FieldBench
Lennox codes

Lennox

Blower

Lockout

Prodigy blower

Indoor blower alarm / prove.

Walk Blower in Diagnose

Sign in for the next measurement

First check

1 Write the live code and watch one cycle

On Lennox LGH read Prodigy unit controller (Landmark) before you pull power. Write Blower exactly. Watch one full sequence and note which step dies. Belt or ECM. Prodigy blower CFM vs static.

Expect: Call: Occupied / G starts the indoor fan. Y1 is cool. W is gas heat. They are different boards in the same box.

The rest of the walkthrough is Diagnose.

On the plates

  • Belt or ECM. Prodigy blower CFM vs static.

Plates that use Blower