FieldBench
Lennox codes

Lennox

E207

Lockout

HSI sensed open

Hot-surface ignitor circuit measures open.

Walk E207 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. Cold ohms at the ignitor, then at the IFC. Replace if open or out of the IOM range.

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

The rest of the walkthrough is Diagnose.

On the plates

  • Cold ohms at the ignitor, then at the IFC. Replace if open or out of the IOM range.
  • Harness rub-through on the collector is common on these cabinets.
  • Cold ohms, then 120 VAC during trial. Same ignitor family as EL296V.

Plates that use E207