Air compressor switches are crucial elements in determining the amount of pressure that your machine will obtain while simultaneously ensuring that the unit itself functions properly.

However, there can be times when this switch may need to be adjusted in order to accommodate specific needs. The good news is that this can be done manually if the proper steps are followed.

Let us look at what this process entails so that frustrating setbacks and even mechanical damage can be avoided.

Setting Cut-In and Cut-Out Levels

These are the low and high thresholds associated with a pressure switch for compressors. The majority of compressors will contain two screws normally found quite close to the switch itself. As a general rule of thumb, the larger of the two represents the cut-in (lowest) pressure.

This is the amount of pressure required for the compressor to activate. The smaller screw can be adjusted to change the cut-out (maximum) pressure. The main takeaway point here is that any adjustment to the larger screw will affect the pressure levels of the smaller screw.

This is due to the fact that they are set to function within a fixed value of one another. Thus, remember that the values of the smaller screw will be modified any time changes are made to its larger counterpart.

Additional Suggestions

Always be certain that the tank is completely empty before attempting to adjust the pressure switch. This can be accomplished by allowing the compressor to run until it reaches the cut-out level. It is also wise to write down the cut-in and cut-out pressures before they are changed.

This will allow you to readjust them to previous levels if required. In the event that either screw cannot be turned or the switch gives faulty readings after the adjustment has been made, it may be faulty and need to be replaced. PMJ International supplies a wide range of accessories including air compressor switches.

On a final note, it may take several attempts before the correct pressure is achieved. This is why a bit of trial and error could be necessary on occasion.