FieldBench
Trane codes

Trane

E3.2 / E3.4

Lockout

Open first/second-stage PS (door-card confirm)

If these decimals are on THIS S9V2 door they are the OPEN first- / second-stage PS counterparts to the confirmed shorted E3.1 / E3.3. Do not assert an unconfirmed OEM title — read the exact door line / service facts.

Walk E3.2 / E3.4 in Diagnose

2 plates — walk the one on the cabinet

First check

1 Unplug the switch with the inducer off

On Trane S8V2 this code is the switch made when the inducer is not running. Unplug that switch only. This is Category I metal vent. There is no 96% collector or PVC trap to prime.

Expect: Code changes when the harness is open.

If fail: Wrong switch, or the IFC input is shorted.

If pass: Switch/hose path. Go to step 2.

The rest of the walkthrough is Diagnose.

On the plates

  • 96% trap and collector first. A drowned collector will not make either prove.
  • Inducer actually running at that stage? Listen / amp it.
  • Correct hose on the correct tap. Vent/intake ice — S9V2 attics do this all January.
  • Confirm the wording on THIS door card. Nearby decimals are not interchangeable with E3.1 / E3.3.
  • This is Category I metal vent. There is no 96% collector or PVC trap to prime.
  • Cap, liner, common-vent tables, inducer wheel, hose on the inducer housing.

Plates that use E3.2 / E3.4