LG Smart Dishwasher bE Error: Suds or Bubble Issue -... | digitalhomefaults.org

Technical Background:

The LG Smart Dishwasher uses a turbidity sensor to detect soil levels and adjust the wash cycle accordingly. The 'bE' error typically indicates an issue with the foam or suds level interfering with the sensor's readings. The dishwasher's control board monitors signals from the turbidity sensor (analog voltage, typically 0-5V DC) and pressure sensors to determine water fill and drainage. Communication between the control board and the motor control inverter occurs via serial communication. OTA firmware updates are delivered over Wi-Fi (2.4 GHz band preferred).

Symptoms:

The LG Smart Dishwasher displays the 'bE' error code on the control panel. This may be accompanied by excessive suds visible inside the dishwasher cavity, incomplete wash cycles, or water leakage. App-side error logs will mirror the 'bE' code. Visible residue may be present on dishes post-cycle.

Possible Causes:

Excessive detergent usage or incorrect detergent type (non-dishwasher safe).
Use of rinse aid with high surfactant concentration.
Malfunctioning turbidity sensor providing inaccurate readings.
Partially blocked drain hose or air gap, causing slow drainage and suds accumulation.
Software glitch or firmware corruption affecting sensor interpretation.
Water hardness exceeding recommended levels for detergent effectiveness (common in certain Canadian regions).

Solution:

1

Disconnect power to the dishwasher at the breaker (breaker lockout procedure). Verify power is off with a multimeter.
2

Manually remove excess suds from the dishwasher cavity with a wet/dry vacuum.
3

Inspect the drain hose for kinks or blockages. Clean or replace as needed.
4

Check the air gap (if present) for clogs. Clean the air gap thoroughly.
5

Run a calibration cycle on the turbidity sensor if the dishwasher model supports it (refer to the service manual).
6

If issue persists, replace the turbidity sensor. Ensure correct part number compatibility.
7

Reconnect power and run a test cycle with a minimal amount of dishwasher-safe detergent. Monitor for recurrence of the 'bE' error.

Safety Warning:

Always disconnect power to the dishwasher before performing any maintenance or repairs. High voltage components are present. Do not attempt to repair the control board or motor control inverter without proper training and safety equipment. Ensure proper grounding of the appliance to prevent electrical shock. Verify Canadian Electrical Code compliance.

Prevention:

- Use only dishwasher-safe detergent and follow the manufacturer's recommended dosage. - Reduce the amount of rinse aid used or switch to a low-surfactant formula. - Regularly clean the dishwasher filter to prevent food particles from contributing to suds formation. - Check and maintain the air gap (if installed) to ensure proper drainage. - Periodically update the dishwasher's firmware via the LG ThinQ app to address potential software glitches.

Expert Tip:

A temporary bypass of the turbidity sensor can sometimes be achieved through the service menu (consult the service manual for entry sequence, varies by LG model) to allow the dishwasher to complete a cycle. This is a diagnostic measure only and should not be a permanent solution.

Frequently Asked Questions

•What type of detergent is recommended for LG Smart Dishwashers?

Use only detergents specifically formulated for automatic dishwashers. Avoid hand soap or dish soap, as these create excessive suds.

•How do I access the service menu on my LG Smart Dishwasher?

The service menu access sequence varies by model. Consult the service manual or search online forums for the specific key combination for your dishwasher model. Exercise caution, as incorrect settings can damage the appliance.

•Where can I find the service manual for my LG Smart Dishwasher?

You can often find service manuals online through LG's website or third-party appliance repair resources. Search by your dishwasher's model number.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

Frequently Asked Questions

•What type of detergent is recommended for LG Smart Dishwashers?

•How do I access the service menu on my LG Smart Dishwasher?

•Where can I find the service manual for my LG Smart Dishwasher?

Related Questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: