36 TROUBLESHOOTING
Troubleshooting:
F4: MONITOR (Door Monitor Defective)
NO
YES
Is the F3 fuse blown?
YES
Replace the F3 fuse.
NO
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 14.
Adjust the monitor safety switch.
See page 21 for instructions. From
the cooling down or off screen, press
and hold the Info key for 5 seconds
to reset the oven. Doing so should
clear the fault message.
Troubleshooting:
F5: MAG TEMP (Magnetron Over Temperature)
NO
YES
Fault message
should disappear.
NO
Replace the control board.
Verify wiring and check K2
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 14). Are the magnetron
cooling fans operating?
Correct wiring/
replace the
thermostats.
NO
YES
Are the switches
closing in the
correct sequence
(M, S, P)?
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 14.
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 ok?
Replace the magnetron(s) and test again
in Test Mode. Do the magnetrons pass
testing?
YES
Replace damaged
switch(es).
From the cooling down or off
screen, press and hold the Info key
for 5 seconds to reset the oven.
Doing so should clear the fault
message.
Are the
switches bent
or damaged?
YES
NO
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