How to Fix the Whirlpool Washer F20 Error

The Whirlpool washer F20 error code indicates that there is insufficient water supply due to a problem with the water intake system. This type of issue may also be displayed as an HF error code, and will happen to Maytag models along with Whirlpool. You may notice that the washer does not fill properly, cannot detect the presence of water, or can not run a cycle. This error is often displayed when the water supply to the washer has been switched off or when there is a faulty part in the water intake system. This washer guide will help you better understand the reasons behind this error code and guide you, step-by-step, through the troubleshooting process. By the end of this guide, you'll be armed with the knowledge and confidence to restore the flow of water in your washer and clear the F20/HF error code.

Causes of the Whirlpool or Maytag Washer F20/HF Error and How to Fix Them

• For your safety, always unplug your washing machine, and shut off the water supply valves before starting any maintenance or repair.
• If you’re disconnecting the washer or changing the hoses, always turn off the water supply first to prevent any water spillage or leaks.
• After turning the water supply back on, it's a good idea to check for any leaks at the connection points on the washer and the wall.

Control Board Glitch

The control board manages and interprets signals from all of the washer's sensors and components. If it malfunctions, it could misinterpret signals from the water intake system or fail to activate components correctly, resulting in an F20 error. To clear a glitch on your Whirlpool or Maytag washer you can reset it using any of the following methods:

• Press the Pause/Start button twice in quick succession.
• Soft Rest: Unplug the washer from the power outlet and wait 1-3 minutes before plugging it back in.
• Hard Reset: Turn the washer off at the circuit breaker and wait 3 - 5 minutes before turning it on again.

Either one of these methods should allow you to reset your washer. To receive more detailed instructions on resetting your washer, check out our resetting a whirlpool washer guide. However, if the problem persists then you will need to move on to troubleshooting the washer in order to clear the F20 code.

Using Incorrect Detergent

Using Incorrect Detergent: Your Whirlpool or Maytag washer requires the use of the correct amount of a High-Efficiency detergent. Using a non-HE detergent or using excessive amounts of detergent can create too many suds inside the washer. These suds can interfere with the machine's ability to gauge the water level, thereby causing an F20 error.

1. If your washer is filled with soapy water first select the "Drain & Spin" cycle to remove the soapy water. This might need to be done a couple of times to ensure all the suds and soapy water are cleared out.
2. If your model does not have this option, simply run a rinse cycle instead, to remove the water. It is recommended to add a cup of white vinegar to the rinse cycle, as vinegar can help break down the suds.
3. Once you have cleaned the suds, use a soft cloth to wipe the interior of the drum and ensure that no soap residues remain.
4. Run a short cycle without detergent and confirm that the F20 error has been resolved.

Disconnected Water Supply

Water supply hoses bring water from your home's plumbing into the washing machine. If the water supply is completely disconnected or not turned on, the washer won't receive the water it needs, leading to the F20 error due to the lack of water.

1. Locate the two water supply valves behind the washer: one for hot water (often colored red) and one for cold water (often colored blue).
2. Switch on the water supply by turning each valve counterclockwise until it's fully open.
3. If you are still experiencing issues with the water supply, confirm there aren’t any public water works or other external factors that may be affecting the water supply.

Low Water Pressure Levels

If the water pressure to your home or specifically to your washer is too low, it might not fill up quickly enough to satisfy the washer's sensors. The machine's sensors will detect the lack of timely filling and trigger the F20 error in response.

1. You can test your home's water pressure using a gauge. Attach it to a water source, and turn the water on.
2. The gauge will provide a reading in psi (pounds per square inch). A typical home water pressure is around 50 to 70 psi. If your reading is significantly lower, you may have a problem with your home's water supply.
3. Alternatively you can find out your psi by contacting your local water utility company.
4. If you have other appliances connected to the same water source, ensure they aren’t using water simultaneously, as this can reduce water pressure and result in the F20 error.
5. If you’ve recently installed a water softener or filtration system, ensure it’s functioning correctly, as these systems can sometimes reduce water pressure.

Blocked Water Inlet Filters

The water inlet filters (or screens) are found where the water inlet hoses connect to the back of the washer. They are designed to catch debris and contaminants to ensure that only clean water enters the washing machine. Over time they can become clogged, and restrict the flow of water into the machine, which can trigger the F20 error. You will need to clean these filters or replace them.

