Zline Runaway Temperature / Overheating

Oven overheats and burns food even at low set temperatures.

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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

Shorted oven temperature sensor, Stuck bake or broil relay on control board, Miswired power connections, Failed high-limit thermostat not opening

How to Fix / Troubleshooting

Safety first: Turn off power immediately if the oven overheats. Do not continue using the oven until the issue is resolved.

  • Step 1 – Test sensor: With power OFF, remove and test the oven temperature sensor. A shorted sensor will read very low resistance. Replace if out of spec.
  • Step 2 – Observe element behavior: With the oven powered and set to a low temperature, watch the elements. If they stay on continuously and do not cycle off, a relay may be stuck.
  • Step 3 – Inspect control board: Disconnect power, remove the control panel, and inspect the control board for welded or burnt relays. Replace the control board if a relay is stuck closed.
  • Step 4 – Verify wiring: Ensure the oven is wired correctly at the terminal block and junction box. Incorrect wiring can cause uncontrolled heating.

Warning: Overheating is a serious safety hazard. If you are not experienced with electrical diagnostics, contact a professional technician.

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Repair Difficulty

Hard 4/5

Required Part

Electronic Oven Control Board (EOC)
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