To test a water heating element, you primarily check its electrical resistance using a multimeter. This simple test helps determine if the element is likely working correctly.
Testing a Water Heating Element
A common method to test the functionality of a heating element in appliances that heat water, like water heaters or dishwashers, involves measuring its resistance. A properly functioning element will allow current to flow within a specific range of resistance.
What You Need
- Multimeter: A tool capable of measuring electrical resistance (Ohms).
- The heating element you wish to test.
Steps to Test the Element
Follow these steps to check the resistance of a heating element, such as an upper heating element in a water heater:
- Use a multimeter. Set your multimeter to the Ohms (Ω) setting, typically the lowest range first, then adjust if needed.
- Measure the resistance between the two screw terminals on the heating element. Place the multimeter probes on the two main connection terminals where the power wires attach.
- Check the reading. A good element will have a resistance reading that falls within a specific range. Based on typical specifications, a good element will show a resistance between 5 and 25 Ohms.
Interpreting the Results
- If the resistance reading is between 5 and 25 Ohms, the element is likely in good condition electrically.
- If the reading is significantly higher, infinite (often displayed as 'OL' or '1' on the multimeter screen, indicating an open circuit), or very low (close to 0 Ohms, which might suggest a short circuit), the element is likely faulty and needs replacement.
Testing resistance is a fundamental step in diagnosing issues with water heating elements, indicating whether the electrical path required for heating is intact.
