Confirm the filter is the exact one
Check the complete model number and filter number. A filter that fits the opening but is not listed for the model can restrict flow or fail to seal. Keep model variants such as /01 and AA intact.
Flush and reset as directed
Manufacturers commonly instruct owners to flush a new cartridge and reset the filter indicator, but the required procedure varies. Follow the manual or the filter’s official instructions rather than applying one universal volume or time.
Use the manufacturer’s diagnostic path
LG identifies the filter, household water supply, and water line as possible causes of slow dispensing. GE likewise recommends testing with the bypass plug when its instructions identify a clogged filter as a possible cause.
If flow remains slow after the documented checks, stop treating the filter as the only possible cause and use the manufacturer’s service guidance.