Amana 12 Flashes Error Code
Inducer relay fault — inducer wiring, blockage, grounding, or control module problem.
Source: Amana/Amana_2021F_InstallationGuide_HVAC_EN.pdf
What does Amana 12 Flashes mean?
Twelve red flashes indicate an inducer relay fault, and the furnace is not operating. The control cannot drive the induced draft blower correctly. Causes include improperly connected inducer wiring, improper grounding, a bad inducer, a blockage in the inducer or vent, or a faulty integrated control module.
Symptoms
- Furnace not operating
- Integrated control module diagnostic LED flashes twelve red flashes
- Induced draft blower does not run correctly
- Ignition sequence does not begin
Common causes
- Inducer relay fault on the integrated control module
- Improperly connected inducer wiring or improper grounding
- Bad inducer or blockage in the inducer and vent
- Poor unit ground
- Faulty integrated control module
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Diagnostic steps
Check the inducer wiring
Check and correct the wiring from the integrated control module to the inducer.
Check for blockage
Check for blockage in the inducer and in the vent, and replace the inducer if it is bad.
Correct the ground
Check and correct the unit ground wire to resolve improper grounding.
Replace the control module
Replace the integrated control module if it is bad after the wiring, inducer, and ground are verified.
Power off before servicing
Turn power off prior to repair and read the electrostatic discharge precautions before handling the control module.
When to call a professional
An inducer relay fault can stem from the blower, the wiring, vent blockage, or the control board, and isolating the cause requires electrical testing. If correcting the wiring, grounding, and any blockage does not clear the twelve-flash code, have a qualified servicer confirm whether the inducer or control module needs replacement. Turn power off prior to repair and follow electrostatic discharge precautions when handling the board.
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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.
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.
Reversed polarity of 115V or 24V power to the furnace or control module.