A.O. Smith Error Code LOC: Controls Locked
How to Fix A.O. Smith Code LOC
- Step 1: Check the owner's manual for specific instructions on how to unlock the control panel. Some models have a button combination or a sequence of presses to unlock.
- Step 2: Try cycling power to the water heater by turning off the breaker for a few minutes, then turning it back on. This may reset the control board and clear the lock.
- Step 3: If the above steps don't work, contact a qualified HVAC technician to diagnose and unlock the control panel. Do not attempt to disassemble or repair the unit yourself.
What Does A.O. Smith Error Code LOC Mean?
The 'LOC' error code on your A.O. Smith water heater indicates that the control panel has been locked. This feature is designed to prevent unauthorized changes to the water heater's settings. When locked, the unit will typically not respond to button presses or temperature adjustments, effectively disabling its normal functionality. This lockout can occur for several reasons, including accidental activation of the lock feature, a software glitch, or as a safety measure triggered by an underlying issue within the water heater. Because the unit is locked, you won't be able to adjust the temperature or access diagnostic information until it's unlocked. This usually requires specific knowledge of A.O. Smith control systems.
Common Causes of A.O. Smith Code LOC
- Accidental activation of the control lock feature.
- Software glitch or error within the control board.
- Low voltage or power surge causing the control board to lock up.
- Internal fault detected by the control system as a safety measure.
Applicable A.O. Smith Models
Need a Pro to Fix A.O. Smith Code LOC?
A licensed HVAC technician can diagnose and fix this issue quickly.
Find a Licensed Tech Near You →