Sub-Zero Slow Preheat / Partial Element Failure

Oven takes excessively long to preheat; may stall around 250–300°F.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

One of multiple elements not energizing (e.g., bake or broil), Weak or partially open bake element, Low line voltage, Failing relay on control board

How to Fix / Troubleshooting

Safety: Turn off power before testing components.

  • Observe element operation: During preheat, look through the door (if elements are visible) to see if both bake and broil elements glow. On some models, broil assists preheat.
  • Test elements: With power off, measure resistance of bake and broil elements. Replace any open or significantly out-of-spec elements.
  • Check voltage: Have a qualified person verify that the oven is receiving correct line voltage (typically 240 VAC).
  • Inspect control board: If an element never energizes despite being good, the corresponding relay on the control board may be faulty and require board replacement.
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Repair Difficulty

Medium 3/5

Required Part

Bake Heating Element
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