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Trane Furnace Diagnostic LED Code

Trane XR80 furnace provides a LED on its integrated furnace control for quick diagnostic. Here is its diagnostic code:

LED Flash Error
Flashing Slow Normal No Call for Heat
Flashing Fast Normal Call for Heat
Continuous On Replace Control
Continuous Off Check Power
2 Flashes External Lockout (Retries or Recycles Exceeded)
3 Flashes Pressure Switch Error
4 Flashes Open High Limit Device
5 Flashes Flame Sensed when NO flame should be present
6 Flashes 115 VAC power reversed polarity or poor grounding
7 Flashes Gas Valve circuit Error
8 Flashes Low Frame sense Signal
9 Flashes Check Ignitor

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