Why Your Atlas Copco GX Compressor Overheats (and How to Fix It)

stationaryGreg Aiken
Why Your Atlas Copco GX Compressor Overheats (and How to Fix It)

Why Your Atlas Copco GX Compressor Overheats (and How to Fix It)

Overheating is a leading cause of downtime and expensive repairs for rotary screw compressors like the Atlas Copco GX series. While these units are designed to run reliably, certain issues can cause temperatures to climb quickly. And many of these issues are preventable.

Common Causes of Overheating

1. Dirty or Blocked Coolers

Dust buildup on oil coolers and aftercoolers restricts airflow and heat exchange. Without proper cleaning, your oil temperature rises, risking thermal breakdown and airend damage.

2. Low or Degraded Oil

Oil not only lubricates but also helps remove heat from the airend. Running with low oil levels or old, degraded oil reduces heat transfer and can lead to rapid overheating. Always use fresh Roto-Inject Fluid (1630091800) and change it on schedule.

3. Restricted Airflow Around the Compressor

Placing your GX in a tight or poorly ventilated space can trap hot air, preventing proper cooling. Make sure there is adequate clearance around all sides and that exhaust air can escape freely.

4. Clogged Air Filters

Dirty air filters make the compressor work harder and disrupt internal cooling airflow. Replace filters at recommended intervals or sooner if operating in dusty environments.

5. Faulty Cooling Fan or Thermostatic Valve

If the cooling fan isn’t working or the thermostatic valve is stuck, oil may bypass the cooler completely, causing immediate temperature spikes. Inspect and replace these components during major service intervals.

Prevent Overheating with Routine Checks

  • Clean coolers and check for dust buildup regularly.
  • Maintain proper oil levels and replace on schedule.
  • Ensure adequate room ventilation and avoid blocking air paths.
  • Check air filters and cooling fan operation consistently.

Stay Cool and Avoid Downtime

By tackling these common causes early, you’ll extend your GX compressor’s life, improve efficiency, and reduce the risk of costly breakdowns.

Need oil, filters, or cooler components? Check out our Atlas Copco parts collection to keep your GX compressor running cool and dependable.

Disclaimer: The information provided in this blog is intended for general troubleshooting guidance only and may not cover every situation or machine configuration. Always refer to your specific equipment’s manual and follow the manufacturer’s safety instructions. If you are unsure or uncomfortable performing any maintenance or repairs, consult a qualified technician. Air Compressor Services is not responsible for any injuries, damages, or losses resulting from the use of this information.