40 TROUBLESHOOTING
Troubleshooting:
F4: MONITOR (Door Monitor Defective)
NO
YES
NO
Replace the F3 fuse.
YES
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 25 for instructions. From
the cooling down or off screen, press
and hold the i key for 5 seconds to
reset the oven. Doing so should clear
the fault message.
Troubleshooting:
F5: MAG TEMP (Magnetron Over Temperature)
NO
YES
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.
YES
Remove the debris
or reposition the
oven away from
obstruction.
YES
NO
NO
YES
Do the magnetrons pass testing in the
Test Mode? See page 19.
NO
Is the airpath into the electri-
cal compartment blocked or
clogged with debris? Check
the cooling fan finger guards
and filter on the back panel.
YES
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).
From the cooling down or off screen,
press and hold the i key for 5 seconds to
reset the oven. Doing so should clear the
fault message.
NO
Seat the connector on
the switch.
YES
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?
YES
NO
Fault message
should disappear.
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