Goodman GMEC960803BN Error Code Red 11 Flashes: Limit Switch Open - Blower Failure

What Does Code Red 11 Flashes Mean?

Eleven red flashes on the Goodman GMEC960803BN's Integrated Control Module mean the limit switch circuit stayed open for more than five minutes while the inducer was running. A limit that will not close back within that time usually means heat is not being carried away — most often because the indoor blower is not running or not moving enough air.

When the burners fire but the multi-speed ECM blower does not deliver airflow, heat builds around the heat exchanger and the limit opens to protect the furnace. If the blower never comes on to cool things down, the limit stays open and the board reports a blower failure. Causes include a failed blower motor or module, a bad capacitor or wiring, or a limit switch stuck open from repeated overheating.

This is the most blower-specific of the overheat family. Red 4 flashes is a general open limit (often airflow/filter related) and red 5 flashes is the rollout/fuse escalation. Red 11 specifically ties an extended open limit to blower operation. The manual's guidance is to reset main power and check indoor blower operation. It is a high-severity fault, and blower motor diagnosis is professional work.

What You'll Notice

• The furnace overheats and shuts down, and the board flashes red eleven times
• The indoor blower does not start, or starts and then stops, while the furnace is calling for heat
• Little or no airflow from the registers even though the furnace tried to fire
• The inducer may run while the main blower stays silent
• The furnace stays locked out until power is reset and the blower issue is fixed

Common Causes

How This Is Diagnosed

Because the limit stayed open with no cooling airflow, diagnosis targets the blower. After resetting main power, a technician checks whether the indoor blower motor runs on a call, and if not, tests the motor, its module or capacitor, and the wiring and control signals driving it. The limit switch is also checked for a stuck-open condition caused by prior overheating. Blower motor and limit-switch work are professional repairs.

When to Call a Professional

This code involves components that are not homeowner-serviceable, so have a licensed HVAC technician diagnose and repair it. Keep in mind:

• The indoor blower does not run when the furnace calls for heat
• The blower starts then stops, or runs only intermittently
• The code returns after resetting main power
• Any diagnosis of the blower motor, its module, capacitor, or the limit switch

✓ Verified against manufacturer service manual — March 2026