CHAPTER III
SERVICING
TROUBLESHOOTING GUIDE
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 number which will be found in the “Test
Procedure and Adjustment” section on GENERAL or this
service manual.
IMPORTANT: If the oven door could not be opened
because of the function of monitor device,
check the cook switch and replace it if
necessary.
PROBLEM
POSSIBLE CAUSE
TEST PROCEDURE OR
CORRECTION
OFF CONDITION
Line fuse blows when power cord is
plugged into wall receptacle.
Shorted wire in power cord or wire harness. Replace cord or check wiring.
Oven light does not light with door
opened.
No power from service entrance. Check wall outlet
(Timer is at “0” position and main
switch is turned on.)
Open wire in power cord or wire harness.
Defective main switch.
(South African and Continental Europe models
only)
Replace same or repair wiring.
Replace.
Blown fuse. Check for short circuit and replace
fuse.
Defective noise filter.
(South African and Continental Europe models
only)
Replace.
Defective oven therm0 cut-out.
Defective magnetron therm0 cut-out.
Defective oven light.
Defective secondary interlock switch
(lower latch switch).
Procedure 5.
Procedure 5.
Replace.
Procedure 4.
Open or loose wire connection to the above
components.
Check wiring.
Fan motor does not rotate, but oven
light lights.
Defective fan motor.
Replace.
Open or loose wire connector to the fan motor.
IDLE CONDITION
--
Check wiring.
With the timer set and door closed,
oven light does not light.
Defective timer contacts.
Open or loose wire connection.
Procedure H on GENERAL.
Check wiring.
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