ICP
34
LockoutIgnition prove fail
Trial without flame sense. Repeats → 14.
Walk 34 in Diagnose
3 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 ICP N80ESN 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, IFC ground.
Expect: Typically ≥ 1.0 µA DC on this family — confirm the door card. Rising while running.
The rest of the walkthrough is Diagnose.
On the plates
- HSI glow and 120 VAC, gas cock, manifold, flame rod, IFC ground.
- If 31 is also stored, fix draft first or you will never get a fair 34.
Plates that use 34
Same number, other makers
34 on ICP is not the same code on these plates.