3540 Air Dryer purging non stop intermit ~~~~~ 3540 Air Dryer purging non stop intermittently.  3540 Replaced faulty Air Dryer. Function test - OK. No air leak during changeover. #3540 Air Dryer S/N : O: 3514470246 N: 3515370307  Sarma/Sugu/Alan/Kamarul/Anand/Shafie 45299 Note: 3540 TT Last Change 26/12/23 (TWD)