Amana 7 Flashes

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

Diagnostic steps

1. 01

   Sand the flame sensor

   Sand the flame sensor and clean it with steel wool to remove any coating or oxidation reducing the signal.

2. 02

   Inspect sensor alignment

   Inspect the flame sensor for proper alignment and position in the burner flame.

3. 03

   Check gas pressure

   Compare current gas pressure to the rating plate information and adjust as needed to correct a lazy burner flame.

4. 04

   Verify combustion air

   Confirm adequate combustion air and refer to the vent and flue pipe details for proper piping.

5. 05

   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.