Quick diagnosis
What this code is telling you
Most likely trigger
water supply or valve issue
Recommended replacement
Water / Ice Maker System
Diagnostic path
3 ordered checks
Part fit
Exact model number required
Safety first
Before opening the appliance
Disconnect electrical power before removing panels or handling internal components. Do not bypass safety devices or perform live electrical testing unless you are qualified to do so.
Read the full safety disclaimerRoot cause
Why the control reported this error
LG lists code 33 among refrigerator diagnostic codes; on affected models it indicates a water/ice-system fault requiring model-specific diagnosis because water supply or valve issue. ice-maker water circuit fault and model-specific sensor or control fault can produce the same code, so verify the fault before replacing components.
Possible causes
Check the most likely causes first
- 1
water supply or valve issue
Start here when it matches your symptoms.
- 2
ice-maker water circuit fault
- 3
model-specific sensor or control fault
Diagnostic sequence
Work through these checks in order
Stop when you find the fault. Do not perform a step that requires skills or live testing you are not qualified to do.
- 1
Check 1
Record the code before resetting power.
- 2
Check 2
Confirm the refrigerator water supply is on and there are no visible leaks.
- 3
Check 3
Use the exact model number to locate the service meaning for code 33.
Replacement part reference
Water / Ice Maker System
Exact OEM part number
Model number required
Fitment note
The exact OEM part number varies by model and production revision. Verify the complete model number before ordering.
Verify the appliance model before ordering.
Manufacturers can use different parts under the same error code across model families and production revisions.
Where do I find my model number? →FixCodeDB may earn a commission from qualifying purchases made through affiliate links.
Common questions
Quick answers for this fault
What should I check first for 33?
Start with water supply or valve issue. If that checks out, continue through the diagnostic sequence above rather than replacing a part based on the code alone.
Does 33 always mean Water / Ice Maker System is bad?
No. An error code identifies the condition the control detected, not a guaranteed failed part. Confirm the likely causes and wiring first. The exact OEM part number varies by model and production revision. Verify the complete model number before ordering.
When should I stop troubleshooting 33 myself?
Stop if the next step requires live electrical testing, sealed-system work, gas or combustion service, or any procedure outside your training. Disconnect electrical power before removing panels or handling internal components. Do not bypass safety devices or perform live electrical testing unless you are qualified to do so.
Was this useful?
Did these checks help with your LG 33 error?
Keep diagnosing
Related LG guides
LG code 22 is associated on affected refrigerators with a compressor-start or relay-related fault.
LG code 67 indicates a door gap or door-related condition on affected refrigerators.
LG lists 88 as a refrigerator diagnostic code that requires model-specific interpretation.
Er FF code signals a failure in the freezer evaporator fan motor circuit or ice buildup blocking fan operation.
Different problem?
Search another code or symptom
Go back to the main diagnostic search and try the code, symptom, appliance, component, or brand.
Open diagnostic search →