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Error code reference

Kenmore Dishwasher Error Code 8-3

Cold water; incoming water under 18°C (65°F).

Kenmore codesKenmore dishwasher codes

Cold water; incoming water under 18°C (65°F).

First step from the service manual

1. Be sure dishwasher is connected to the hot water supply. 2. Unplug dishwasher or disconnect power. 3. Check all connections and measure resistance in Temperature Sensing Circuit. Replace OWI if needed. 4. Confirm temperature at sink (recommend 49°C/120°F).

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

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What 8-3 means on a Kenmore dishwasher

The Kenmore dishwasher error code 8-3 indicates that the control has detected incoming water temperature below 18°C (65°F). The dishwasher monitors incoming water temperature through an Optical Water Indicator (OWI) sensor, which is part of the Temperature Sensing Circuit. When this circuit registers water that is too cold at the start of a cycle, the control board logs the 8-3 fault to alert the user that wash performance may be compromised and that the unit is not receiving adequately heated water.

The most common root cause is a simple installation issue: the dishwasher being connected to a cold water supply line rather than the hot water supply. Beyond that, the Temperature Sensing Circuit itself can be at fault if wiring connections are loose, corroded, or broken, or if the OWI sensor has failed and is reporting inaccurate readings. Resistance measurement across the Temperature Sensing Circuit connections is the key electrical test to determine whether the sensor and wiring are within specification.

Water temperature at the source also plays a role. Even when connected to the hot water supply, a water heater set too low or a long run of pipe that has not been flushed before starting the cycle can deliver water well below the recommended 49°C (120°F). Running the hot water at the nearest sink until it reaches full temperature before starting the dishwasher is a simple field test that can quickly rule out supply temperature as the cause.

Source: manufacturer service documentation.

Common causes of 8-3

  1. 01

    Connected to cold water supply

    Wiring / connection

    The dishwasher supply line may be connected to the cold water shutoff under the sink instead of the hot water line. Verify which line the dishwasher inlet hose is attached to before any other diagnostics.

  2. 02

    Water heater set too low or supply not flushed

    Wiring / connection

    If the water heater is set below 49°C (120°F), or if cold water sitting in the pipes has not been cleared before starting the cycle, the incoming water can easily read below 18°C. Run the hot water at the kitchen sink until it is hot before starting the dishwasher to test this.

  3. 03

    Loose or corroded Temperature Sensing Circuit connections

    Wiring / connection

    Wiring connections in the Temperature Sensing Circuit can loosen or corrode over time, causing the control to read falsely low temperatures. Unplug the dishwasher and inspect all connectors in the circuit, reseating or cleaning any that appear compromised.

  4. 04

    Failed OWI sensor

    Part replacement

    If the Optical Water Indicator sensor has failed, it may report incorrect temperature data to the control board even when water temperature is adequate. Measuring resistance across the Temperature Sensing Circuit will help confirm whether the OWI is out of specification and needs replacement.

See the test procedure for each cause

Frequently asked questions about 8-3

What does 8-3 mean on a Kenmore dishwasher?
Error code 8-3 on a Kenmore dishwasher means the control has detected incoming water temperature below 18°C (65°F). The dishwasher requires hot water to operate correctly, and this code alerts you that the water entering the unit is too cold. The fault is detected through the Temperature Sensing Circuit, which includes the OWI sensor. The recommended incoming water temperature is 49°C (120°F).
How do I fix error code 8-3 on my Kenmore dishwasher?
Start by confirming the dishwasher is connected to the hot water supply line under the sink. Next, run the hot water at your kitchen sink until it reaches full temperature, then start the dishwasher cycle. If the error persists, unplug the dishwasher, inspect and reseat all wiring connections in the Temperature Sensing Circuit, and measure the circuit resistance. If the OWI sensor tests out of specification, it will need to be replaced.
Will resetting my Kenmore dishwasher clear the 8-3 error code?
Resetting the dishwasher by disconnecting power may temporarily clear the code, but it will return if the underlying cause is not corrected. If the incoming water temperature is still below 18°C when the next cycle begins, the control will detect the fault again and redisplay 8-3. Address the water supply temperature or sensor issue first for a lasting fix.
Is it safe to run my Kenmore dishwasher when error code 8-3 is showing?
Running the dishwasher with code 8-3 active is not dangerous in terms of physical safety, but wash performance will be significantly reduced because cold water does not dissolve detergent or sanitize dishes effectively. It is best to resolve the water temperature issue before continuing to use the appliance to ensure proper cleaning results.
How much does it cost to repair a Kenmore dishwasher showing error code 8-3?
If the fix is simply reconnecting to the hot water supply or adjusting the water heater setting, there is no parts cost involved. If the OWI sensor needs to be replaced, parts and labor costs typically range from around $75 to $200 depending on parts availability and local service rates. Having a technician diagnose and measure resistance in the Temperature Sensing Circuit before ordering parts can help avoid unnecessary expenses.

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