York TM9E furnace 11 red flashes: Limit Open Too Long
Professional repair
What do 11 red LED flashes mean on a York TM9E furnace? The main limit has stayed open for more than 5 minutes, putting the control in a hard lockout. York says the lockout should be cleared only after the problem is corrected.
Before you touch anything: the six signs that mean stop troubleshooting and call a pro →
Safe checks before calling
Check the external filter and look for closed or blocked supply registers and return grilles. A clean filter and open vents do not clear a hard lockout or rule out a blower fault.
A technician should check the blower motor, blower wheel, wiring, airflow and limit circuit before the lockout is cleared. The limit must not be bypassed.
Possible causes
- Failed blower motor or blower wheel, noted by York TECH
- Restricted airflow from a clogged filter or blocked vents DIY-CHECKABLE
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 11 red LED flashes mean on a York TM9E furnace?
The main limit has stayed open for more than 5 minutes, putting the control in a hard lockout. York says the lockout should be cleared only after the problem is corrected.
How do I fix York TM9E furnace 11 red flashes?
Leave the furnace in lockout rather than cycling power to restart it, and book service. The technician finds and corrects the blower or airflow problem; only then should the hard lockout be cleared.
How much does it cost to fix York TM9E furnace 11 red flashes?
If the blower motor or wheel has failed, expect parts plus fitting labor for a matching component. An airflow restriction elsewhere is mainly diagnosis and correction 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.