Amana 9 Flashes Error Code
Twinning fault — twinned furnaces are not wired or relayed together correctly.
Source: Amana/Amana_2021F_InstallationGuide_HVAC_EN.pdf
What does Amana 9 Flashes mean?
Nine red flashes indicate a twinning fault, where the circulating blowers of twinned furnaces are not operating simultaneously and no blower operation occurs. The control detects that the furnace twin terminals are not connected together by field wiring, or that an isolating relay is missing or improperly installed in a twinned installation.
Symptoms
- Circulating blowers not operating simultaneously
- No blower operation
- Integrated control module diagnostic LED flashes nine red flashes
- Twinned furnaces fail to coordinate
Common causes
- Furnace twin terminals not connected together by field wiring
- Isolating relay not used
- Isolating relay improperly installed
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Diagnostic steps
Connect the twin terminals
Install field wiring connecting the twin terminals and check the continuity of that wiring.
Verify each fan motor
Verify each furnace fan motor is operable on its own without the twinning connection.
Wire per the twinning diagram
Wire the installation per the twinning diagram in the installation manual, including the isolating relay.
Power off before servicing
Verify the line voltage supply is turned off before proceeding with corrections.
When to call a professional
Twinning two furnaces correctly requires following the manufacturer's twinning diagram and confirming each blower and the isolating relay are wired properly. If you did not perform the original twinned installation or are unsure how to verify the twin terminal wiring and isolating relay, have a qualified installer complete it. Always verify the line voltage supply is off before making wiring corrections.
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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.
Flame sense microamp signal is low — a coated, oxidized, or misaligned flame sensor.
Igniter relay fault — wiring, igniter, grounding, or control module problem.
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.