2025 Best HVAC Tools List: The 10 Must-Have HVAC Tools for Service Techs

Multimeter

Arguably one of the most important tools on this list: the multimeter. It checks for electrical currents and voltage, which means it helps protect you from electrical shocks. You're going to be working with a lot of electricity, so you need to know when wires or outlets are live. A multimeter is the ultimate safety tool in your kit.

Don't skimp on this one. A good multimeter will give you peace of mind when dealing with electrical systems. Make sure it's easy to read and reliable so you can quickly check for voltage.