Carbon and sludge in the oil circuit reduce cooling and can block the separator, thermostat and valves. The root causes are heat, contaminated oil and extended drain intervals.
Why Carbon Forms
- High discharge temperature oxidizes the oil
- Dust ingestion thickens and degrades oil
- Overdue oil changes allow deposits to build
Where It Accumulates
The oil cooler, separator element and control valves are the most common places for carbon to restrict flow.
Prevention
- Keep discharge temperature in the normal range
- Use the correct compressor oil
- Follow oil and filter change intervals
- Keep intake filtration effective
Cleanup
Flush the system with approved flushing oil and replace filters after addressing the root cause of overheating or contamination.