An HVAC company’s primary aim is to provide service to their customers for their air conditioning system’s proper functioning. However, a homeowner needs to have essential tools for easy repair and replacement of air conditioning parts. A refrigeration gauge is an important tool for testing leakage in an air conditioning system. There are different refrigeration gauges for different use. Sometimes, coils in the air conditioning unit bend. A coil fin straightener is an essential tool used to straighten the fins without warping them further. To test air conditioning performance, you need the help of a specialised digital thermometer.