FieldBench
Lennox codes

Lennox

E228

Lockout

Combustion air inducer calibration failure

Could not finish PS calibration.

Walk E228 in Diagnose

4 plates — walk the one on the cabinet

First check

1 Is the wheel free?

Spin the Lennox EL195NE blower by hand. Ice, debris, or a seized bearing is not a control problem. Confirm the motor type on this plate — serial ECM, 9-speed tap, or X-13 — before you grab a capacitor. Vent and both hoses seated. Inducer must be able to sweep both switches.

Expect: Wheel free. Correct motor family for this IFC.

The rest of the walkthrough is Diagnose.

On the plates

  • Vent and both hoses seated. Inducer must be able to sweep both switches.
  • Fix E223/E225 physics first — calibration will not pass on a clogged port.
  • Fix the port and hoses first. Calibration will not pass on a clogged collector.

Plates that use E228