Amana 1 Flash Error Code
System lockout from too many failed ignition retries — the furnace could not establish or hold flame.
Source: Amana/Amana_2021F_InstallationGuide_HVAC_EN.pdf
What does Amana 1 Flash mean?
One red flash on the integrated control module means the furnace went into lockout after an excessive number of ignition retries. The control tried to light the burners but never sensed a stable flame, or it lost flame after establishing it. The board automatically attempts to reset from lockout after one hour.
Symptoms
- Furnace fails to operate and produces no heat
- Integrated control module diagnostic LED flashes one red flash
- Burners may fail to light or the flame drops out shortly after ignition
- Furnace locks out and may auto-retry after one hour
Common causes
- Failure to establish flame from no gas to the burners or a front cover pressure switch stuck open
- Bad igniter, igniter misalignment, or improper orifices
- Coated, oxidized, or improperly connected flame sensor
- Loss of flame after establishment from interrupted gas supply or lazy burner flames
- Improper gas pressure or restriction in the flue and combustion air piping
- Front cover pressure switch opening or poor induced draft blower performance
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Diagnostic steps
Locate and correct any gas interruption
Confirm gas is reaching the burners and that the supply was not interrupted. Restore proper gas flow if it was lost.
Check the front cover pressure switch
Verify pressure switch operation including its hose, wiring, and contact operation, and correct anything that is faulty.
Inspect or replace the igniter
Replace or realign the igniter if it is bad or misaligned. The igniter is fragile, so handle it with care.
Service the flame sensor
Check the flame sense signal and sand the sensor with emery cloth if it is coated or oxidized.
Check the flue and combustion air piping
Inspect piping for blockage and verify proper length, elbows, and termination, then confirm the induced draft blower performs correctly.
When to call a professional
Diagnosing a one-flash ignition lockout means working around live gas, high voltage, and a hot surface igniter that can fail from rough handling. If you cannot safely confirm gas supply, test the flame sense signal, or verify pressure switch and igniter operation, call a qualified servicer. Turn power off prior to repair, and never bypass the control's lockout protection.
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Other Amana Error Codes
Pressure switch circuit is closed when it should be open — the induced draft blower is not operating.
Pressure switch circuit is not closing while the induced draft blower runs — restricted airflow or a faulty switch.
Primary or auxiliary limit circuit is open — the furnace is overheating from insufficient airflow.
Flame sensed with no call for heat — a short to ground in the flame sense circuit.
Rollout limit open or the integrated control module fuse is blown — possible flame rollout.
Flame sense microamp signal is low — a coated, oxidized, or misaligned flame sensor.
Igniter relay fault — wiring, igniter, grounding, or control module problem.
Twinning fault — twinned furnaces are not wired or relayed together correctly.
Open fuse / no 24V power to the integrated control module — often from a voltage surge.
Igniter open — broken igniter, bad wiring, or poor grounding.
Inducer relay fault — inducer wiring, blockage, grounding, or control module problem.
Reversed polarity of 115V or 24V power to the furnace or control module.