Heater Element and Thermostat Check
Purpose
The heater element and thermostat are responsible for heating the water in the washing machine to the desired temperature for each cycle. Issues with these components can lead to cold washes, longer cycle times, or the machine failing to heat the water at all. Diagnosing the heater element and thermostat ensures that the machine can heat water efficiently, improving wash performance and energy efficiency.
Steps Involved
- Locate the Heater Element: The heater element is typically located at the bottom of the drum. Remove the back or front panel of the machine to access it.
- Test Heater Continuity: Use a multimeter to test the heater element for continuity. The element should show continuity between its terminals when not in operation.
- Check Heater Resistance: Measure the resistance of the heater element using a multimeter. The resistance should match the specifications in the machine’s manual (usually between 20-60 ohms).
- Inspect the Thermostat: Locate the thermostat (usually near the heater element) and test it for continuity using a multimeter. The thermostat should show continuity when the temperature is below the set point and no continuity when the temperature is above the set point.
- Test Thermal Fuse: If your machine has a thermal fuse, test it for continuity using a multimeter. The fuse should show continuity when not blown.
- Verify Control Board Signal: Use a multimeter to verify that the control board is sending power to the heater element during the wash cycle.
Potential Results
- Faulty Heater Element: If the heater element does not show continuity or the correct resistance, it may need to be replaced.
- Defective Thermostat: If the thermostat does not show continuity or clicks incorrectly, it may need to be replaced.
- Blown Thermal Fuse: If the thermal fuse does not show continuity, it may need to be replaced to restore heating functionality.
- No Power to Heater: If the control board is not sending power to the heater element, the issue may lie with the board or wiring.
A properly functioning heater element and thermostat ensure that the washing machine can heat water to the desired temperature, improving wash performance and energy efficiency.