Error code reference

Honeywell Water Heater Error Code 8 Flashes

Power off failure.

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

Honeywell codes Honeywell water heater codes

Diagnostic procedure

The full 8 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

If the pilot flame is present when the control knob is set to the OFF position, replace the gas control valve/thermostat. If the pilot flame is not present, wait 10 minutes for the thermopile to cool, then relight the unit.

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

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 8 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 Honeywell water heater.

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 8 Flashes procedure

Where this code is documented

Models covered by the manuals that document this code

Related Honeywell water heater error codes