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CHAPTER
Ill
SERVICING
TROUBLESHOOTING
GUIDE
men
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: United Kingdom and Australia Models.
If the oven becomes inoperative because
of a blown fuse in the lower latch-
monitor switch circuit, check the lower
latch switch and monitor switch before
replacing the fuse.
PROBLEM
POSSIBLE CAUSE
TEST PROCEDURE OR
CORRECTION
OFF CONDITION
Home fuse blows when power cord
is plugged into wall receptacle.
Shorted wire in power cord or wire harness.
Replace cord or check wiring.
Oven lamp doesnot light with door
opened.
(Timer is at "0" position.)
No power from service entrance.
Open wire in power cord or wire harness.
Blown fuse.
Check wall outlet.
Replace same or repair wiring.
Check for short circuit and
replace fuse.
Fan motor.does not operate.
Defective oven lamp.
Defective lower latch switch
Open or loose wire connection to the above
components.
Defective fan motor.
Open or loose wire connection.
Replace both oven Lamps.
Procedure 4.
Check wiring.
Procedure C on GENERAL.
Check wiring.
Microwave :
IDLE CONDITION
With the microwave tuner set, oven
lamp does not light.
Defective oven lamp
Defective timer contacts(7) - (8).
Open or loose wire connection.
Replace both oven lamps.
Procedure H on GENERAL .
Check wiring.
Fan motor
does not operate.
Defective fan motor.
I--- Open or loose wire connection.
Procedure C on GENERAL .
Check wiring.
Covection:
With tl re convection timer
n.-s+ a.,,
XL, uven lamp does not light.
Fan motor does not operate.
i
Defective oven lamp.
Defective timer contacts @ - @ .
Open or loose wire connection.
Defective fan motor.
Open or loose wire connection.
Replace both oven lamps.
Procedure H on GENERAL.
Check wiring.
Procedure C on GENERAL.
Check wiring.
19
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