11 red flashes Limit open 5-15 minutes - blower failure

What the control is telling you

The limit circuit has stayed open more than 5 minutes (and less than 15), which points to the blower not running. Hard lockout - cycle power after repair.

Applies to: York/JCI residential gas furnaces: York UTEC IFC furnaces, York White-Rodgers IFC furnaces, York TM9V

Likely causes

• Failed blower motor or motor module
• Blower wheel loose or blocked
• Blower wiring / plug problem

Test and repair steps

1. Check that the blower runs on a heat call.
2. Check the motor plugs and 115 V / signal to the motor.
3. Check the blower wheel for debris or a loose set screw.
4. Replace the motor (or ECM module) if it does not run with correct inputs, then cycle power.
5. To read stored codes with no thermostat call active, tap the LAST ERROR button briefly (under 5 s); up to five codes play back newest first. Two green flashes = memory empty. Hold the button 5 s or more to clear (three green flashes confirm).

Settings for these units

Clearance to combustibles · York TM9V

Leave about 24 in. at the front and 18 in. at the side for service.

Approved for alcove and attic installs.

Filter size by return location · York TM9V

Sizes assume high velocity filters (600 FPM); throwaway filters must stay at or below 300 FPM.

Filters go outside the cabinet - never inside the furnace.

Models that show this code

7 models in York UTEC IFC furnaces, York White-Rodgers IFC furnaces, York TM9V

Other codes on the same units

• 7 red flashes Ignition failure lockout (retries)
• 8 red flashes Flame lost repeatedly (recycles)
• 9 red flashes Polarity reversed or bad ground
• 10 red flashes Gas valve powered with no heat call
• 12 red flashes Hot surface igniter open / igniter failure
• 13 red flashes High-fire pressure switch open
• LED steady off Board LED dark - no power to control
• Rapid amber flash Weak flame signal