FieldBench
Lennox codes

Lennox

E270

Lockout

Soft lockout — max retries, no flame current

Never saw flame current.

Walk E270 in Diagnose

4 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. Watch a try: inducer, HSI glow, valve click, flame, then F-menu µA. Which step dies?

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

The rest of the walkthrough is Diagnose.

On the plates

  • Watch a try: inducer, HSI glow, valve click, flame, then F-menu µA. Which step dies?
  • This is ignition, not rollout. The older field rumor that E270 ‘is rollout’ is wrong on this SureLight family — rollout lives in the E250 / E274 string.
  • Watch a try. HSI, gas, rod. Not rollout.

Plates that use E270