FieldBench
Lennox codes

Lennox

E311

Protect

Blower temperature too high

Blower / module overtemp. IFC sheds or parks heat.

Walk E311 in Diagnose

2 plates — walk the one on the cabinet

First check

1 Airflow before you touch the limit

On Lennox EL195NE a limit is airflow or overfire until proven otherwise. Do not replace the limit first. Filter, blower wheel, A-coil, and the heat-speed setting for THIS motor (tap, model plug, or communicating CFM — not a sister SKU chart). Static, wheel rub, module fins packed with dust.

Expect: Rise in the rating-plate window. Static vs this cabinet’s blower chart.

The rest of the walkthrough is Diagnose.

On the plates

  • Static, wheel rub, module fins packed with dust.
  • After a motor swap, confirm you did not put an EL296E CT motor in this VS plug.

Plates that use E311