Air compressor never shuts off

[Greg Needel]

how is your system setup because the pump should put out about 120psi and if it is only putting out 65-70 then that explains why the pressure switch isn;t working because it only activates when pressure is above 110 psi and re activates when pressure is less then 90psi My sugestion is to check the following:

the gauge should be off of one of the storage tanks not off the pump directly

check for leaks

check the location of the regulator and make sure it isn't restricting the flow before the tanks because you are alowed to store up to 120 psi in the tanks but only have 60 in the system

I guess my major recomendation is to just check your setup vs the one in the pneumatics guide and see if something is set up wrong