A pressure switch is an electrical device that controls the operation of a pump or compressor based on the pressure level in a system. It is commonly used in various applications such as water systems, air compressors, and heating systems.. How to Assemble, Replace, Wire & Adjust an Air Compressor Pressure Switch. You will walk through the whole process of how I discover where an air leak is co.
Safety first: Before anything else, switch off the compressor and unplug it from the power source. Identify pressure switch terminals: A pressure switch should have clearly marked terminals or contacts.There are at least four — two for power input and two for power output to the motor. Understand the wiring diagram: Pressure switches typically come with a wiring diagram.. If you're new to the world of electrical work, the thought of wiring a pressure switch for a 220-volt system may seem daunting. But fear not, it's actually a straightforward process that just requires a bit of caution and careful planning.