FieldBench
Lennox codes

Lennox

E271

Lockout

Soft lockout — last retry failed because PS opened

Last try died on a pressure switch.

Walk E271 in Diagnose

4 plates — walk the one on the cabinet

First check

1 Prove inducer and the live code

Do not pull power — that clears the Lennox EL195NE active code. Write E271. Is the inducer spinning on this call? Silent inducer is not a pressure switch. Treat as a hardened E223 / E227. Port, trap, PVC, inducer.

Expect: Inducer port: Open to the collector, not packed with oxide. Two hoses, never teed.

If fail: 120 VAC missing → IFC / door switch / incoming power. Voltage + dead motor → inducer.

If pass: Inducer running + this code → trap, hose, switch, vent (step 2).

The rest of the walkthrough is Diagnose.

On the plates

  • Treat as a hardened E223 / E227. Port, trap, PVC, inducer.
  • Do not replace the ignitor because the stack says 270-family.
  • Hardened E223 / E227. Port, trap, PVC.

Plates that use E271