A.O. Smith Error Code LWR: Lower Element Fault
How to Fix A.O. Smith Code LWR
- Step 1: Check the water heater's circuit breaker in your electrical panel. Ensure it hasn't tripped. If it has, reset it. If it trips again immediately, do not reset it again and call a qualified technician.
- Step 2: If the breaker is fine, check the reset button on the water heater (usually a red button near the top). Press it firmly. If it clicks, that indicates the high limit switch had tripped. This might restore operation, but it's still important to have a technician investigate the underlying cause.
- Step 3: If the problem persists after checking the breaker and reset button, contact a qualified HVAC technician or electrician to diagnose and repair the issue.
What Does A.O. Smith Error Code LWR Mean?
The 'LWR' error code on your A.O. Smith water heater indicates a problem with the lower heating element circuit. The control board monitors the electrical current flowing through the heating elements. If it detects a short circuit, open circuit, or other electrical anomaly, it will display this error and shut down the element to prevent further damage or potential fire hazard. This usually means the element has failed, or there's a wiring issue. Because the water heater relies on both elements to properly heat water, a fault in one will prevent the unit from operating correctly. The lower element is especially important as it heats the larger volume of water at the bottom of the tank.
Common Causes of A.O. Smith Code LWR
- Failed lower heating element (most common)
- Loose or corroded wiring connections at the lower heating element
- Sediment buildup on the lower heating element causing it to overheat and fail
- Faulty thermostat or high limit switch preventing proper element operation
- Defective control board not properly reading the current draw of the lower element
Applicable A.O. Smith Models
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