FieldBench
York codes

York

6-flash

Lockout

IGC 6-flash — example

Example on many CES rooftop IGCs: ignition lockout after retries. Confirm THIS sticker.

Walk 6-flash in Diagnose

Sign in for the next measurement

First check

1 Watch one full try — do not reset

Write the York ZF code. Watch inducer, HSI glow, valve click, flame, µA. The step that dies is the repair. Resetting only burns another try into a harder lockout. Watch one try: inducer → PS → glow → valve → flame. The dead step is the repair.

Expect: Call → Fan → Econo → Cool → Heat

The rest of the walkthrough is Diagnose.

On the plates

  • Watch one try: inducer → PS → glow → valve → flame. The dead step is the repair.
  • HSI ohms, 24 VAC at the valve during trial, inlet gas on the roof.

Plates that use 6-flash

Same number, other makers

6-flash on York is not the same code on these plates.