Error code reference

Amana Furnace Error Code 4 Flashes

Open limit control or thermal protection device - primary limit, auxiliary limit, or rollout limit circuit is open.

SourceAmana 40" 80%/90% Gas Furnaces - Service Manual (GUIA/GCIA/GUIB/GCIB Series)p. 77, 80, 92, 101, 107, 113

Diagnostic procedure

The full 4 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

First diagnostic step

Check filters and ductwork for blockage; check for proper circulator blower speed and performance; check burner alignment.

SourceAmana 40" 80%/90% Gas Furnaces - Service Manual (GUIA/GCIA/GUIB/GCIB Series)p. 77, 80, 92, 101, 107, 113

Unlock with pass

More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

Unlock 4 Flashes procedure $9.95

Or subscribe: $29/month for all codes plus Max diagnostics, with 70 Max messages a day. Plus applicable tax.

Where this code is documented

1 manual in the MyPros+ library documents this code for Amana furnace.

Models covered by the manuals that document this code

75,000+ service documents · 20,000+ error codes · 100+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax

The full 4 Flashes procedure

Where this code is documented

Models covered by the manuals that document this code

Related Amana furnace error codes