Why Air Compressors Trip Breakers & How to Fix

Why Air Compressors Trip Breakers & How to Fix

If you use a portable or reciprocating air compressor and find it keeps tripping your breakers, you’re not alone. This is one of the most common electrical headaches for shop owners and DIYers alike. The good news? It’s often fixable with a few targeted checks.

1. Overloaded Circuit

Air compressors draw a lot of power on startup. If the circuit you’re using doesn’t have enough capacity (or is shared with other tools), it can easily overload and trip the breaker. Try plugging into a dedicated circuit rated for your compressor’s amp draw.

2. Faulty Motor or Start Capacitor

If the motor or start capacitor is failing, your compressor may pull more amps than normal, causing breaker trips. Look for signs like humming, slow starts, or failure to spin up properly.

3. Undersized Extension Cords

Long or thin extension cords increase resistance, which makes your compressor work harder to get power. Always use a heavy-duty cord rated for your compressor’s needs, or avoid extension cords altogether when possible.

4. Clogged Air Filters

Dirty or clogged air filters make the compressor work harder, putting more load on the motor and electrical system. Check and replace your filters regularly to avoid unnecessary strain.

5. Mechanical Binding or Seized Pump

Internal mechanical issues, like a binding piston or seized pump, can cause excessive amp draw and trip the breaker. If you suspect this, stop running the compressor and inspect it before further use.

Quick Recap

• Use a dedicated, properly rated circuit
• Check the motor and start capacitor
• Avoid using undersized extension cords
• Inspect and replace clogged air filters
• Address any mechanical issues immediately

By checking these common causes, you can often solve breaker-tripping issues yourself and keep your work moving forward without interruptions.