Amana AMSS920803BN Error Code 1 Flash: System Lockout
What Does Code 1 Flash Mean?
Code 1 (1 Flash) on the Amana AMSS920803BN indicates a system lockout. The furnace attempted to ignite three times and failed each time, triggering a safety lockout that prevents further ignition attempts for one hour.
During a normal heating cycle, the inducer motor starts, the hot surface igniter heats up, the gas valve opens, and the flame sensor confirms that a flame is present. If the flame sensor cannot detect a flame within the allotted time, or if the flame is lost after being established, the control module counts it as a failed attempt. After three consecutive failures, the system locks out.
The most common cause by far is a dirty or oxidized flame sensor. Over time, carbon and oxide buildup on the sensor rod reduces its ability to detect the flame's electrical signal. Other possible causes include a failed or misaligned igniter, no gas supply reaching the burners, or interrupted gas supply causing flame loss after ignition.
Common Causes
When to Call a Professional
Contact a licensed HVAC technician if:
- Code 1 returns after cleaning the flame sensor
- The igniter does not glow red-hot during the ignition sequence
- You smell gas but the burners do not light
- The flame lights briefly then goes out repeatedly
- The flame sensor rod appears cracked or damaged
✓ Verified against manufacturer service manual — March 2026