FieldBench
Lennox codes

Lennox

E223 / E225

Lockout

Pressure / inducer band

Modulating prove failed at that rate. Stat may say low/high PS even though the hardware is a band, not two EL296 discs.

Walk E223 / E225 in Diagnose

2 plates — walk the one on the cabinet

First check

1 Prove inducer and the live code

Do not pull power — that clears the Lennox SL297NV active code. Write E223 / E225. Is the inducer spinning on this call? Silent inducer is not a pressure switch. Vent, trap, inducer, hose. 96% PVC physics.

Expect: 120 VAC at the inducer on a heat call. Wheel turning.

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

  • Vent, trap, inducer, hose. 96% PVC physics.
  • Do not treat it as a two-stage W1/W2 swap.

Plates that use E223 / E225