Arcoaire Furnace Error Codes - Complete Guide

Arcoaire furnaces are part of the ICP family along with Heil, Tempstar, Comfortmaker, Keeprite, and Day & Night. All share the same control board and LED flash codes. Also covers Heil, Tempstar, Comfortmaker, Keeprite, ICP, Day & Night.

All Arcoaire Error Codes

2 flashes

Pressure Switch Did Not Open

Pressure switch did not open between cycles.

3 flashes

Pressure Switch Did Not Close

Pressure switch did not close when inducer started.

4 flashes

Limit Circuit Open

Limit circuit open - overheating. Usually restricted airflow.

5 flashes

Flame Sensed With Gas Valve Off

Flame detected when gas valve should be off - leaky valve.

6 flashes

Weak Flame Signal

Weak or non-existent flame sensor signal.

7 flashes

Limit Circuit Lockout

Limit circuit locked out after repeated trips.

8 flashes

Gas Heating Lockout

Gas heating lockout - will not auto-reset.

10 flashes

Line Voltage Polarity Incorrect

Line voltage polarity incorrect - wiring or transformer fault.

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Arcoaire Furnace Error Codes - Complete Guide

All Arcoaire Error Codes

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