several times.
3. Adjust the switch(es):
a. Enter Test Mode (page 18).
b. Open the oven door and verify P and S
disengage before M.
c. Close the oven door and verify M engages
before S, and P.
d. If the switches do not engage or disengage
in sequence, close the door and adjust the
necessary switch(es) by loosening the two
#4-40 screws and #8-32 screw until the
proper sequence is achieved.
NOTE: The sequence of P in relation to S is not
important, rather, both P and S need to open before
M and close after M.
NOTE: DO NOT allow the switch paddle to
rest on the body of the switch in the closed door
position. The final adjustment requires a minimum
of a 0.030” (0.762 mm) gap to avoid over-travel
and bent/damaged switches.
NOTE: An over-rotated switch paddle can cause the
paddle to not engage the switch button properly.
Do not over-rotate the switch paddle.
4. Open and close the door several times to verify
the switch gap.
5. Perform a microwave leakage test (page 36).
Figure 75: Primary Switch Adjustment
OVEN SYSTEMS
35
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