Dishwasher Not Running Hot Water

Quick answer

If your dishwasher isn’t running hot water, check the water supply temperature, heating element, and thermostat. Ensure the water heater is set to at least 120°F and test the heating element with a multimeter.

Confirm the symptom

• Dishes remain cold after a cycle
• No hot water entering the dishwasher
• Water drains cold even after a full cycle

Tools and prep

• Multimeter
• Screwdrivers (flathead and Phillips)
• Adjustable wrench
• Rubber gloves
• Safety goggles
• Towel or rag
• Turn off power at the circuit breaker
• Shut off the water supply to the dishwasher

Step-by-step troubleshooting

1. Check Water Supply Temperature
   Do: Test the temperature of the hot water at the kitchen sink using a thermometer.
   Observe: Water should be at least 120°F.
   Means: If below 120°F, adjust your water heater settings.
   Next: Adjust water heater if necessary
2. Inspect Dishwasher Heating Element
   Do: Unplug the dishwasher and remove the lower panel to access the heating element. Use a multimeter to test for continuity.
   Observe: No continuity indicates a faulty heating element.
   Means: Replace the heating element if it's defective.
   Next: Replace heating element
3. Test Thermostat
   Do: Locate the thermostat near the heating element and test it with a multimeter.
   Observe: No continuity suggests a faulty thermostat.
   Means: Replace the thermostat to restore heat.
   Next: Replace thermostat
4. Check High-Limit Thermostat
   Do: Test the high-limit thermostat for continuity using a multimeter.
   Observe: No continuity means it has tripped or failed.
   Means: Replace the high-limit thermostat.
   Next: Replace high-limit thermostat
5. Inspect Water Inlet Valve
   Do: Check the water inlet valve for blockages or damage. Clean or replace as needed.
   Observe: Clogged or damaged valve restricts hot water flow.
   Means: Clean or replace the water inlet valve.
   Next: Clean or replace water inlet valve
6. Verify Dishwasher Settings
   Do: Review the dishwasher’s control panel for any settings that might disable hot water use.
   Observe: Incorrect settings may prevent hot water activation.
   Means: Adjust settings to ensure hot water is enabled.
   Next: Adjust settings

Common causes

Parts matching

Common parts needed for a dishwasher not running hot water:

• Heating element
• Thermostat
• High-limit thermostat
• Water inlet valve
• Control board

Purchase parts compatible with your dishwasher model using the manufacturer’s part number.

When to call a professional

• You’re unsure about electrical testing or repairs.
• The problem persists after replacing all common parts.
• You notice water leaks or electrical shorts.
• The dishwasher is under warranty and you don’t want to void it.
• You lack the tools or confidence to complete repairs safely.

FAQ

Related guides

• dishwasher not heating water
• dishwasher not getting hot water
• dishwasher not cleaning properly

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