Compressor Stalls: Top Causes - and Easy Fixes You Can Handle
When your reciprocating air compressor suddenly stalls, it can leave your whole job on hold. Luckily, most stalling issues are easy to identify and fix yourself without waiting for a service call.
Low Voltage or Electrical Issues
Low voltage or a weak electrical supply is a common stalling culprit. During startup, your compressor needs extra power, and a poor setup can’t keep up.
- Verify your supply voltage matches your motor's requirements.
- Check for loose or corroded connections and tighten as needed.
- Use a dedicated circuit to avoid voltage drops caused by other equipment.
Check Valve Problems
A sticking or damaged check valve can create excess back pressure, making it hard for your compressor to start smoothly.
- Inspect the check valve for debris or wear.
- Clean or replace it if needed. A fresh replacement check valve can make a big difference.
Improper Belt Tension or Wear
Loose or overtight belts can overload the motor and cause stalling.
- Adjust the belt tension to match the manufacturer's specs.
- Check for cracks or frays. Grab a new belt if yours is worn out.
Seized or Damaged Pump Components
Internal pump problems can create too much resistance, stalling your compressor right away.
- Manually turn the pump pulley to check for smooth movement.
- If it feels rough or jammed, consider replacing worn parts — we have a full range of pump repair kits and components.
Oil or Lubrication Issues
Low or old oil increases internal friction, which can stop your compressor in its tracks.
- Check oil levels and top off using the correct compressor oil.
- Stay on schedule for oil changes to avoid future stalls.
Keep Moving Without Waiting
Stalls don’t have to slow you down. With the right parts and a little DIY maintenance, you can get your compressor running strong again. No calls or appointments needed.