Trane TUH1B080A9H31A Furnace Error Codes

Single Stage Gas Furnace | Control Board: Integrated Furnace Control (IFC)

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Disclaimer
This information is for reference purposes only and does not guarantee accuracy or completeness. Always consult your owner's manual and a licensed HVAC technician for diagnosis and repair. Any actions taken based on this information are at your own risk.

All Error Codes

Code Name Severity DIY?
Slow Flash Normal - No Call for Heat Info — →
Fast Flash Normal - Call for Heat Info — →
Continuous ON Replace IFC High ✗ Call a pro →
Continuous OFF Check Power High ✓ Yes →
2 Flashes External Lockout (Retries or Recycles Exceeded) High ✗ Call a pro →
3 Flashes Pressure Switch Error High ✗ Call a pro →
4 Flashes Open Limit Device High ✓ Yes →
5 Flashes Flame Sensed When No Flame Should Be Present High ✗ Call a pro →
6 Flashes 115V AC Power Reversed or Poor Grounding Low ✗ Call a pro →
7 Flashes Gas Valve Circuit Error High ✗ Call a pro →
8 Flashes Low Flame Sense Signal Low ✗ Call a pro →
9 Flashes Check Igniter High ✗ Call a pro →

How to Read the Error Code

The Integrated Furnace Control (IFC) has a diagnostic LED that communicates furnace status and error conditions through flash patterns. A slow flash indicates normal standby, a fast flash indicates an active call for heat, and numbered flash sequences (2 through 9) indicate specific fault conditions.

About This Model

The Trane TUH1B080A9H31A is a single stage gas furnace using the Integrated Furnace Control (IFC) control board.