50 TROUBLESHOOTING
Troubleshooting:
F4: MONITOR (Door Monitor Defective)
NO
NO
Replace the F3 fuse.
Are the switches opening in
the correct sequence (P, S, M)
while the oven is hot? (Ensure
the oven has been at operating
temperature for at least fifteen
minutes.) To access Test Mode
or for info on status indicators,
see page 19.
Adjust the monitor safety switch.
See page 39 for instructions. Run
test cook cycles to verify proper
operation.
Troubleshooting:
F5: MAG TEMP (Magnetron Over Temperature)
NO
Verify wiring and check K7
fan relay operation (B-17
and C-16). If necessary,
replace the cooling fans.
Open the top cover, place the oven in
Test Mode, and test the magnetrons
(see page 19). Are the magnetron
cooling fans operating?
Correct wiring/
replace the
thermostats.
Remove the debris
or reposition the
oven away from
obstruction.
NO
NO
Do the magnetrons pass testing in the
Test Mode? See page 19.
NO
Is the airpath into the elec-
trical compartment blocked
or clogged with debris?
Check the cooling fan finger
guards and filter on the back
panel.
Verify wiring to magnetrons,
and verify magnetron ther-
mostats are not open. Are
wiring and thermostats okay?
Replace the magnetron(s) and
test again in Test Mode.
Replace
damaged
switch(es).
Run test cook cycles to verify
proper operation.
NO
Seat the connector
on the switch.
Is the 20-amp F3 fuse blown?
Is the connector to the monitor
switch properly seated?
NO
Are the switches
closing in the
correct sequence
(M, S, P)?
Are the
switches bent
or damaged?
NO
Fault message
should disappear.
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