York TM9E furnace 8 red flashes: Repeated Flame Loss
Professional repair
What do 8 red LED flashes mean on a York TM9E furnace? Flame was lost five times during heating, which corresponds to four recycles. The control locks out for one hour, then 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 →
Flame sensor, gas pressure and gas valve checks belong to a technician. Cleaning or removing the flame sensor is professional service, not a homeowner step.
Possible causes
- Flame sensor, gas pressure or gas valve condition 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 8 red LED flashes mean on a York TM9E furnace?
Flame was lost five times during heating, which corresponds to four recycles. The control locks out for one hour, then retries automatically.
How do I fix York TM9E furnace 8 red flashes?
Book a service call and mention whether the furnace started heating and then shut off repeatedly. Do not rely on automatic retries; the technician should measure flame proving and gas pressure to find why the flame is not holding.
How much does it cost to fix York TM9E furnace 8 red flashes?
Expect diagnostic time for flame proving and gas pressure. Sensor service, a pressure correction or a valve replacement differ in parts and labor, so cost follows the finding.
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.