FieldBench
Trane codes

Trane

Fan fail

Lockout

Reliatel fan fail

Indoor fan did not prove.

Walk Fan fail in Diagnose

2 plates — walk the one on the cabinet

First check

1 Write the live code and watch one cycle

On Trane YHC read Reliatel — Precedent YHC before you pull power. Write Fan fail exactly. Watch one full sequence and note which step dies. YHC often has a different motor/VFD than YSC. Use this blower table.

Expect: Call: Occupied / G starts the indoor fan. Y1 is cool. W is gas heat. They are different boards in the same box.

The rest of the walkthrough is Diagnose.

On the plates

  • Belt, ECM, or the proving pressure switch / current sensor.
  • VFD limp mode can drop static below the prove setpoint. That is not a bad RTRM.
  • YHC often has a different motor/VFD than YSC. Use this blower table.

Plates that use Fan fail