Jenn-Air JMC2427IM Fiche Technique page 13

FAILURE ERROR LIKELY FAILURE CONDITION
F4 E8 Inverter Over Temperature
SUGGESTED CORRECTIVE ACTION PROCEDURE
NOTE: Before starting any test, cycle power to the oven (power Off, wait 10
seconds, and then power On). After powering on, be sure that a load, such as
a microwave-safe cup of water, is present in the microwave oven cavity, and
start a microwave cooking function. Wait 1 minute, and then verify that the
failure happens again.
1. Unplug oven or disconnect power.
2.
Check the following:
a. Cooling fan connection for any loose connectors.
b. Oven installation and make sure there is no air blockage at the
bottom vent.
3. Reassemble all parts and panels before operating.
4. Plug in oven or reconnect power.
5. To check if the cooling fan is stalled, be sure that a load, such as a
microwave-safe cup of water, is present in the microwave oven cavity,
and start a cooking function in the microwave oven. Make sure the fan is
running. If it is not, unplug oven or disconnect power, replace the fan and
go to Step 8. If it is, go to Step 6.
6. Unplug oven or disconnect power.
7. Replace the inverter board.
8.
Reassemble all parts and panels before operating.
9. Plug in oven or reconnect power.
10. Verify operation is normal. Enter the Diagnostics Menu, select "Error
Diagnostics," and clear the history.
FAILURE ERROR LIKELY FAILURE CONDITION
F4 E9 Inverter and Magnetron Over Temperature
SUGGESTED CORRECTIVE ACTION PROCEDURE
NOTE: Before starting any test, cycle power to the oven (power Off, wait 10
seconds, and then power On). After powering on, be sure that a load, such as
a microwave-safe cup of water, is present in the microwave oven cavity, and
start a microwave cooking function. Wait 1 minute, and then verify that the
failure happens again.
1. Unplug oven or disconnect power.
2.
Check the following:
a. Cooling fan connection for any loose connectors.
b. Oven installation and make sure there is no air blockage at the
bottom vent.
3. Reassemble all parts and panels before operating.
4. Plug in oven or reconnect power.
5. To check if the cooling fan is stalled, be sure that a load, such as a
microwave-safe cup of water, is present in the microwave oven cavity,
and start a cooking function in the microwave oven. Make sure the fan is
running. If it is not, unplug oven or disconnect power, replace the fan and
go to Step 8. If it is, go to Step 6.
6. Unplug oven or disconnect power.
7. Replace the Magnetron and the inverter board.
8.
Reassemble all parts and panels before operating.
9. Plug in oven or reconnect power.
10. Verify operation is normal. Enter the Diagnostics Menu, select "Error
Diagnostics," and clear the history.
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