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HomeRepair HelpLG Dishwasher RepairLG Dishwasher overheating Repair
LG Dishwasher overheating
If your LG dishwasher is overheating, the most common cause is a shorted heating element or heating element assembly that keeps raising the water temperature past normal operating range. After that, check the high-limit thermostat, make sure the thermostat is firmly positioned against the tub in its support bracket, and then test the thermostat itself if needed. Another possible cause is water entering the dishwasher too hot, since incoming water above about 120°F can make an LG dishwasher get too hot and affect normal operation. For a dishwasher overheating problem, a multimeter is the right tool for checking the heating element, heating element assembly, high-limit thermostat, and thermostat for shorts or continuity issues before replacing parts. If your dishwasher gets too hot during the cycle, start with the parts most likely to fail first instead of jumping straight to the less common causes. To find the exact LG heating element, high-limit thermostat, thermostat, or other replacement part for your machine, enter your model number on RepairClinic.com and match the part to your specific dishwasher.
01 - LG Dishwasher Heating Element
A shorted heating element may be raising the temperature of the water beyond what is normal for proper operation and causing the dishwasher to overheat. You can use a multimeter to test the heating element for a short to help determine if the component should be replaced.
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02 - LG Dishwasher Heating Element Assembly
A shorted heating element assembly may be raising the temperature of the water beyond what is normal for proper operation and causing the dishwasher to overheat. You can use a multimeter to test the assembly for a short to help determine if the component should be replaced.
Top Solution
03 - LG Dishwasher High Limit Thermostat
The high-limit thermostat monitors the dishwasher internal temperature and shuts off the heating element if the dishwasher overheats. If the high-limit thermostat is malfunctioning, it may shut off the voltage to the heating element circuit. However, this is rarely the case. Before replacing the high limit thermostat check all the more commonly defective parts. If you have determined that all of the other components are working properly, test the thermostat by using a multimeter to test it for continuity.
Highly Likely
04 - Thermostat out of position
The thermostat should be firmly pressed against the tub. If the thermostat is loose or is not in the support bracket correctly, it will not sense the water and air temperature properly, and can cause the dishwasher to overheat.
Highly Likely
05 - LG Dishwasher Thermostat
The thermostat monitors the dishwasher internal temperature and shuts off the heating element if the dishwasher overheats. If the thermostat is malfunctioning, it may shut off the voltage to the heating element circuit. However, this is rarely the case. Before replacing the thermostat check all the more commonly defective parts. If you have determined that all of the other components are working properly, test the thermostat by using a multimeter to check it for continuity.
Highly Likely
06 - Water supply temperature too hot
The water supply temperature may be too hot. The recommended water supply temperature for a dishwasher to clean properly is 120 degrees Fahrenheit (49 degrees Celsius). If your hot water temperature is higher, it should be turned lower for safety reasons.
Highly Likely
Frequently Asked Questions
Why is my LG dishwasher overheating?
How do I test an LG dishwasher heating element for an overheating problem?
Can a bad thermostat cause an LG dishwasher to overheat?
What water temperature is too hot for an LG dishwasher?
How do I find the right LG dishwasher heating element or thermostat part?
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