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Error code reference
Amana Furnace Error Code 2 Flashes
Pressure switch stuck closed - pressure switch circuit is closed even though the induced draft blower is not operating.
SourceAmana 40" 80%/90% Gas Furnaces - Service Manual (GUIA/GCIA/GUIB/GCIB Series)p. 77, 80, 92, 101, 107, 113
Diagnostic procedure
The full 2 Flashes procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check for shorted wiring or replace pressure switch.
SourceAmana 40" 80%/90% Gas Furnaces - Service Manual (GUIA/GCIA/GUIB/GCIB Series)p. 77, 80, 92, 101, 107, 113
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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