<<< It keeps beeping with all 4 bars indicating there is a problem with flow >>>
<<< It also heats and drys just fine. any ideas? >>>
The Air Flow Indicator is primitive
In theory---if there's a partial or full blockage of the exhaust vent---then "bars" will be displayed on the control panel
The problem with this type of "system"---which uses the Temperature Sensor (Thermistor) on the blower housing---is that there is no method/capability of determining whether or not the LINT FILTER is becoming more and more restricted with lint. Or that the laundry load is very large (reduced airflow)
For diagnostics purposes---this "data" is useless---especially in the older LG dryers.
Newer models have improved---possibly by modifying the software parameters. I'm not sure yet.
For your dryer (DLE5955)---ignore the Air Flow Sensor---except perhaps when testing the dryer with an *empty* drum.
Even then---this should not be considered a definitive diagnostics tool
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