Whirlpool Dishwasher F8 E1 Error Code: Float Magnet... | appliancefaults.com

Technical Background:

The F8 E1 error code indicates a problem with the water level or overfill protection system. The main control unit (MCU) monitors the float switch. When the water level rises too high, the float rises, activating the float switch. The MCU then triggers the drain pump to prevent overfilling. The MCU expects a specific voltage signal from the float switch depending on its state (open or closed). An unexpected or missing signal triggers the F8 E1 error.

Symptoms:

The dishwasher displays an F8 E1 error code on the control panel. The dishwasher may overfill, or not drain properly. The cycle may be interrupted mid-wash.

Possible Causes:

Float switch malfunction
Stuck or misaligned float
Wiring harness issue to the float switch
Debris obstructing float movement
Control board failure
Excessive suds or overfilling

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Locate the float switch, typically at the bottom of the dishwasher tub. Access may require removing the lower spray arm and filter assembly.
3

Inspect the float for free movement. Remove any debris or obstructions. Clean the area thoroughly.
4

Use a multimeter to test the float switch for continuity in both the up and down positions. It should show continuity when the float is raised and no continuity when lowered. A reading of OL (open loop) in either position indicates a faulty switch.
5

Check the wiring harness and connections to the float switch and control board for damage or loose connections. Use a 1/4-inch nut driver to tighten connections at the control board. Ensure you have approximately 120V AC at the control board input.
6

If the float switch is defective, replace it with a new one. Verify the replacement switch matches the original specifications.
7

Restore power and run a diagnostic cycle to verify the repair. Consult the service manual for the specific diagnostic cycle procedure.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before performing any repairs. This is a Lock-Out Tag-Out (LOTO) procedure. Dishwashers operate on 120V AC, which can cause serious injury or death. Always verify the power is off with a multimeter before touching any internal components.

Prevention:

Regularly clean the dishwasher filter and spray arms to prevent debris buildup. Avoid using excessive amounts of dish soap, as this can lead to excessive suds and potential overfilling. Inspect the float area during routine maintenance.

Expert Tip:

After replacing the float switch, enter the dishwasher's service mode to calibrate the water level sensor. Press and hold the Start/Resume button for 5 seconds, then press the Heated Dry button followed by the Normal Wash button within 5 seconds. This will initiate the calibration sequence.

Follow-up Questions:

Frequently Asked Questions

•How do I access the diagnostic cycle on my Whirlpool dishwasher?

The diagnostic cycle varies depending on the model. Consult your dishwasher's service manual or search online using your specific model number to find the correct sequence of button presses to initiate the diagnostic cycle.

•What is the proper resistance reading I should expect from the float switch when it's activated?

A functioning float switch should exhibit near zero ohms (a closed circuit) when the float is raised, indicating that the switch is activated. When the float is lowered, it should read infinite resistance (an open circuit).

•Where is the control board located in my Whirlpool dishwasher, and how do I access it?

The control board is typically located behind the access panel at the bottom front of the dishwasher or behind the control panel at the top. You will likely need to use a Phillips head screwdriver and/or a 1/4-inch nut driver to remove screws and access the control board.

Whirlpool Dishwasher F8 E1 Error Code: Float Magnet Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the diagnostic cycle on my Whirlpool dishwasher?

•What is the proper resistance reading I should expect from the float switch when it's activated?

•Where is the control board located in my Whirlpool dishwasher, and how do I access it?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: