Model reference
Trane UH2D120A9V5VA
Furnace
2 documents12 error codes3 service modes
Available documentation
Tech Sheet
- Service Facts44 pg
Installation Guide
- Installer's Guide44 pg
MyPros+ Max
Diagnose your Trane UH2D120A9V5VA.
- Step-by-step diagnostics from the service manual
- Test values, resistance specs, and wiring references
- Verified part numbers when replacement is needed
Start diagnosing
$29/month · Cancel anytime · Or $9.95 3-day pass
Error codes (12)
CodeMeaning
1 Flash (Red)Normal LitePort data transmission2 FlashRetries or recycles exceeded3 FlashInducer or pressure switch error4 FlashOpen limit switch or rollout switch5 FlashFlame sensed when no flame should be present.6 FlashLine reverse polarity7 FlashExternal gas valve circuit error8 FlashWeak flame9 FlashOpen inducer limit errorGreen Fast FlashNormal operation, call for heat present.Green Slow FlashNormal operation, no call for heat.Green/Red LEDs on continuouslyFuse open or internal control failure.Service modes (3)
- ECM-2 Troubleshooter Kit Diagnostic1
- Fault Code Recovery / DisplayOn power up, the last 4 faults (if any) will be flashed on the red LED automatically
- Fault Code ResetPower up the control with 'G' energized, then apply 'R' to the 'W1' terminal 3 times within 6…
Full entry steps, exit procedures, and test sequences are available in Max.
Related Trane furnace models
78,000+ service manuals · 160,000+ error codes · 55+ brands
Get Started$29/month · Cancel anytime · Or $9.95 3-day pass