FieldBench
Lennox codes

Lennox

E275

Hazard

Flame out of sequence lockout

Soft lockout after out-of-sequence flame. Same hazard family as E241.

Walk E275 in Diagnose

2 plates — walk the one on the cabinet

First check

1 Shut the gas cock first

On Lennox EL195NE the rod sees flame with the valve de-energized. Shut the cock. If flame stays, the valve is leaking — replace it. Do not jump or energize it as a test. Shut the cock. Valve leak or IFC flame circuit.

Expect: Flame dies when the cock is shut.

If fail: Leaking valve. Replace. Do not leave the unit.

The rest of the walkthrough is Diagnose.

On the plates

  • Shut the cock. Valve leak or IFC flame circuit.
  • 1-hour-class lockout. Do not keep resetting.

Plates that use E275