York, Coleman and Luxaire furnaces with an integrated control board report faults through a diagnostic LED that flashes in colors and counts. On the York TM9V two-stage variable-speed furnace, the blower-related codes are 4 red (main limit open), 11 red (limit open 5 to 15 minutes, usually a failed blower motor or wheel) and 4 amber (thermostat Y without G). Check airflow first, then the motor.
Key Takeaways
- 11 red is the code most likely to point at the blower: the limit stayed open 5 to 15 minutes, and York lists a failed blower motor or wheel as the usual cause.
- 4 red is a main limit trip, which York ties to the filter, duct sizing, blower speed, firing rate and the blower motor.
- A steady LED in any color means control failure, and a steady-off LED means no board power or a blown fuse.
- Soft lockouts reset after one hour. Hard lockouts need power turned off and on.
- The count of codes and their meaning vary by board generation, so use the label inside your blower door.
How York, Coleman and Luxaire Furnaces Show Codes
This guide uses the York TM9V*C installation manual (form 1034868-UIM-A-0513). Its control has a single LED. Green or amber flashing slowly (2 seconds on, 2 seconds off) is normal: green with no thermostat call, amber with a call for heat. Fault codes flash 1/3 second on and off, repeat as many times as the code number, then pause 2 seconds. The same manual documents red codes 1 through 11 and 13 plus amber codes. Red code 12 was not on the pages we could verify, and other York-family boards or newer revisions may use different counts. Coleman and Luxaire furnaces use related designs, but confirm against the chart on your unit.
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Blower Codes First
11 Red Flashes: Limit Open 5 to 15 Minutes
The limit circuit stayed open between 5 and 15 minutes, which York says is usually a failed blower motor or wheel. This is a hard lockout, cleared by turning power to the control off and on. Five-minute check: power off, spin the wheel by hand, and confirm the motor harness is seated. See how to test an ECM blower motor for the full sequence. Yes, the motor is a leading cause.
4 Red Flashes: Main Limit Switch Open
The main limit opened while the blower and inducer run. York lists the filter, duct sizing, blower speed setting, firing rate, limit wiring and the blower motor as checks. If the limit stays open five times in one heat call, the furnace enters a one-hour soft lockout. The motor is a possible cause, but a dirty filter is more common.
5 Red Flashes: Limit Open Over 15 Minutes
This is usually a tripped manual-reset rollout switch and is a hard lockout. The motor is not the cause. Do not bypass the switch; have a technician inspect combustion air, the inducer and the heat exchanger.
4 Amber Flashes: Y Without G
The control receives a Y signal from the thermostat without G, and the furnace still operates. Check the G wire at the thermostat and board.
Ignition, Pressure Switch and Control Codes
| LED | Meaning (York TM9V*C) | Blower Motor the Cause? |
|---|---|---|
| Steady on, any color | Control failure | No |
| Steady off | No board power or blown fuse | No |
| Continuous amber flash | Flame sense current below 1.5 microamps | No |
| 1 red | Flame sensed without a call for heat | No |
| 2 red | Pressure switch closed when it should be open | No |
| 3 red | Pressure switch open when it should be closed | No |
| 6 red | Pressure switch opened four times in a heat call, 1-hour lockout | No |
| 7 red | No flame after three ignition trials, 1-hour lockout | No |
| 8 red | Flame lost five times, 1-hour lockout | No |
| 9 red | Reversed polarity, grounding problem or reversed transformer wires | No |
| 10 red | Gas valve energized with no call for heat | No |
| 13 red | High-fire pressure switch open when it should be closed | No |
Steady On: Control Failure
York says to turn furnace power off and on. If the fault returns, replace the board, which is not field repairable. A steady-off LED calls for a power and fuse check first.
How to Read and Reset Stored Codes
The control stores up to five codes. With no thermostat call active, press the LAST ERROR button to flash the most recent codes first. Holding it for more than 5 seconds clears memory, confirmed by three green flashes. Soft lockouts clear after one hour, and hard lockouts clear when power is cycled. If the cause remains, the code returns.
Which Motor Your York, Coleman or Luxaire Furnace Uses
Match the OEM part number on the motor, not the furnace model. Start with the York replacement blower motors or Coleman replacement blower motors page.
When to Call a Pro
Call a licensed technician for 1 red, 5 red, 9 red, 10 red, any gas valve work and repeat lockouts. The HVAC fault code lookup covers other brands, and Carrier owners can use the Carrier furnace and AC error codes guide.
FAQs
What does 11 red flashes mean on a York furnace?
The limit circuit was open 5 to 15 minutes, usually from a failed blower motor or wheel. It is a hard lockout that clears with a power cycle.
What does a steady LED on a York furnace mean?
A steady LED in any color means control failure. Cycle power, and replace the board if it returns.
How do I see past York fault codes?
Press LAST ERROR with no thermostat call active. The LED flashes stored codes, most recent first.
Do Coleman and Luxaire use the same codes?
They are related designs, but confirm against the label inside your blower door.
Is 4 red always a bad blower?
No. It is a main limit trip, and the filter, ductwork and firing rate are more common causes than the motor.
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