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What Does “F1” Mean on a Whirlpool Washer?

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The “F1” error code on a Whirlpool washer can be a source of confusion and frustration for many homeowners. But understanding what this error code means and how to troubleshoot it can save you time and potentially costly repair bills. In this comprehensive guide, we will explore the meaning of the “F1” error code, why it occurs, and how to fix it.


The “F1” error code on a Whirlpool Washer signifies a fault with the appliance control unit or associated wiring. This code typically appears when the control board has trouble sensing the water level, or if there are issues with the control board itself. It can be caused by a number of factors, including problems with the pressure switch hose, the appliance control unit, the main control board, inadequate voltage, or a defective central control unit/board.

What does the “F1” error code signify on a Whirlpool Washer?

The “F1” error code on a Whirlpool Washer signifies a fault with the appliance control unit or associated wiring. This fault code is typically displayed when the control board has trouble sensing the water level, or if there are issues with the control board itself.

Common Reasons for the “F1” Error Code

There are several common reasons why your Whirlpool Washer might display the “F1” error code. These include:

  • Difficulty in sensing the water level: This could be due to a problem with the pressure switch hose being disconnected or obstructed.
  • Issue with the appliance control unit (ACU) or associated wiring: This can be caused by a problem in the wiring or connectors, or an actual damage to the components of the ACU.
  • Problem with the main control board: This could be due to a short circuit, voltage surge, or a voltage drop in your household power network.
  • Inadequate voltage: If the voltage at the washer’s power source isn’t within the levels needed by the washer, the ACU can’t function properly, resulting in the F1 error.
  • Defective central control unit/board: Issues with the memory of the control board, damaged wire harness connections, or burnt/damaged elements in the control board can cause the F1 error.

Troubleshooting the “F1” Error Code

To troubleshoot the “F1” error code on your Whirlpool Washer, follow these steps:

  1. Reset the Washer: Unplug the washer from the power source, wait for one minute, and then plug it back in. This can help reset the control board and clear the error code.
  2. Check the pressure switch hose: Verify that it is properly connected and free of obstructions. If the hose is in good condition and the error code still appears, you may need to replace the main control board.
  3. Inspect the control board: Look for any signs of damage or loose wires. If the control board is damaged, it will need to be replaced.
  4. Check the wiring: If the control board is not damaged, check the wiring for any loose or damaged wires.

If the error code persists after trying the above steps, it is recommended to consult a qualified technician for further diagnosis and repair.

Preventing the “F1” Error Code

While the “F1” error code can sometimes be unavoidable, there are a few precautions you can take to prevent it from appearing:

  • Regularly service your washer to ensure it’s in good working condition.
  • Regularly check the water pressure in your boiler to ensure it’s within the recommended range.
  • Ensure the circulation pump is working properly.
  • Vent the central heating system to prevent overheating.
  • Check the NTC thermistor to ensure it’s functioning correctly.

Final Thoughts

The “F1” error code on a Whirlpool Washer can be a hassle, but with a little knowledge and effort, you can troubleshoot and potentially fix the issue yourself. However, if the problem persists, it’s always best to consult a professional to avoid damaging your washer further.

Frequently Asked Questions

How often should I service my Whirlpool Washer to prevent the “F1” error code?

It is generally recommended to service your washer at least once a year. However, if your washer is heavily used, you might consider servicing it more frequently.

What is the NTC thermistor and why is it important to check its functioning?

The NTC thermistor is a sensor that measures the temperature of water in your washer. If it isn’t functioning correctly, it can cause the control board to receive incorrect signals, which might lead to the “F1” error code.

The recommended range for water pressure in a boiler is typically between 1 to 1.5 bars. However, you should check the user manual of your specific model for precise information.

What is the role of the circulation pump in the washer?

The circulation pump in your washer is responsible for circulating water and detergent within the machine. If it’s not working properly, it can lead to issues with the water level, potentially triggering the “F1” error code.

How can I tell if the central control unit/board is defective?

Signs of a defective central control unit/board can include the washer not starting, not completing cycles, or displaying error codes such as “F1”. However, a professional diagnosis is often needed to definitively identify a faulty control unit/board.

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