Replace the low air pressure switch. This is normally a closed swith til it reaches somewhere around 90 lbs or air pressure than it opens to silence the buzzer and turn off the warning lite.
[h=3]Low Air Pressure Switch - Image Results[/h] [TABLE] [TR="class: thmb"] [TD="width: 119"][/TD] [TD="width: 101"][/TD] [TD="width: 102"] Heres a couple of pics of the different styles.[/TD] [/TR] [/TABLE]