FieldBench
Lennox codes

Lennox

idle

Status

Decimal blink

Idle / heartbeat. Decimal blinks 1 Hz. Not a fault.

Walk idle in Diagnose

2 plates — walk the one on the cabinet

First check

1 Confirm this is not a fault

On the Lennox EL195NE this readout (idle) is run status, not a lockout. Write what the display actually shows and whether W/Y/G is present at the IFC.

Expect: Idle / Ht / CF / stage+CFM words change when you apply and remove the call.

If fail: If the word never changes on a real call, the call is not reaching this IFC.

If pass: The board is alive. Diagnose the comfort complaint, not this code.

The rest of the walkthrough is Diagnose.

On the plates

  • If you expected a code, press E for recall — idle only means nothing is active right now.

Plates that use idle