I’ve been struggling with my KitchenAid dishwasher not heating water or drying dishes properly, even after replacing parts like the heating element and thermostat. If you’re facing the same issue, you’re not alone. This problem is actually more common than most people think.
After digging through fixes and real repair cases, I found several practical solutions that actually work.
Quick Answer
If your KitchenAid dishwasher is not heating water or drying, the issue is usually caused by a sensor fault, control board reset issue, or wiring problem, not just the heating element.
In many cases, simply running a diagnostic/reset cycle fixes it.
Step-by-Step Solution
1. Run a full diagnostic/reset cycle (Most important fix)
Many users skip this, but it’s critical.
Steps:
- Turn off power at the breaker for 5 minutes
- Turn power back on
- Press any 3 buttons in sequence 3 times
- Close the door and let the full diagnostic cycle complete (do NOT interrupt)
This resets:
- Heating system
- Control board logic
- Sensors
👉 This alone has fixed the issue for many users
2. Check if the heating element actually works
Even if replaced, confirm it works:
- During dry cycle, open door carefully
- Feel for heat or steam
If it heats during drying but not washing:
➡️ The issue is likely sensor or control-related, not the element
3. Inspect the thermistor / OWI sensor
If your dishwasher:
- Doesn’t heat during wash
- But heating element is fine
Then the thermistor (temperature sensor) may be faulty.
Why this matters:
- If it can’t detect temperature, the system disables heating completely
4. Check wiring continuity
Disconnect power first.
Then:
- Test wires from control board → heating element
- Look for loose or damaged connections
Even a small break stops heating.
5. Inspect or replace the diverter motor
Some users solved it by replacing the diverter motor.
Symptoms:
- Water not reaching proper temperature
- Poor cleaning + no drying
The diverter controls water flow.
If faulty, heating becomes ineffective.
6. Check circulation pump performance
If water isn’t circulating:
- Heat won’t distribute
- Dishwasher assumes heater failure
Signs:
- Weak spray
- Dishes not cleaning
Fix:
- Repair or replace the circulation pump
Extra Tips and Best Practices
- Always run a diagnostic cycle after replacing any part
- Use hot water supply (45–60°C) for better performance
- Clean filters regularly to avoid sensor issues
- Use dishwasher cleaner occasionally (helps turbidity sensor)
Common Mistakes to Avoid
❌ Replacing parts without resetting the system
❌ Interrupting the diagnostic cycle midway
❌ Assuming heating element is always the problem
❌ Ignoring sensors (thermistor/OWI)
❌ Not checking wiring continuity
FAQ Section
Why does my dishwasher heat only during drying but not washing?
This usually means the sensor or control board isn’t triggering heating during wash cycles, even though the element works.
Do I need to replace the control board?
Not always.
Try a full diagnostic reset first. Many cases are fixed without replacing the board.
How do I know if the thermistor is bad?
If:
- Water stays cold
- Heating element works in dry mode
➡️ The thermistor is likely faulty or not reading correctly.
Conclusion
If your KitchenAid dishwasher is not heating water or drying dishes, don’t rush to replace expensive parts. Start with a diagnostic reset, then check sensors, wiring, and circulation.
In many cases, the fix is simple and costs nothing.
Reference Links
https://www.partselect.com/Dishwasher+not-drying+repair.htm
https://www.searspartsdirect.com/diy/repair-guide/how-to-fix-a-dishwasher-that-wont-heat
https://www.ifixit.com/Answers/View/354777/Dishwasher+does+not+heat+the+water+or+dry+the+dishes
