FieldBench
Lennox codes

Lennox

E290

Lockout

Ignitor circuit fault

Failed ignitor or trigger circuit.

Walk E290 in Diagnose

4 plates — walk the one on the cabinet

First check

1 Ohms at the igniter, then at the IFC

On Lennox EL195NE measure cold ohms at the igniter plug, then at the IFC connector. An open at the plug is the element or local harness. Open only at the IFC is the harness rub-through on the collector. Ohms the HSI. Open / out of IOM range = replace the ignitor.

Expect: HSI: Cold ohms in the IOM range. 120 VAC during trial.

The rest of the walkthrough is Diagnose.

On the plates

  • Ohms the HSI. Open / out of IOM range = replace the ignitor.
  • Good ohms + no 120 VAC during trial = IFC / harness.
  • HSI ohms and 120 VAC during trial.

Plates that use E290