Frigidaire Oven Error Code F45: Internal Control Error... | appliancefaults.com

Technical Background:

The F45 error code on a Frigidaire oven typically indicates an internal control error within the main control unit (MCU). The MCU manages the oven's functions, including temperature control, timing, and display. This error can stem from voltage fluctuations, component failures on the board, or software glitches. The voltage paths for the MCU include 120V AC for power and various low-voltage DC signals for sensor inputs and relay control.

Symptoms:

The homeowner reports that the oven displays error code F45 and is not functioning. The display might be flashing, or the oven might be unresponsive to commands.

Possible Causes:

Faulty oven control board (MCU).
Loose wiring connections to the control board.
Power surge or brownout affecting the control board.
Software glitch within the control board’s firmware.
Failure of a component on the control board.
Short circuit in a connected component (e.g., temperature sensor).

Solution:

1

Disconnect power to the oven at the breaker panel.
2

Locate the oven control board (MCU), usually behind the control panel. This requires removing screws with a 1/4-inch nut driver or Phillips head screwdriver.
3

Inspect wiring connections to the control board for looseness or damage. Secure any loose connections.
4

Using a multimeter, verify 120V AC power is reaching the control board at the designated input terminals when the breaker is on.
5

If power is present and connections are secure, try resetting the control board by disconnecting the ribbon cable for 5 minutes, then reconnecting.
6

Restore power at the breaker panel and monitor the oven. If the error persists, the control board likely needs replacement.
7

If replacing the control board, ensure the new board is the correct part number for your model and carefully follow the system instructions.

Safety Warning:

Always disconnect power to the oven at the breaker panel before attempting any repairs. High voltage is present inside the oven, and contact can result in serious injury or death. Follow Lock-Out/Tag-Out (LOTO) procedures.

Prevention:

Use a surge protector to protect the oven from power surges. Periodically inspect the wiring connections to the oven for looseness or damage.

Expert Tip:

Some Frigidaire ovens have a service mode. To access it, simultaneously press and hold the Bake and Broil buttons for 5 seconds. This can provide more detailed error codes or allow you to run diagnostic tests.

Frequently Asked Questions

•How do I determine the correct replacement part number for my oven control board?

The part number is usually printed on a sticker or label on the existing control board. You can also find it in the oven's service manual or by contacting Frigidaire customer support with your model number.

•What tools are required to replace the oven control board?

You'll typically need a 1/4-inch nut driver, a Phillips head screwdriver, a multimeter, and possibly a pair of needle-nose pliers to disconnect wire connectors. A voltage tester is also recommended for safety.

•Is it possible to repair the control board instead of replacing it?

While possible, repairing the control board requires advanced electronics knowledge and specialized equipment. It's generally more cost-effective and reliable to replace the entire control board unless you have the necessary expertise.

Frigidaire Oven Error Code F45: Internal Control Error Reset Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I determine the correct replacement part number for my oven control board?

•What tools are required to replace the oven control board?

•Is it possible to repair the control board instead of replacing it?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: