FieldBench
Rheem codes

Rheem

Ignition

Lockout

Ignition lockout

Trial for ignition failed after the IGC retries.

Walk Ignition in Diagnose

Sign in for the next measurement

First check

1 Watch one full try — do not reset

Write the Rheem RKNL 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 click → 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 click → flame. The dead step is the repair.
  • HSI ohms cold vs the sticker in this heat section. 24 VAC at the valve during trial.
  • Inlet gas on the roof. Long gas pipes and a undersized regulator starve a 250 kBtu section.

Plates that use Ignition

Same number, other makers

Ignition on Rheem is not the same code on these plates.