Amana · Furnace / HVAC
Constant flashing Reversed line voltage polarity
What this code means
The control board is detecting that hot and neutral are wired backwards at the incoming power connection.
Most likely causes
- Incorrect wiring during installation or a panel/outlet swap
- Miswired disconnect switch near the furnace
What to try first
This is an electrical wiring issue, not a parts failure — needs a licensed electrician or HVAC tech to correct the polarity.
Safety note: if this code returns after one clean reset, stop resetting it — repeated lockouts usually mean a real fault that needs a licensed technician. Never bypass a safety switch.
FAQ
What does Amana error code Constant flashing mean?
Reversed line voltage polarity. The control board is detecting that hot and neutral are wired backwards at the incoming power connection.
Can I fix Amana code Constant flashing myself?
Usually not. This is an electrical wiring issue, not a parts failure — needs a licensed electrician or HVAC tech to correct the polarity. If the code returns after one reset, it needs a licensed technician.
What causes Amana code Constant flashing?
The most common causes are: incorrect wiring during installation or a panel/outlet swap; miswired disconnect switch near the furnace.
Other Amana furnace codes
All Amana furnace error codes →
Other furnace brands: Trane · Carrier · Lennox · Goodman · American Standard · Rheem · Bryant · Generic · Nest
This information may contain errors or not apply to your exact model — always double-check it against your appliance's own manual before acting. If there's any chance of a gas, fire, electrical, carbon monoxide, or other safety hazard, stop and call a licensed professional or the appropriate agency (e.g. your gas utility) instead of relying on this page alone.