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How to Test an Oven Selector Switch

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If the oven selector switch is a suspect in creating problems in your oven or range, you can follow the steps below to test the switch.

  1. 1 Take precaution: Turn off the power source by putting the control panel switch at OFF position or pulling out the fuse for the range. Unplug the power cord if there is any. Be absolutely sure that the range is not getting power by turning ON the switches for each heating element. With the power OFF and the switches of the elements ON, wait for about three minutes. Put your hand close to the heating elements; avoid touching the heating elements. You should not feel any heat if the power is OFF. Turn the switches at OFF position.
  2. 2 Access control panel: If there is not enough working space at the back side of the range, make space by pulling away the range from the wall. Be careful so that you do not damage the floor or the furniture. Switches are generally mounted at the back side of the range. Remove the screws from the back panel; make sure the back panel does not fall out. Remove the back panel using hands; be sure not to strain any wires.
  3. 3 Locate the suspected oven selector switch: The oven selector will be located behind the switch knob. The oven selector switch has at least four terminals, one pair for the baking element and the other pair for the broiling element. Use the wire diagram to identify the correct terminals. Label the wires and the terminals for future reference. If you have a digital camera, take a close-up picture of the wire-terminal connections.
  4. 4 Test oven selector switch visually: Check the suspected oven selector switch visually. If the terminals are burned or damaged, the switch needs to be replaced.
  5. 5 Test oven selector switch: Disconnect the wires for the baking element. Turn power OFF and make sure the power is absolutely off. Set the VOM (volt-ohm-meter) for checking continuity (RX1). Set the switch for baking. Touch the probes of VOM at two terminals for baking element. Now, disconnect the wires for the broiling element and set the switch for broiling. Touch the probes of VOM at two terminals for broiling element. If either of the two the tests fail to show continuity, the oven selector switch is bad. You need to replace it in this case.
  6. 6 Put all disconnected parts back in place: With power OFF, put all the wires and parts back to their original positions. If you opened the bad switch for testing, you may keep it disconnected for helping you in buying a new one.