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How can I change the high/low or on/off points on a 9013 pressure switch?
9013 pressure switches
It is sometimes necessary to change the pressure settings on the switches from what they have been preset
On all 9013 pressure switches there are one or two adjustment nuts holding a spring inside of the cover. With the power disconnected to the switch, these nuts can be adjusted to change the pressure switch. On units with one adjustment nut, this adjustment will change the high and low setting at the same time. On units with two adjustment nuts, the larger spring controls the high and low setting. The smaller spring controls the differential (spread) between the high and low points. Reference the attached troubleshooting guide for specific adjustment instructions.