Trane Error Code 9: Igniter Problem

Severity
Warning
Type
led blink count
Where to look
sight glass
Estimated repair cost: $100 — $250 (parts + labor)
Warning: Your Trane HVAC system has encountered an igniter issue and has shut down to prevent damage.

How to Fix Trane Code 9

  1. Step 1: Turn off your HVAC system at the thermostat and the main power switch.
  2. Step 2: Check your air filter and replace it if it's dirty. A clean filter can help prevent future issues.
  3. Step 3: Call a professional HVAC technician. This is a safety and comfort issue that requires expert attention.

How to Reset Trane Code 9

  1. Turn off the furnace power switch, usually located on or near the unit.
  2. Turn off the circuit breaker for the furnace. Wait 30 seconds.
  3. Restore power at the breaker and flip the furnace switch back on.
  4. Set the thermostat to call for heat. If the error code returns after 2-3 ignition attempts, the fault requires repair.

What does 9 mean?

The Trane 9 error code indicates a problem with your system's igniter. The igniter is responsible for heating the air as it passes through your furnace. When this component fails, your system will display the 9 error code and shut down to prevent further issues. This is a yellow hazard level because while it's not an immediate safety risk like a gas leak, it does require professional attention to resolve.

Affected Models

Recall Notices

Trane/American Standard Gas-Electric Packaged Units Recalled Due to Fire Hazard 25-XXX

Fuel gas valve can open unexpectedly, creating gas leak and fire hazard. Stop using heating mode.

View official notice

Replacement Parts

PartOEM NumberEst. Cost
Igniter Trane 400296 —
Igniter control board Trane 400297 —

Related Codes on Same Models

CodeDescriptionSeverity
STEADY-ON Control Board Problem Warning
STEADY-OFF No Power Warning
SLOW-FLASH Normal Operation (Standby) Warning
FAST-FLASH Active Call for Heat Warning
2 System Lockout Warning
3 Pressure Switch Error Warning
4 Open Limit Switch Warning
5 Flame Sensed With Gas Off Warning
6 Polarity/Grounding Error Warning
7 Gas Valve Circuit Error Warning