Amana · Furnace / HVAC
3 flashes Open pressure switch / blocked hose
What this code means
The pressure switch isn't closing, often from a blocked or disconnected hose rather than the switch itself.
Most likely causes
- Kinked, disconnected, or blocked pressure switch hose
- Blocked vent termination outside
What to try first
Check the small rubber hose running from the pressure switch to the inducer housing for kinks or disconnection.
Good news: this one is often fixable without a service call. If it persists after the steps above, have it looked at.
FAQ
What does Amana error code 3 flashes mean?
Open pressure switch / blocked hose. The pressure switch isn't closing, often from a blocked or disconnected hose rather than the switch itself.
Can I fix Amana code 3 flashes myself?
Often, yes. Check the small rubber hose running from the pressure switch to the inducer housing for kinks or disconnection.
What causes Amana code 3 flashes?
The most common causes are: kinked, disconnected, or blocked pressure switch hose; blocked vent termination outside.
Other Amana furnace codes
All Amana furnace error codes →
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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.