Janitrol Furnace Error Codes - Complete Guide

Janitrol was Goodman's early furnace brand (pre-2002 acquisition by Goodman). Janitrol furnaces still in service use Goodman-family control boards and share the same LED flash codes as Goodman, Amana, and Daikin. Also covers Goodman, Amana, Daikin.

All Janitrol Error Codes

1 flash with extended pause

Goodman 1 Flash — Lockout Due to Excessive Retries

Locked out after exhausting ignition retry attempts.

2 flashes

Goodman 2 Flashes — Pressure Switch Stuck Closed

Pressure switch stuck closed when inducer is off.

3 flashes

Goodman 3 Flashes — Open Pressure Switch With Inducer On

Pressure switch open during inducer operation — vent or inducer issue.

4 flashes

Goodman 4 Flashes — High Limit Switch Open

High limit switch open — overheating. Usually a dirty filter.

5 flashes

Goodman 5 Flashes — Flame Sensed With Gas Valve Off

Flame detected when gas valve closed — leaky valve.

6 flashes

Goodman 6 Flashes — Roll Out Switch Open (SAFETY)

Flame rollout switch tripped — get a CO safety inspection before reset.

7 flashes

Goodman 7 Flashes — Low Flame Signal

Weak flame sensor signal — usually a dirty sensor.

8 flashes

Goodman 8 Flashes — Igniter Error

Igniter fault — failed or cracked hot surface igniter.

9 flashes

Goodman 9 Flashes — Grounding or Polarity Reversed

Grounding or polarity reversed — wiring issue.

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Janitrol Furnace Error Codes - Complete Guide

All Janitrol Error Codes

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