If your Trane heat pump isn’t working as expected, LED codes can provide valuable clues about what’s wrong. This article breaks down the most common Trane heat pump LED codes, what they mean, and the best ways to resolve issues. Learn how to read your unit’s flashes, improve efficiency, and make informed service decisions with this comprehensive homeowner’s guide.
Common Trane Heat Pump LED Code Summary
| LED Code | Description | Recommended Action |
|---|---|---|
| Off/No Light | No power or blown fuse | Check power, breakers, fuses |
| Continuous On | Normal operation | No action needed |
| Fast Flashing | Error/Fault detected | Identify specific code, troubleshoot as indicated |
| Slow Flashing | Lockout or soft lockout | Reset unit, call technician if persists |
| Two Flashes | Pressure switch open | Check airflow, filters, call for service |
| Three Flashes | Limit switch open | Check ducts/obstructions, call technician |
| Seven+ Flashes | Board or sensor failure | Service needed |
How Trane Heat Pump LED Codes Work
Every Trane heat pump has a control board with diagnostic LED lights—usually inside the outdoor or indoor unit’s access panel. These codes help homeowners and technicians quickly identify system faults or operational status. Each pattern of flashes means something specific, from normal operation (a steady light) to major system faults (multiple flashes). Knowing how to interpret these codes can speed up troubleshooting and minimize downtime.