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Tips for Adjusting Pressure Switches

Sometimes a factory may find that it needs to adjust the air compressor switch on the various equipment inside the factory. However, many air compressor switches have warning labels that specify that if the switches are adjusted by factory personnel, the adjustment could void the warranty. However, if you adjust the switch using the correct procedure, it is unlikely that the warranty will be voided. Always check with your particular warranty details before changing any pressure valves or making any other manual adjustments to an air compressor switch.

If you must adjust the switch on your own, look inside the cover for detailed instructions on how to adjust the switch. Most compressor switches have a small sticker inside the cover that details the process. Unscrew the cover from the switch itself and examine the instructions before making any adjustments.

Generally, there are a few basic adjustment techniques that will work with all pressure switches. The range screw adjusts the amount of pressure that can go through the air compressor. Identify the range of your particular compressor before adjusting this level. The range screw is located in the front of the compressor switch, and it typically has markings that identify different pressure ratings. Move the switch to the desired pressure rating slowly to change the amount of pressure that travels through the air compressor. Some switches do not have pressure labels. If your unit does not have a label, then you will have to turn the switch one or two times clockwise or counterclockwise, then check the pressure rating on the system gauge of the air compressor. Take care not to increase the pressure beyond the top rating for that particular compressor.

Adjusting air compressor switches is not difficult, but there are many things that can go wrong. If you are uncomfortable adjusting the pressure yourself, contact the unit manufacturer and they can come and adjust the pressure for you.