Amana 7 Flashes Error Code
Flame sense microamp signal is low — a coated, oxidized, or misaligned flame sensor.
Source: Amana/Amana_2021F_InstallationGuide_HVAC_EN.pdf
What does Amana 7 Flashes mean?
Seven red flashes indicate the flame sense microamp signal is low while the furnace is in normal operation. The control still runs, but it warns that the flame sensor is reading a weak signal. This is usually caused by a coated or oxidized sensor, a sensor positioned incorrectly in the burner flame, or a lazy burner flame from improper gas pressure or combustion air.
Symptoms
- Normal furnace operation continues
- Integrated control module diagnostic LED flashes seven red flashes
- Flame sense signal reads low
- Burner flame may appear lazy or weak
Common causes
- Flame sensor coated or oxidized
- Flame sensor incorrectly positioned in the burner flame
- Lazy burner flame from improper gas pressure or combustion air
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Diagnostic steps
Sand the flame sensor
Sand the flame sensor and clean it with steel wool to remove any coating or oxidation reducing the signal.
Inspect sensor alignment
Inspect the flame sensor for proper alignment and position in the burner flame.
Check gas pressure
Compare current gas pressure to the rating plate information and adjust as needed to correct a lazy burner flame.
Verify combustion air
Confirm adequate combustion air and refer to the vent and flue pipe details for proper piping.
Power off before servicing
Turn power off prior to repair before handling the flame sensor.
When to call a professional
A persistently low flame sense signal can progress to ignition lockouts and may indicate gas pressure or combustion air problems that need instruments to diagnose. If cleaning and realigning the sensor does not clear the seven-flash code, or if you cannot safely measure and adjust gas pressure against the rating plate, call a qualified servicer. Work only with power off prior to repair.
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Other Amana Error Codes
System lockout from too many failed ignition retries — the furnace could not establish or hold flame.
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.
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.