FieldBench
Trane codes

Trane

Heat fail

Lockout

Reliatel heat fail

Heat section did not prove.

Walk Heat 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 Heat fail exactly. Watch one full sequence and note which step dies. Ignition module path. Reliatel reports the fail — the IGC/IGN still has the LED.

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

  • W at Reliatel, then the ignition module in the heat section.
  • Inducer, PS, HSI, valve, flame — same physics as any packaged IGC, Reliatel just reports ‘heat fail.’
  • Do not replace RTRM because a rollout is open.
  • Ignition module path. Reliatel reports the fail — the IGC/IGN still has the LED.

Plates that use Heat fail