Model #79040529400 Kenmore built-in oven, electric

  • Control Panel
    3 Results
  • Body
    3 Results
  • Door
    3 Results
  • Wiring Diagram
    3 Results

Error Codes

Error Code:

Condition:

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Question and Answers

Q:

Can the control module on my Kenmore wall oven (79040529400) be tested for "good/bad" off of the unit?

A:

Since you know how to pull the oven out of the wall, I recommend shutting off the breaker and checking the wiring connections between the oven terminal block and the wires in the junction box. I you have the technical ability to safely check the voltage from the wires in the junction box, you can determine whether you have the proper 240 volt power supplied to the oven. In most home electrical systems, the black and red wires supply the L1 and L2 legs of voltage for the range. You should not check this live voltage unless you are completely confident in your technical ability to safely take this measurement using a volt/ohm meter. Contact an electrician or technician if necessary.

If the voltage supply to the oven is okay, you could have a failed safety thermostat that could interrupt the L2 leg of 240 volt power to the control board. The wiring diagram for your range is shown below. This diagram shows the safety thermostat in the L2 supply to the control board. The parts diagram is shown in the second image. The safety thermostat is Key 119 on this diagram. You can check this thermostat (with the electrical power to the oven disconnected) by removing at least one wire and measuring the resistance across the leads to the thermostat. If the thermostat is good, it will measure near zero ohms of resistance (continuity). If the thermostat is open (measures infinite resistance), then it is bad and will need to be replaced.

These diagnostic checks are normally performed by a technician before checking the control board. If all of these checks are okay, then the technician would verify L1 and L2 voltage going into the control board. If voltage into the control board is okay, then a bake cycle would need started and the L2 voltage out of the K4 relay would need to be checked. If this voltage is missing, then the control board is bad. If L2 voltage out of the K4 relay is okay, then the L1 voltage out of the K2 relay would need to be checked for the bake element. The broil element gets L1 voltage through the K1 relay. Since neither the bake nor broil element is heating, it would be more likely that you have a failed K4 relay. These tests would need to be performed by a service technician with the control board still installed in the oven. Since this diagnosis requires live voltage checks with the oven partially disassembled, I recommend calling a service technician to diagnose the control board. Live voltage checks are dangerous and can result in lethal electrical shock if not conducted properly.

If you need more help, resubmit your question with additional details.

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Lyle W -
Sears Technician
Q:

On the Kenmore wall oven 79040529400 can the rear thermostat be tested by disconnecting and bypassing it?

A:

For testing purposes, you can temporarily bypass this safety thermostat to see if this is causing your heating problem. This will not harm the control board or other components. Be sure that the oven is disconnected from electrical power (breakers shut off) before accessing and bypassing this component. Thoroughly insulate the connection with electrical tape so that the wires do not contact the cabinet ground of the oven. Once the test is finished, rewire the oven correctly. If the thermostat is bad, it will need to be replaced.

Read More
Lyle W -
Sears Technician

Recommended maintenance parts & accessories

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