FieldBench
Lennox codes

Lennox

E206

Protect

Second-stage gas valve relay failure

High-fire solenoid will not drive. OEM: furnace runs first stage only for the rest of the call.

Walk E206 in Diagnose

2 plates — walk the one on the cabinet

First check

1 Let it cool, then read the drive LED

On Lennox EL195NE overcurrent / overheat is often a dirty coil, a failed OD fan, or a locked compressor — not a dead inverter. Clear airflow, confirm the OD fan, and read the drive LED before you order a control. W2 present? 24 VAC at stage-2 coil on a high call.

Expect: OD fan running. Coil clean. Drive LED decoded from THIS outdoor’s card.

The rest of the walkthrough is Diagnose.

On the plates

  • W2 present? 24 VAC at stage-2 coil on a high call.
  • If wiring is good and it never stages, replace the IFC — it is already heating on low.

Plates that use E206