Kenmore Dishwasher Error Code i40: Meaning and Fix
Also shown as: I40
Reading the dishwasher display
A dishwasher reports its fault in the display window, or by blinking a cycle light a set number of times with a pause between groups. Count the blinks and pauses before opening the door. Check the model-number prefix first: the same Kenmore code can mean different things depending on the manufacturer.
Kenmore is a private label, and the factory that built your unit decides which fault codes it shows. The first digits of a Kenmore model number (110, 417, 665, 795, 796 and so on) tell you whether Whirlpool, LG, Electrolux or Frigidaire made it. Check the model label on your unit before using any chart.
What causes i40
- A burned-out heating element or open thermal fuse
- A damaged wire, connector or relay on the control board feeding the heater
- A faulty temperature sensor (NTC) reporting the wrong reading to the control
- Thermal fuse tripped
How to fix it
- Switch the appliance off at the breaker and let it cool completely before working on it.
- Inspect the heater wiring and connectors for scorching, looseness or corrosion and reseat them.
- Check the thermal fuse and replace if open.
- Test the heating element and the temperature sensor for continuity/resistance with a multimeter against the values in your service sheet.
- Replace whichever component fails the test; never bypass a thermal fuse.
- Reassemble, restore power and run a hot cycle, checking that the water or air reaches temperature in a normal time.
Parts you may need
| Part | Part no. | Buy |
|---|---|---|
| Dishwasher Heating Element | W10518394 | Find part |
Part numbers are OEM references; confirm fit by your model number before ordering. Some links are affiliate links; we may earn a commission at no extra cost to you.
Questions
What does error i40 mean on a Kenmore dishwasher?
The machine could not heat water to temperature. Kenmore sells units built by several manufacturers, so the code table that applies depends on who made your model; use the model number to confirm.
Can I keep using my dishwasher while i40 is showing?
You can run cold or short cycles in a pinch, but results will be poor, and a heater that stays on is a safety concern, so repair it soon.
How do I clear i40, and can I fix it myself?
Cancel the program, switch the appliance off and leave it unplugged (or the breaker off) for about five minutes, then restart. The code only stays cleared if the underlying problem is fixed, so work through the steps above. Parts here involve electronics, heating or sealed components, so consider a qualified technician if the basic checks do not clear it.
Other Kenmore dishwasher codes
Sources
Part numbers are OEM references; confirm fit by your model number before ordering. Meanings compiled from manufacturer and parts-retailer documentation; see sources below. Unplug the appliance before opening it.
Applies to models including Kenmore Elite 665 series (Bosch/Whirlpool/Electrolux-built), Kenmore 665.1 series (Whirlpool-built), Kenmore 630 / 665.13 series (Electrolux-built).