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Error code reference
Amana Furnace Error Code 6 Flashes
Reversed polarity
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What the 6 Flashes error code actually means
Your Amana furnace has detected that its electrical wiring is connected backwards, meaning the hot and neutral wires have been swapped somewhere in the system. This is a wiring problem, not a mechanical failure, but it needs to be corrected before the furnace will operate safely. A qualified technician should inspect the wiring connections to find and fix the reversed leads.
Diagnostic procedure
The full 6 Flashes procedure
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1
First diagnostic step
Review wiring diagram; verify proper grounding; check and correct wiring.
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of 6 Flashes
Ranked by how often they cause this code
- 1Reversed 115V line voltage wiring at junction box
- 2Reversed 24V transformer secondary leads
- 3Improper or missing furnace ground
- 4Previous wiring repair performed incorrectly
- 5Faulty or failed control board
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Questions people ask about 6 Flashes
What does 6 Flashes mean on a Amana furnace?
The 6 Flashes code on an Amana furnace indicates reversed polarity in either the 115V AC supply wiring or the 24V AC control circuit wiring. This fault applies only to units with 50A55, HSI-2, 50M61, or 50V61 control boards. The furnace will lock out and not operate until the polarity issue is corrected. Resolving it requires inspecting and correcting the wiring according to the furnace wiring diagram.
Is a 6 Flashes polarity error on an Amana furnace dangerous?
Yes, reversed polarity is a serious electrical condition that should be corrected promptly. Reversed line voltage polarity can create shock hazards and may damage the control board or other components over time. The furnace is designed to lock out under this condition specifically to prevent unsafe operation. Do not attempt to bypass the fault or operate the furnace until the wiring has been properly corrected.
How much does it cost to fix a reversed polarity fault on an Amana furnace?
If the fix is simply correcting a reversed wire connection, the cost is primarily the technician's diagnostic and labor time, typically in the range of $75 to $200 depending on local rates. If the control board was damaged by the polarity reversal and needs replacement, parts and labor costs can range from $250 to $600 or more. Getting a diagnosis first will clarify exactly what work is needed.
How do I fix a 6 Flashes error on my Amana furnace?
Start by turning off power to the furnace and locating the wiring diagram on the unit cabinet. Check that the 115V hot and neutral conductors are connected to the correct terminals at the junction box, and verify that the 24V transformer secondary leads are not swapped at the control board. Also confirm the furnace is properly grounded. If you are not comfortable working with electrical wiring, contact a licensed HVAC technician.
Will resetting my Amana furnace clear the 6 Flashes error?
Resetting the furnace by cycling the power will temporarily clear the fault display, but the error will return immediately if the underlying wiring problem has not been corrected. The control board checks polarity each time the unit powers up. A lasting fix requires identifying and correcting the reversed wiring connection before the furnace will operate normally.
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