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

Technical Background:

The F8 E1 error code on a Whirlpool dishwasher indicates an overflow or flood condition. The MCU (Main Control Unit) monitors the float switch, which is designed to detect excessive water levels. When the water level rises too high, the float activates the switch, sending a signal to the MCU to shut off the water inlet valve and activate the drain pump. The MCU generates the F8 E1 error when it receives an unexpected signal from the float switch (either constantly open or closed), or when it anticipates a signal change and it doesn't occur. The MCU expects specific voltage levels on certain pins during normal operation, and any deviation will trigger an error. The voltage path includes the float switch, wiring harness, and the MCU input. If there's a break in the path or an unexpected voltage, the F8 E1 error will display.

Symptoms:

The homeowner observes the dishwasher displaying an F8 E1 error code on the control panel. The dishwasher may or may not be filling with water, and it might not start a wash cycle. They may notice standing water in the bottom of the dishwasher tub even after a cycle is complete, or the dishwasher may be beeping continuously.

Possible Causes:

Clogged drain causing standing water in the tub
Faulty float switch
Stuck or misaligned float
Wiring harness issue to the float switch
Defective dishwasher control board (MCU)

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Inspect the dishwasher tub for standing water. If present, manually bail it out.
3

Locate the float switch assembly, typically at the bottom of the dishwasher. It may require removing the lower spray arm and filter to access it. Check for any obstructions.
4

Check the float for free movement. Ensure it's not obstructed by debris. Clean the area around the float.
5

Use a multimeter to test the continuity of the float switch in both the up and down positions. It should be closed (continuity) when the float is raised and open (no continuity) when the float is lowered. Replace if faulty.
6

Inspect the wiring harness connected to the float switch for any damage or loose connections. Use a 1/4-inch nut driver to access the control panel and inspect the wiring connections to the MCU. Repair or replace as needed.
7

If the float switch and wiring are good, consider replacing the dishwasher control board (MCU) as a last resort. This requires carefully disconnecting and reconnecting several wires, so take photos for reference.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed to prevent accidental energization. Dishwashers operate on 120V AC, which can cause serious injury or death. If you are not comfortable working with electricity, consult a qualified appliance repair technician.

Prevention:

Run the dishwasher regularly with a dishwasher cleaner to prevent buildup and clogs. Periodically inspect and clean the filter at the bottom of the dishwasher tub. Avoid overloading the dishwasher to prevent food particles from blocking the drain. Ensure proper leveling of the dishwasher to ensure proper drainage.

Expert Tip:

Try initiating a diagnostic cycle on the dishwasher. This can help pinpoint the exact issue. Refer to the service manual for the specific button sequence to enter diagnostic mode for your Whirlpool model. The diagnostic cycle can sometimes clear minor faults and reset the system.

Frequently Asked Questions

•How do I access the float switch assembly on my Whirlpool dishwasher?

Typically, you'll need to remove the lower spray arm and the filter assembly at the bottom of the dishwasher tub. The float switch is usually located underneath the filter housing. Some models may require removing a lower access panel.

•What is the correct resistance reading for a functioning float switch?

A functioning float switch should have continuity (close to 0 ohms) when the float is in the raised position (indicating a high water level) and no continuity (infinite resistance or OL on the multimeter) when the float is in the lowered position.

•Where can I find a replacement float switch for my Whirlpool dishwasher model?

You can purchase replacement float switches from appliance parts retailers, online retailers like Amazon or RepairClinic, or directly from Whirlpool's parts website. Be sure to have your dishwasher model number handy to ensure you order the correct part.

Whirlpool Dishwasher F8 E1 Error Code: Float Magnet Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the float switch assembly on my Whirlpool dishwasher?

•What is the correct resistance reading for a functioning float switch?

•Where can I find a replacement float switch for my Whirlpool dishwasher model?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: