FieldBench
Lennox codes

Lennox

F

Status

Flame signal

Menu: live flame current in µA on the 7-seg.

Walk F in Diagnose

2 plates — walk the one on the cabinet

First check

1 Measure µA while it is running

Do not clean first and guess. Series-µA the rod on Lennox EL195NE during a call. Falling µA is oxide, ground, or a dying flame. A hard drop is often the pressure switch or limit opening, not the rod. Use this on an E240 / E270 call instead of guessing the rod.

Expect: Flame (F menu): µA per EL296 card. Rising while running.

The rest of the walkthrough is Diagnose.

On the plates

  • Use this on an E240 / E270 call instead of guessing the rod.
  • Exits on power reset, hold-to-bars, or 10 minutes.

Plates that use F