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Checking The Microwave Power Output - KitchenAid KHMS105E Service Manual

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Microwave Oven Hood Combo Service Manual — LIT 4317216
PROBLEM
Console will not display data,
or has incorrect data.
Erratic console display dur-
ing operation.
Display continues to count
down when door is open dur-
ing a "Cook" cycle.
O v e n o p e r a t e s w i t h o u t a
"Start" command.

CHECKING THE MICROWAVE POWER OUTPUT

Use the following procedure to checkout the
operation of the microwave oven.
1.
Fill a 1-cup (260 ml) glass measuring cup
with warm water (between 90˚F/32˚C and
100˚F/38˚C).
2.
Open the oven door, place the container
of water into the oven, and close the door.
3.
Press the COOK keypad, and set the
cooking time for 4-minutes.
POSSIBLE CAUSE
1.
No power at wall plug.
2.
Open line fuse.
3.
Thermal fuse.
4.
Thermal fuse on magne-
tron.
5.
Interlock safety switches.
6.
Control board.
1.
Magnetron.
1.
Secondary interlock
switch.
2.
Control board.
1.
Defective control board.
4.
5.
3-15
TEST PROCEDURE
OR CORRECTION
1.
Check fuse or breaker
box.
2.
Replace line fuse.
3.
Check thermal fuse.
4.
Check magnetron ther-
mal fuse.
5.
Check interlock safety
switches. Replace, if de-
fective.
6.
Check control board.
1.
Check magnetron.
1.
Check secondary inter-
lock switch. Replace, if
defective.
2.
Check control board.
1.
Replace control board.
Press the START/ENTER keypad. The
oven cavity light should come on, the
cooking cycle should begin, and the timer
should count down in "seconds" from 4:00.
After approximately 2-
the water should start to boil. If more than
3-minutes is required, it could mean that
the operating voltage is low, (below 110-
volts), or it is not functioning properly and
may need to be checked by a qualified
technician.
Original 03/97
Page 3-15
1
/
to 3-minutes,
2

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