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Error code reference

LG Refrigerator Error Code tt

Water tank not assembled correctly or water tank hall switch abnormal (lead wire, hall switch, or Main PCB defective).

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What the tt error code actually means

Your LG refrigerator is showing a tt error because it cannot detect that the internal water tank is properly installed, or there is a problem with the small sensor that checks the tank's position. This could be as simple as the water tank being slightly out of place, or it could mean a sensor or wiring issue inside the refrigerator. Try reseating the water tank first before assuming a more serious repair is needed.

Diagnostic procedure

The full tt procedure

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1
First diagnostic step
Check water tank assembly and hall switch connection.
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Most common causes of tt

Ranked by how often they cause this code
  1. 1Water tank not fully or correctly seated
  2. 2Damaged or disconnected lead wire
  3. 3Faulty hall switch
  4. 4Main PCB defective

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Questions people ask about tt

What does tt mean on a LG refrigerator?
The tt error code on an LG refrigerator indicates that the water tank is either not assembled correctly or the hall switch that detects the tank position is not functioning properly. The fault can involve the tank itself, the lead wire to the sensor, the hall switch, or in rarer cases the main control board. The refrigerator displays this code when it cannot confirm the water tank is properly seated and detected.
Will resetting my LG refrigerator clear the tt error code?
A reset may temporarily clear the tt code from the display, but it will return if the underlying cause is not addressed. If the water tank simply shifted out of position, reseating it and resetting the unit may resolve the issue permanently. For hardware faults like a failed hall switch or damaged wiring, a reset alone will not fix the problem.
How much does it cost to repair the tt error code on an LG refrigerator?
If reseating the water tank resolves the error, there is no parts cost involved. Replacing a hall switch or lead wire harness is generally a lower cost repair, with parts typically ranging from $15 to $60 and labor costs varying by region. A main PCB replacement is the most expensive scenario, with parts and labor potentially ranging from $200 to $500 or more depending on the model and service provider.
How do I fix the tt error code on my LG refrigerator?
Start by removing the water tank and reinstalling it firmly to ensure it is fully seated. If the error persists, inspect the lead wire and connector for the hall switch for any visible damage or loose connections. If the wiring looks intact, the hall switch itself may need to be tested and replaced. If all components check out, a qualified technician should evaluate the main PCB.
Is the tt error code on my LG refrigerator a safety concern?
The tt error is not typically a safety hazard. It relates to the water tank detection system and does not directly affect cooling or food preservation. However, depending on your model, it may prevent the water dispenser from functioning properly until the issue is resolved. Addressing the fault promptly is still recommended to avoid any secondary issues from ignored wiring problems.

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