GE Café Range Error Code F91: Wiring to Latch... | appliancefaults.com

Technical Background:

The F91 error code on a GE Café range indicates a problem with the oven door latch mechanism. The main control unit (MCU) monitors the state of the latch switch via low-voltage DC signals to determine if the door is properly locked. The MCU also controls a 120V AC motor that drives the latch. The F91 code is triggered when the MCU detects an unexpected or missing signal from the latch switch or motor.

Symptoms:

The oven displays an F91 error code and may be unable to start a self-clean cycle or any cooking function that requires the door to be locked. The door latch might attempt to engage but fail, or it might not move at all. The oven may be stuck in a locked state.

Possible Causes:

Faulty oven door latch switch.
Wiring harness issue between the latch and the main control board.
Defective main control board (MCU).
Obstruction preventing the latch from fully engaging.
Loose connection at the latch or control board.
Voltage supply issue to the latch motor.

Solution:

1

Disconnect power to the range at the breaker panel.
2

Locate the oven door latch mechanism (usually at the top of the oven cavity).
3

Inspect the wiring harness for any visible damage (burns, cuts, or loose connections).
4

Using a multimeter, check the continuity of the latch switch in both the open and closed positions. The expected reading should be close to 0 ohms when closed and infinite ohms when open.
5

Verify 120V AC power is reaching the latch motor when the oven is attempting to lock (use caution).
6

If the wiring and switch are good, suspect a faulty main control board (MCU). Replace the MCU following the manufacturer's instructions.
7

Reassemble the range and test the oven operation.

Safety Warning:

Disconnect power to the appliance at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures must be followed. High voltage (120V AC) is present in the appliance. Exercise extreme caution when testing live circuits.

Prevention:

Avoid slamming the oven door, which can damage the latch mechanism. Periodically inspect the latch area for debris and clean it as needed. Ensure the oven is level to prevent binding of the door latch.

Expert Tip:

Some GE ranges have a service mode that allows you to manually cycle the door latch. Consult the service manual for the specific sequence for your model. This can help isolate whether the issue is mechanical or electrical.

Frequently Asked Questions

•How do I access the main control board on my GE Café range?

The main control board is typically located behind the control panel at the top of the range. You'll need to remove the screws securing the control panel and carefully lift it to access the board. Be sure to disconnect power first.

•What voltage should I expect to see at the latch motor connector?

You should see 120V AC at the latch motor connector when the control board is attempting to lock or unlock the oven door. Use caution when testing live voltage.

•Where can I find the service manual for my specific GE Café range model?

You can often find the service manual online by searching for your model number followed by "service manual." GE also offers service manuals through their website or authorized parts distributors.

GE Café Range Error Code F91: Wiring to Latch Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the main control board on my GE Café range?

•What voltage should I expect to see at the latch motor connector?

•Where can I find the service manual for my specific GE Café range model?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: