MEDIUM URGENCY

Trane Furnace 9 Flashes — Igniter Problem

9 flashes

Igniter fault — usually a failed hot surface igniter.

Brand: Trane (Also covers American Standard) | Equipment: Gas Furnace

What This Code Means

9 flashes means the control detects an issue with the hot surface igniter. Either it failed to heat up, drew abnormal current, or shows an open circuit.

Likely Causes (Ranked)

Most common

Cracked or burned-out igniter

What: Igniter element is broken or burned through.

How to check: Cut power; visually inspect igniter for cracks.

Fix: Replace igniter.

Shop parts

Common

Igniter wiring issue

What: Loose or broken wire to the igniter.

How to check: Inspect wires at igniter and board.

Fix: Repair connection.

Less common

Bad control board

What: Board can't drive igniter properly.

How to check: Tech diagnostic.

Fix: Replace board.

Shop parts

Diagnostic Steps

Cut power and visually inspect igniter
Check wiring at igniter and board
Replace igniter if cracked
Call tech if both look OK

Frequently Asked Questions

How long does a Trane igniter last?

Typical lifespan is 3-5 years.

Can I replace it myself?

Yes — usually 2 wire connections and 1-2 mounting screws.

Same on American Standard?

Yes.

Related Trane Codes

Related Symptoms

Need More Help?

Try our interactive symptom diagnostic tool or browse Trane parts.

Menu