FieldBench
Lennox codes

Lennox

E272

Lockout

Soft lockout — last recycle PS opened

Ran, then draft dropped.

Walk E272 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 E272. Is the inducer spinning on this call? Silent inducer is not a pressure switch. It ran, then draft dropped. Wind, ice, trap siphon, inducer after light-off.

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

  • It ran, then draft dropped. Wind, ice, trap siphon, inducer after light-off.
  • Same two-hose / port-clean as the E223 cluster.
  • Same two-hose / port-clean cluster.

Plates that use E272