Kitchenaid Dishwasher: overheating

Professional Repair Guide

What is this symptom?

Experiencing overheating issues with your KitchenAid dishwasher? If the interior or exterior feels excessively hot, causing scorching dishes or dangerously hot air, it could be due to a defective temperature sensor, incorrect water temperature, or control board malfunction. Address this issue promptly to avoid potential damage or safety hazards.

Urgency: High

Important Tips for Kitchenaid Models

KitchenAid parts catalogs and repair sites specifically list temperature sensor parts for overheating issues, though official KitchenAid troubleshooting documentation on overheating is limited.

Possible Causes

Defective or failed temperature sensor

How to Identify: Dishwasher overheats consistently; sensor resistance test with multimeter shows outâ€‘ofâ€‘range values; error codes on some models.

Part: Temperature sensor (NTC thermistor)

Incorrect incoming water temperature too high

How to Identify: Measured hot water supply > 120Â°F at dishwasher inlet; no component faults but interior feels excessively hot early in cycle.

Part: Household hot water supply

Control board malfunction

How to Identify: Intermittent or no temperature regulation; replacing sensor doesnâ€™t fix issue; other control errors present.

Part: Main control board/electronics

DIY Solutions

Check and adjust hot water supply temperature

Easy 10-30 minutes

Tools Needed: kitchen thermometer

Run hot water at the sink nearest the dishwasher until hot.
Use a kitchen thermometer to measure water temperature at the tap.
If greater than 120Â°F, lower water heater setting and re-test dishwasher cycle.

⚠️ Safety First: Avoid burns when measuring hot water.

Test temperature sensor with multimeter

Moderate 30-60 minutes

Tools Needed: multimeter, screwdriver set

Turn off power and water to dishwasher.
Remove access panel to locate the temperature sensor near the sump/heating area.
Disconnect sensor and measure resistance at room temp; check against spec in service manual.
Replace sensor if out of spec.

⚠️ Safety First: Ensure power is disconnected before working inside the unit.

Professional Repairs

Replace temperature sensor or control board

Estimated Cost: $80 - $300

When to Call a Professional

Dishwasher continues overheating after sensor test/replacement

Control board indices faults or multiple error codes present

Unusual smells (burning) or signs of component damage

Preventive Maintenance

Verify household hot water temperature: Excessively hot water supply that can contribute to dishwasher overheating
Frequency: annual

Frequently Asked Questions

Why is my KitchenAid Dishwasher overheating?

Common causes include a defective temperature sensor, incorrect incoming water temperature, or a malfunctioning control board.

How do I fix KitchenAid Dishwasher overheating myself?

Check the hot water supply temperature and test the temperature sensor with a multimeter for potential issues.

How much does it cost to fix overheating?

Professional repair costs for replacing the temperature sensor or control board typically range from $80 to $300.

When should I call a technician for overheating?

If DIY solutions don't resolve the issue or if you're unsure about the repairs, it's best to contact a technician due to the urgency and complexity.

References & Sources

How To Fix Dishwasher Getting Too Hot (DIY guide) Community

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

65%

DIY Success Rate Difficulty: Either

Common Issues Reported by Users

Faulty recirculation pump motor drawing excessive power
Clogged filter or spray arms restricting water flow
Defective thermostat causing incorrect temperature readings

User Suggested Solutions

Inspect and replace the recirculation pump motor if it is faulty. Disconnect power, remove the dishwasher from the cabinet, take off the lower spray arm and filter, and access the pump. Test the motor with a multimeter and replace if necessary.
Clean the filter and spray arms to remove clogs. Remove the lower spray arm and filter, rinse under warm water, and ensure all holes are clear. Reassemble and test the dishwasher.
Check and replace the thermostat if it is defective. Access the thermostat located near the heating element, test it for continuity, and replace if it fails the test.