GE Wall Oven – Randomly Displays “150° Probe” on Lower Oven Display – Troubleshooting Guide

Problem:

GE wall oven unexpectedly shows “150° Probe” on the lower oven display, even when no probe is inserted or no cooking cycle is active.

Possible Causes:

1. Faulty or shorted meat probe jack

2. Moisture or debris inside probe connector

3. Damaged or misaligned probe receptacle wiring

4. Software or control board glitch

5. Faulty main control board interpreting ghost probe signal

Tools Required:

• Screwdriver

• Multimeter

• Needle-nose pliers

• Rubbing alcohol + cotton swab

• Flashlight

Step-by-Step Procedure:

1. Power Cycle the Oven

• Turn off power at the breaker for 5 minutes.

• Restore power and monitor if the “150° Probe” display reappears.

• If problem is temporarily resolved, likely a control issue.

2. Inspect Meat Probe Jack

• Open the lower oven.

• Locate the probe receptacle inside the oven cavity (usually rear or side wall).

• Check for:

  • Debris

  • Moisture

  • Grease or food particles

• Clean with cotton swab and rubbing alcohol.

• Allow to dry completely.

3. Check for Phantom Probe Detection

• Some ovens detect a probe when the jack is physically damaged or shorted internally.

• Use a multimeter to test the two probe jack terminals for continuity:

  • With no probe inserted, there should be no continuity.

  • If there is continuity, the jack is internally shorted and must be replaced.

4. Disconnect Probe Wiring (Test)

• Turn off power to the oven.

• Remove oven from wall if necessary (2–4 screws usually at front frame).

• Access rear or top control compartment.

• Locate the probe wire harness going from the cavity to the control board.

• Disconnect the probe wiring harness.

• Restore power and check if “150° Probe” message disappears.

  • If yes, replace the probe jack assembly.

  • If not, suspect control board issue.

5. Check Control Board

• If the display still shows “150° Probe” with the jack disconnected, the control board may falsely interpret probe input.

• Inspect control board for:

  • Burn marks

  • Loose connections

  • Corroded pins

• Replace main control board if fault persists.

Notes:

• This fault can also intermittently occur after self-clean cycles due to thermal expansion affecting probe jack or wiring.

• Moisture in the cavity (from steaming/roasting) may also cause false detection until it evaporates.

Replace If Necessary:

• Probe jack assembly – if shorted or corroded

• Control board – if false signal persists with probe disconnected