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Error code reference

Kenmore Dishwasher Error Code 6-3

Suds/air in pump

Kenmore codesKenmore dishwasher codes

Suds/air in pump — too many suds, bowls capturing wash water, water leaking, or diverter disk in sump is missing.

First step from the service manual

Allow unit to fill and wash for 1 minute. Open door and check for excessive sudsing. Confirm using proper dishwasher detergent. Check for excessive rinse aid leakage.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 6-3 means on a Kenmore dishwasher

Error code 6-3 on a Kenmore dishwasher signals that the control board has detected suds or air in the pump assembly. The board reads abnormal pressure or flow conditions during the wash cycle, indicating the circulation pump is not moving water correctly. The most common hardware-level cause is a missing or dislodged diverter disk in the sump, which disrupts water routing and allows air pockets to enter the pump. Water leaking into unintended areas can also introduce air into the pump circuit and trigger this fault.

For homeowners, this error usually means one of a few things is happening inside the dishwasher. The most frequent culprit is simply the wrong type of detergent - using hand dish soap or a non-dishwasher detergent creates excessive suds that overwhelm the pump. Bowls or containers loaded upside-down can trap water and cause wash arm pressure to drop. Rinse aid leaking from a cracked or overfilled dispenser also contributes to heavy sudsing. These are all conditions you can check yourself before calling for service. The diverter disk issue requires opening the sump area but is a relatively low-cost repair.

Source: manufacturer service documentation.

Common causes of 6-3

  1. 01

    Wrong or excessive detergent causing heavy sudsing

    Wiring / connection

    Using hand dish soap, laundry detergent, or too much dishwasher detergent generates foam that fills the pump with suds instead of water, causing the 6-3 fault. Switching to a proper automatic dishwasher detergent and using the correct amount resolves this without any parts.

  2. 02

    Rinse aid dispenser leaking excessively

    Part replacement

    A cracked rinse aid dispenser cap or an overfilled reservoir can leak rinse aid directly into the wash water, producing heavy sudsing that triggers the 6-3 code. Inspect the dispenser cap for cracks and wipe down the interior of the door to remove pooled rinse aid.

  3. 03

    Missing or dislodged diverter disk in the sump

    Part replacement

    The diverter disk in the sump controls water flow between the upper and lower spray arms. If this disk is missing, broken, or seated incorrectly, air enters the pump and the control board registers it as a 6-3 fault. The disk must be inspected and replaced if damaged.

  4. 04

    Bowls or containers trapping wash water

    Wiring / connection

    Items loaded facing upward or at the wrong angle collect water during the wash cycle, reducing circulation pressure and causing the pump to pull air. Rearranging the load so all concave items face downward at an angle eliminates this condition without any repair.

See the test procedure for each cause

Frequently asked questions about 6-3

What does error code 6-3 mean on a Kenmore dishwasher?
Code 6-3 means the control board detected suds or air in the pump during the wash cycle. This can be caused by excessive sudsing from the wrong detergent, rinse aid leaking into the tub, bowls trapping water and starving the pump, or a missing diverter disk in the sump assembly. The dishwasher stops normal operation to protect the pump from running dry or under abnormal load.
How do I fix error code 6-3 on my Kenmore dishwasher?
Start by letting the unit fill and run for about one minute, then open the door and look for heavy foam inside the tub. If suds are present, check that you are using automatic dishwasher detergent only and using the recommended amount. Also inspect the rinse aid dispenser cap for cracks or overflow. If sudsing is not the issue, remove the lower rack and spray arm and inspect the diverter disk in the sump - if it is missing or broken, replace it to clear the fault.
Is it safe to keep using my Kenmore dishwasher with a 6-3 error active?
Running the dishwasher while a 6-3 code is active is not recommended. Air or suds in the pump can cause the circulation pump motor to run without adequate water, which generates heat and accelerates wear. The machine will also not clean dishes effectively in this state. Resolve the cause before running a full cycle.
Can a missing diverter disk really cause the 6-3 code on a Kenmore dishwasher?
Yes, the diverter disk sits in the sump and routes water to the spray arms in the correct sequence. Without it, water flow is uncontrolled, air enters the pump, and the control board flags the abnormal pump condition as 6-3. The diverter disk is a low-cost part, typically under $20, and can be replaced by removing the lower spray arm and filter assembly to access the sump.
How much does it cost to repair a Kenmore dishwasher showing code 6-3?
If the cause is wrong detergent or a loading issue, there is no cost. A replacement rinse aid dispenser cap runs roughly $10 to $25 and is a DIY-friendly swap. A new diverter disk is typically under $20 and requires no special tools to install. If the pump itself has been damaged from running with air or suds over time, pump replacement ranges from $80 to $150 for parts, plus labor if you use a technician.

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