FieldBench
Lennox codes

Lennox

E226

Lockout

High PS failed CLOSED

High switch made when it should be open.

Walk E226 in Diagnose

4 plates — walk the one on the cabinet

First check

1 Prove the switch is made with inducer not on high

On Lennox EL195NE this code means the high-fire switch is closed when it should be open. Do not treat it as the low-fire stuck-closed code. Write the live display, then unplug the high-fire switch only.

Expect: Code should change when the high-fire harness is open.

If fail: IFC input shorted or you unplugged the wrong switch.

The rest of the walkthrough is Diagnose.

On the plates

  • Unplug the high switch only. Water or a welded disc.
  • W2 shorted so the IFC thinks it should already be in high.
  • Unplug the high switch. Residual draft or welded disc.

Plates that use E226