1. Using pliers, unscrew the water hoses from the back of the washing machine. Make sure you have a towel or bucket nearby as it is normal for some water to spill out at this point.
2. Once the hoses are removed, you should see the water inlet valve's small filters, situated right where the hoses connect.
3. Carefully remove the filters using a pair of needle-nose pliers. Be gentle to avoid damaging them.
4. Rinse the dirty filters under warm running water. You can use an old toothbrush to scrub away any debris or buildup gently. If the filters are worn down, it is best to discard them at this point and get a replacement water inlet filter.
5. Carefully place the filters back into their respective slots.
6. Reattach the hoses to the correct hot/cold mounts and ensure they're securely fitted but not overtightened, as this can damage the threads or the washer itself.
7. Slowly turn the water supply valves back on and check for any leaks around the hose connections.
8. Reconnect the washing machine to the power source.
9. Run a short wash cycle to ensure everything is functioning properly and that there are no leaks.

Kinked or Blocked Inlet Hoses

The water inlet hoses are responsible for delivering water to the washing machine from your home's water supply. If they are kinked or blocked by a foreign object, they can restrict or stop the flow of water, leading to insufficient water in the drum and triggering the F20 error.

1. Pull the washing machine from the wall to access the rear end.
2. Place a bucket or towel beneath the hoses to catch any water that might spill.
3. Unthread the hoses from the washing machine's back and from the wall, or laundry sink.
4. Visually examine the entire length of each hose for any visible damage, kinks, or bends.
5. Run high-pressure water through the hose to push out any obstructions.
6. Attach the hoses back to the washing machine and be careful to connect them to the correct hot and cold inlets.
7. Reconnect the other end of the hoses to your water supply. Turn the water supply valves on and check for any leaks.
8. Once everything is reassembled and there are no leaks, plug the washer back into the power source.
9. Run a Test Cycle to ensure that the F20 code is cleared, and the washer fills with water correctly.

Faulty Pressure Switch

The pressure switch (water level switch), which is typically found in the washer's control panel or the back of the washer, is responsible for detecting the water level in the drum. It ensures that the water is neither too low nor too high for the washer. If it's faulty, it may be unable to detect the water levels, even if they are sufficient, thus leading to the F20 error.

1. On some Whirlpool or Maytag models, the control panel is held in place by screws, and you will need to use a screwdriver to release it. On other models, it is secured by spring clips, and you will need to use a putty knife to push in and release these clips.
2. Once released, the control panel will either hinge backward or lift off.
3. Locate the Pressure Switch, which Is typically a round component with a rubber hose connected to it.
4. Inspect the switch for obvious damage or signs of wear. If any is present, the switch will need to be replaced. If none is present, you may need to test the switch for electrical failure using a multimeter.
5. To test the switch, first remove the hose from the switch.
6. Next, set your multimeter to the resistance (Ohms) setting, and place the probes on the switch's terminals.
7. Press down on the switch's actuator (it may be a small button or lever), and if the switch is functioning correctly, you should see a change in resistance when you press and release the actuator.
8. If there is no reading, you will need to replace the pressure switch as this is a signal that it has failed.

1. Gently pull the wiring connector(s) off the pressure switch.
2. Release the tab or remove the screw that holds the pressure switch in place.
3. Position the new pressure switch in place, secure it with the mounting tab or screw and reconnect the wiring harness.
4. Connect the hose to the new pressure switch. Make sure it's securely in place.
5. Place the control panel back in its original position and secure it with screws or ensure the spring clips are engaged.
the washer to power, and run a test cycle to ensure everything is functioning correctly.

Faulty Flow Meter

The flow meter or flow sensor is located near the water inlet valve and it measures the amount of water entering the washer. If it is faulty, it may be unable to accurately gauge the water level or may read the level as insufficient.

1. Remove the top panel or the back panel of the washer to access the interior.
2. Locate the flow meter near the water inlet valve. it will have wires and hoses connected to it.
3. Check the flow meter for any signs of damage, cracking, or wear. Ensure all connections (hoses and wires) are secure.
4. If there are no signs of damage, test the flow meter with a multimeter for an electrical fault.
5. Gently pull the wiring connectors off the flow meter. Connect the multimeter probes to the flow meter's terminals.
6. Blow air through the flow meter. You should see a change in the multimeter reading as the internal wheel moves. If there's no reading, you will likely need to find a replacement flow meter.

1. Carefully remove the hoses attached to the flow meter and use a towel or container to catch water that may spill out.
2. Remove the mounting hardware that secures the faulty flow meter.
3. Position your new flow meter in the same place, as the old one, secure it, then reconnect the hoses and wiring connectors.
4. Replace the top or back panel and secure it with screws.
5. After everything is reassembled, plug the washer back in and run a test cycle to ensure it's functioning correctly.

Understanding the F20 error in your Whirlpool or Maytag washer is essential for ensuring the longevity and efficient functioning of your machine. By following the troubleshooting steps detailed in this article, you can identify and resolve the source of the problem in your water intake system, potentially saving time and money on professional repairs. However, it is important to remember that if the problem persists or if you're unsure about any procedure, reaching out to a professional technician is always the safest course of action.