FieldBench
Lennox codes

Lennox

E227

Lockout

Low PS opened during trial or run

Low switch had closed, then opened mid-trial or in run.

Walk E227 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 E227. Is the inducer spinning on this call? Silent inducer is not a pressure switch. Wind, ice, trap siphon, inducer dropping out 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

  • Wind, ice, trap siphon, inducer dropping out after light-off.
  • Same port-clean as E223 — a half-clogged port will make then drop.
  • Wind, ice, trap siphon, half-clogged inducer port.

Plates that use E227