Troubleshooting Electronic Oven Controls - Electrolux 30” GAS FREESTANDING RANGES Service Update Manual

TROUBLESHOOTING ELECTRONIC OVEN CONTROLS

When an oven with an electronic control detects a failure condition, it usually signals the failure with
an "F" code. These "F" codes are considered by many people to be an indicator as to positively which
part in the circuit has failed ("F1" a defective control, "F3" a defective oven probe, and so on). To the
embarrassment of many servicemen who have believed this, they have installed the indicated part
only to fi nd it did not correct the problem.
To troubleshoot an oven with an electronic oven control that is not operating:
1. Make sure electrical power is being supply to the control. Verify this by testing the voltage
at the control wiring harness.
2. Disconnect power for 30 seconds. If fault returns when power is reconnected continue with
the following steps.
3. Remove electrical power.
4, Go to the back of the control and disconnect the multi-pin plug.
5. Check the wiring diagram to determine which two pins in the plug (not on the EOC) are
connected to the oven sensor.
6. With an Ohmmeter check the resistance between the two pins in the plug that are connected
to the of sensor. At room temperature:
• If the meter reads below 900 Ohms or above 1200 Ohms, remove the sensor from the
oven an check it for resistance. If the resistance of the sensor is the same as reading
at the plug, the sensor is defective. Replace the sensor and test operation
• If the resistance of the sensor reads between 900 & 1200, the wiring between the
control and the sensor is defective. Repair or replace wiring and test operation.
•If the meter reads between 900 Ohms & 1200 Ohms check the resistance between one
of the pins going to the sensor and chassis. If the meter reads infi nity go to step 4. If
the meter shows continuity, remove the sensor and check from one of its pins to the
case of the sensor. If the meter reads continuity, the sensor is defective. If the meter
reads infi nity, the wiring between the control and the sensor is shorted to chassis of the
range.
• From the wiring diagram, determine which wires in the plug is from the door lock switch or
switches. From the diagram determine which of the switches are open or closed when the door
in the unlocked position. With an Ohmmeter check to see if the switch that is shown open is
open and the switch that is shown closed is closed by checking the proper pins in the plug.
7. If the above checks test good and the relay on the board for the selected function is not
closing replace the control.
IMPORTANT: If the oven problem is intermittent you must do the above test when the
oven is malfunctioning.
STEP 1
STEP 2
STEP 3
STEP 4
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