Error code reference

Honeywell Water Heater Error Code 5 Flashes

Sensor failure.

SourceHoneywell Gas Water Heater - Service Manual: FVIR (GPX, GS6, GSX)p. 10

Honeywell codes Honeywell water heater codes

Diagnostic procedure

The full 5 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

Turn gas control valve/thermostat knob to OFF. Turn the main gas supply OFF. Replace the gas control valve/thermostat.

SourceHoneywell Gas Water Heater - Service Manual: FVIR (GPX, GS6, GSX)p. 10

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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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Where this code is documented

1 manual in the MyPros+ library documents this code for Honeywell water heater.

Models covered by the manuals that document this code

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The full 5 Flashes procedure

Where this code is documented

Models covered by the manuals that document this code

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