Dishwasher Temp Log: How to Check and Troubleshoot

Quick answer

Use your dishwasher's temperature log to identify heating problems. Check the log for consistently low temperatures, then test the heating element and thermostat. Replace faulty parts if needed.

Confirm the symptom

• Dishes not drying properly
• Water feels cold during cycle
• Error codes related to temperature
• Dishes still dirty after cycle completes
• Longer than normal wash cycles

Tools and prep

• Screwdriver set
• Multimeter
• Owner's manual
• Flashlight
• Rubber gloves
• Paper and pen for recording temps
• Turn off power at circuit breaker
• Ensure dishwasher is empty

Step-by-step troubleshooting

1. Access the Temperature Log
   Do: Consult your owner's manual to locate the temperature log display or menu option.
   Observe: Log shows temperature data from recent cycles
   Means: Your dishwasher has a built-in diagnostic feature
   Next: Check temperatures against manufacturer specs
2. Check Temperature Readings
   Do: Compare recorded temperatures to the manufacturer's recommended range (usually 120–160°F during wash, 140–180°F during rinse).
   Observe: Temperatures consistently below recommended range
   Means: Possible heating element or thermostat issue
   Next: Test heating element with multimeter
3. Test Heating Element
   Do: Set multimeter to ohms and test continuity across heating element terminals.
   Observe: No continuity or resistance outside spec range
   Means: Faulty heating element
   Next: Replace heating element
4. Test Thermostat
   Do: Test thermostat continuity with multimeter while heating up the dishwasher (use oven mitts for safety).
   Observe: Thermostat fails to open/close properly
   Means: Faulty thermostat
   Next: Replace thermostat
5. Inspect Heating Element for Damage
   Do: Visually check heating element for cracks, corrosion, or burning.
   Observe: Visible damage to element
   Means: Physical damage preventing proper heating
   Next: Replace heating element
6. Check Water Inlet Valve
   Do: Ensure cold water isn't overwhelming the heating system by checking inlet valve operation.
   Observe: Water temperature at inlet is too cold
   Means: Incoming water temperature issue
   Next: Adjust water heater temperature
7. Verify Drain System
   Do: Check for clogged drain pump or filter that might be causing recirculation of cold water.
   Observe: Debris in drain system or poor drainage
   Means: Cold water recirculation issue
   Next: Clean drain system components
8. Reset Dishwasher
   Do: Perform a power reset by turning off power at circuit breaker for 1 minute.
   Observe: System resets and logs clear
   Means: Possible temporary glitch
   Next: Run test cycle and check temperature log

Common causes

Parts matching

If you need to replace parts based on your diagnosis, here's what to look for:

• Heating element: Match voltage, wattage, and mounting style to your model
• Thermostat: Verify temperature range and terminal configuration
• Thermostat: Verify temperature range and terminal configuration
• Water inlet valve: Ensure it matches your model's inlet size and type
• Temperature sensor: Must match resistance specs in your manual
• Control board: Must be exact model match for compatibility

Use your full dishwasher model number when ordering replacement parts for accuracy.

When to call a professional

• You're uncomfortable working with electrical components
• You don't have access to a multimeter or owner's manual
• Test results are inconclusive after following all steps
• Dishwasher is under warranty and you don't want to risk voiding it
• You notice burning smells or visible electrical damage

FAQ

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