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When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the
checks. Many of the possible causes of trouble will require that a specific test be performed. These tests are
given a procedure letter which will be found in the "Test Procedure" section.
IMPORTANT: If the oven becomes inoperative because of a blown fuse F1. Check the monitored latch
switch and monitor switch before replacing the F8A fuse.
TEST PROCEDURE
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
PROBLEM
CONDITION
Home fuse blows when power cord is
plugged into wall outlet.
"88:88"does not operate in display
when power cord is plugged into wall
outlet.
Display does not operate properly
when STOP button is touched.
OFF
CONDITION
Oven lamp does not light, when door
is opened. (Display operates).
Oven does not start when START
button is touched.(Display operates).
Fan motor does not operate (Oven
lamp lights).
Turntable motor assembly does not
operate (Oven lamp lights).
Oven or electrical parts does not stop
when timer knob is at "0" or STOP
button is touched.
Display operates properly but all
electrical parts do not operate.
COOKING
Oven goes into cook cycle but shuts
CONDITION
down before end of cooking cycle.
Oven seems to be operating but little
or no heat is produced in oven load
(Microwave power control is set at
HIGH).
Oven does not seem to be operating
properly during variable cooking
condition(Oven operates properly at
HIGH).
Fuse F8A blows (F2)
SOI 05.06 FV
TROUBLESHOOTING CHART
A B C
D E E E F F G H I
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599 36 78-44
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