Bradford White Water Heater Error Code LC

The LC code stands for lime or scale buildup in the heat exchanger. Mineral deposits from hard water accumulate on the internal surfaces of the heat exchanger, reducing its ability to transfer heat efficiently into the water. The control board detects this efficiency loss and displays the LC code to signal that descaling or component replacement is needed. Ignoring this code can lead to premature heat exchanger failure.

Start by turning off the power supply and then reapplying it to see if the code clears. If it returns, separate the control wires from the unit's power supply and flush the heat exchanger with a descaling solution to remove lime and mineral deposits. If flushing does not resolve the code, the heat exchanger itself will need to be replaced. A licensed plumber or appliance technician should perform these steps if you are not comfortable working with the unit.

If the issue can be resolved with a heat exchanger flush, costs are relatively low and typically fall in the range of $75 to $200 for a service call including labor and descaling materials. If the heat exchanger requires replacement, the cost increases significantly and can range from $400 to $900 or more depending on the unit model and local labor rates. Getting a diagnosis before authorizing parts replacement can help avoid unnecessary expenses.

Cycling the power off and back on is the first diagnostic step, but it will not permanently clear the LC code if scale buildup is the actual cause. If the code returns after the power reset, the underlying scale problem must be addressed by flushing the heat exchanger. A reset alone without descaling is only a temporary measure.

The LC code is primarily an efficiency and maintenance alert, but it should not be ignored. Severe scale buildup can cause localized overheating inside the heat exchanger, which over time may lead to component failure or water leaks. Addressing the code promptly by flushing or replacing the heat exchanger helps prevent more serious damage and keeps the unit operating safely.