FieldBench
Bryant codes

Bryant

34

Lockout

Ignition prove fail

Trial without flame sense. Repeats → 14.

Walk 34 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 Bryant 912S 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. HSI glow and 120 VAC, gas cock, manifold, flame rod oxide, IFC ground.

Expect: Flame sense: µA per Comfort 96 door card (typically ≥ 0.5–1.0 µA class).

The rest of the walkthrough is Diagnose.

On the plates

  • HSI glow and 120 VAC, gas cock, manifold, flame rod oxide, IFC ground.

Plates that use 34

Same number, other makers

34 on Bryant is not the same code on these plates.