What This Error Means

F30 on a GE oven means the control board thinks the oven temperature sensor circuit is open (broken or unplugged).

In plain terms: the brain of the oven is not getting a signal from the temperature probe in the back wall, so it kills the heat and flashes F30.

Official Fix

What the manual wants you to do is simple: test the oven sensor circuit and replace the bad part.

  • Kill the power first. Flip the range/oven breaker off. No guessing. Make sure the display is dead.
  • Let it sit 2–3 minutes. This bleeds off any charge in the control board before you touch wiring.
  • Find the oven temperature sensor. Inside the oven, look at the back wall. Small metal probe sticking out, usually top-center or upper-left, held by two screws.
  • Pull the sensor out. Remove the two screws, gently pull the sensor toward you. There will be a wire and usually a plug connector behind the wall.
  • Disconnect the plug. Separate the sensor from the harness connector. Do not yank the wires; hold the plastic plug.
  • Check the connector and wires. Look for burnt plastic, melted insulation, or a loose pin. If the plug is obviously cooked, the sensor or harness is suspect.
  • Test the sensor with a multimeter. Set the meter to resistance (ohms). Touch one probe to each sensor pin/lead.
    • At room temperature, you want roughly 1,000–1,100 ohms.
    • If it reads open (OL, infinity, or no change), the sensor is bad.
    • If it is way off (like 200 ohms or 3,000+ ohms), the sensor is bad.
  • If the sensor is bad, replace it. Install a new GE-compatible oven temperature sensor, route the wires the same way, reconnect the plug, and reinstall the two screws.
  • If the sensor tests good, check the harness. With power still off, trace the harness from that connector back toward the control board (top/back of the range or behind the front panel on a wall oven).
    • Look for cuts, melted spots, or pinched sections.
    • If you see obvious damage, repair or replace that harness section.
  • Test the circuit at the control board. Access the control panel (remove the back cover or front trim, depending on model). Find the two sensor wires where they land on the board. Meter them there.
    • If you read the same 1,000–1,100 ohms there, the sensor and wiring are good.
    • If it reads open at the board but good at the sensor, the harness between is bad and needs repair/replacement.
  • If sensor and harness are good, the control board is bad. At that point the EOC (electronic oven control) is misreading the circuit and needs to be replaced.
  • Button it up and test. Reassemble panels, restore power at the breaker, clear the code, then run Bake at 350°F. If it heats normally with no F30, you are done.

The Technician’s Trick

Here is how a working tech shaves time and avoids throwing parts at it.

  • Quick power reset first. Flip the breaker off for 3–5 minutes, then back on. If F30 comes back immediately when you start Bake, it is almost never a glitch; move on to hardware.
  • Test from the board before yanking a wall oven. On built-in units, pull the top trim or control panel only, find the two sensor wires on the board, and ohm them there. If it is open at the board, you know you have either a bad sensor or a broken harness without dragging the whole oven out of the cabinet yet.
  • Jump it with a resistor for confirmation. If you have a 1k–1.1k ohm resistor, unplug the sensor wires from the board and clip the resistor in their place. If the oven now boots without F30, the board is fine and the sensor/harness is the problem.
  • Burnt connector? Cut it out. If the sensor plug is cooked but the wires and sensor ohm good, many techs just cut the plug off and join wires with high-temperature ceramic wire nuts instead of chasing a full harness.
  • No meter and you want fast? The temperature sensor is cheap compared to a service call. On an older but otherwise healthy oven, many homeowners just swap the sensor first; if F30 is still there, then look at the harness or board.

Is It Worth Fixing? (The Financial Verdict)

  • Fix: Oven under about 10–12 years old and you only need a sensor or harness; parts typically under a couple hundred and the job is straightforward.
  • Debatable: Oven 12–15 years old and you are looking at a control board plus sensor; add up parts and your time versus the price of a basic new unit.
  • Replace: Very old oven, rusted interior, other issues, and the control board alone costs close to half the price of a new range or wall oven.

Parts You Might Need

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See also

Chasing error codes on other gear too? These guides break down the common ones the same no-nonsense way: