Hotpoint Washer Error Code E4: Overflow Protection... | appliancefaults.com

Technical Background:

The E4 error code indicates that the washer's main control unit (MCU) has detected an overflow condition. This is typically determined by the pressure switch, which monitors the water level inside the tub. The MCU monitors the voltage signal from the pressure switch. If the voltage remains high for an extended period, it assumes an overflow and triggers the E4 error. The MCU then activates the drain pump.

Symptoms:

The washer displays error code E4, and the tub may be overfilled with water, or the washer may fail to drain completely. You might also notice water leaking from the washer.

Possible Causes:

Faulty water inlet valve allowing continuous fill.
Defective pressure switch unable to signal correct water level.
Clogged drain pump or drain line preventing proper drainage.
Failed main control board (MCU) sending erroneous signals.
Kinked or blocked drain hose.
Over sudsing causing false water level readings.

Solution:

1

Unplug the washer from the 120V AC outlet.
2

Inspect the drain hose for kinks or blockages. Ensure it's properly connected to the drain standpipe.
3

Check the water inlet valve screens for debris. Clean if necessary.
4

Disconnect the pressure switch hose from the tub and blow into it. Listen for a click. If no click, replace the pressure switch.
5

Access the drain pump (usually at the bottom front or rear of the washer). Check for obstructions. Use a multimeter to test the drain pump for continuity (should read between 10-20 ohms).
6

Inspect the wiring harness and connectors to the pressure switch, water inlet valve, and drain pump for damage.
7

If all components check out, the main control board (MCU) may be faulty. Replacement is typically required.

Safety Warning:

Disconnect power to the appliance before performing any repairs. Lock-out/Tag-out procedures should be followed by certified technicians. Some components operate on 120V AC; exercise caution to avoid electrical shock.

Prevention:

Use the correct amount of HE (High Efficiency) detergent. Periodically check the drain hose for kinks. Clean the water inlet valve screens annually.

Expert Tip:

Some Hotpoint washers have a diagnostic mode. To enter, press and hold the Start/Pause button while simultaneously pressing the Water Level and Water Temp buttons for 3 seconds. This will allow you to read stored error codes and run diagnostic tests on individual components.

Frequently Asked Questions

•How do I access the drain pump on my Hotpoint washer?

Typically, the drain pump is located at the bottom front or rear of the washer. You may need to remove an access panel to reach it. Consult your washer's service manual for specific instructions.

•What is the correct type of detergent to use in my Hotpoint HE washer?

You should only use HE (High Efficiency) detergent in your Hotpoint HE washer. This type of detergent produces fewer suds, preventing over-sudsing and potential problems with the pressure switch.

•How do I test the pressure switch with a multimeter?

Unplug the washer. Disconnect the pressure switch. Set your multimeter to the ohms setting. Connect the multimeter probes to the pressure switch terminals. Blow into the pressure switch hose and observe the multimeter reading. The resistance should change when you blow into the hose, indicating the switch is functioning. Refer to the service manual for specific resistance values.

Hotpoint Washer Error Code E4: Overflow Protection Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the drain pump on my Hotpoint washer?

•What is the correct type of detergent to use in my Hotpoint HE washer?

•How do I test the pressure switch with a multimeter?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: