How to Troubleshoot and Test a Kenmore Stove Warmer Zone Burner Element

ID: 221350

Description: [youtubevideo|qYXPErC9YUo]Use this guide to...

Steps:

  1. Turn every burner control off and let the glass cooktop cool completely.
  2. Disconnect power before touching any wiring, because the warmer-zone circuit uses 120 V.
  3. Unplug the stove from the wall.
  4. If the stove is hardwired, switch off the breaker and verify that the power is off before touching wiring.
  5. Do not use a resistance or continuity setting on a powered circuit.
  6. Wear work gloves when handling glass panels or sheet metal.
  7. Remove the glass cooktop enough to reach the warmer-zone burner terminals.
  8. Open the control area enough to reach the back of the warmer-zone switch.
  9. Use a model-specific disassembly procedure if the panels, screws, or clips differ on your stove.
  10. Record the wire locations before disconnecting anything.
  11. Pull connectors by the terminals, not by the wires, to avoid damaging the wiring.
  12. Use this burner-terminal layout from left to right: element terminal, temperature-switch terminal, temperature-switch terminal, element terminal.
  13. The two outside terminals connect to the warmer-zone element winding.
  14. The element winding uses 120 V, not 240 V.
  15. The two center terminals connect to the built-in temperature switch.
  16. At room temperature, the temperature switch is open.
  17. Use the temperature switch to understand the indicator circuit.
  18. One temperature-switch terminal carries constant 120 V whenever the stove is powered.
  19. That terminal stays powered whether the warmer-zone control is on or off.
  20. When the element heats up, the temperature switch closes.
  21. The closed switch sends voltage back through the other center wire for the warm-burner indicator circuit.
  22. Treat the center temperature-switch wires as live any time the stove is connected to power.
  23. Use this switch layout: black hot feed, white neutral feed, purple burner outputs, and purple indicator jumper.
  24. The black and white wires bring 120 V into the warmer-zone switch.
  25. The black wire is hot and the white wire is neutral.
  26. One neutral wire jumps to the indicator light.
  27. When the switch is on, 120 V leaves the switch on the two purple wires that feed the warmer-zone element.
  28. Use the warmer-zone indicator to tell whether the surface is still hot.
  29. The same light works as both the element-on indicator and the warm-burner indicator.
  30. When the switch is on, the switch terminal feeds the purple jumper and turns the light on.
  31. When the switch is off, that switch terminal is no longer powered.
  32. If the burner is still warm, the closed temperature switch feeds the purple jumper and keeps the light on.
  33. A warm indicator light can stay on after the control is off because the glass surface is still hot.
  34. Confirm that the stove is unplugged.
  35. Set a multimeter to ohms or continuity.
  36. Use the ohms reading for diagnosis, not a powered voltage test.
  37. Keep the meter leads away from any live circuit.
  38. Place one multimeter lead on each of the two purple wires that go to the warmer-zone burner element.
  39. Read the resistance on the meter.
  40. A good warmer-zone element measured about 134 ohms in this circuit.
  41. The exact reading can vary by model, but the meter should show a steady resistance instead of OL.
  42. Use this troubleshooting flow: no heat → unplug the stove → set the meter to ohms → test across the two purple burner wires.
  43. If the meter reads near 134 ohms and the burner still does not heat, the element is good and the warmer-zone switch is faulty.
  44. Replace the warmer-zone switch if the element has a good ohm reading but never turns on.
  45. If the meter reads OL, the warmer-zone element circuit is open.
  46. Replace the warmer-zone burner element if the meter reads OL.
  47. Keep the stove unplugged and the warmer-zone switch accessible.
  48. Identify the black and white 120 V input wires and the two purple output wires from the wiring diagram or your recorded wire positions.
  49. Check continuity from the switch input side to each matching purple output with the control set to Off.
  50. The switch output should read OL with the control off.
  51. Turn the control on and check the same input-to-output paths.
  52. The switch output should change from OL to continuity with the control on.
  53. Replace the warmer-zone switch if the output stays OL when on and the element reading is good.
  54. Do not guess at switch terminals if the wire colors or layout do not match this circuit.
  55. Install a matching warmer-zone burner element if the element reads OL.
  56. Install a matching warmer-zone switch if the element reads near 134 ohms but the switch does not send continuity to the purple output wires.
  57. Move only one wire at a time from the old component to the new component, or use your recorded wire locations.
  58. Make sure each connector seats firmly on its terminal.
  59. Reinstall all panels and secure the glass cooktop before applying power.
  60. Restore power only after the cooktop and control area are fully reassembled.
  61. Use an infrared thermometer to compare the surface temperature if the burner heats but seems weak.
  62. On low, the surface may read about 106 to 110 °F after about nine minutes.
  63. Switch the warmer zone to high only if the low setting responds normally.
  64. On high, the hottest area may read around 320 °F.
  65. The warmer zone runs much cooler than a regular surface element and may not glow red.
  66. Do not touch the glass, because the warmer zone can still burn skin even when it does not glow.
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