York TM9E furnace 7 red flashes: Ignition Failure
Professional repair
What do 7 red LED flashes mean on a York TM9E furnace? The furnace made three ignition trials without establishing flame. The control then locks out for one hour and retries automatically.
This condition involves the gas or combustion side. If you smell gas or a CO alarm sounds: leave, then call your gas utility. Diagnostic info here is reference — combustion repairs are for licensed technicians. All six emergency signs →
A technician checks gas pressure, the gas valve, ignitor, flame sensor, burners and wiring. None of these are homeowner tasks, including sensor cleaning or gas adjustments.
Possible causes
- Low or no gas pressure, or a gas valve problem TECH
- Ignitor or flame sensor fault, both listed by York TECH
- Wiring or burner problem found during technician diagnosis TECH
Parts for this code
No model-verified part number is listed here. Have the fault diagnosed and the correct part matched to your furnace before ordering.
Questions about this code
What do 7 red LED flashes mean on a York TM9E furnace?
The furnace made three ignition trials without establishing flame. The control then locks out for one hour and retries automatically.
How do I fix York TM9E furnace 7 red flashes?
Arrange service and let the technician work through the gas supply and ignition components. A successful retry after the 1-hour lockout does not show the problem is fixed, so avoid forcing restarts in the meantime.
How much does it cost to fix York TM9E furnace 7 red flashes?
Charges reflect diagnosis across several possible causes. A gas-supply issue, ignitor, sensor or valve each involves different parts and fitting time.
Applies to
TM9E
Different York generations use different code maps. If your series isn't listed, don't assume this meaning — check your blower-door label.
Verified against YORK TM9E Series Installation Manual — Single Stage ECM Residential Gas Furnaces, p.34
Last verified 2026-10-07 · page updated 2026-10-07 · how we verify
Related York furnace codes
These codes use the same york tm9e single-stage ecm tri-color led control system.