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Diagnostic Code Chart
DIAGNOSTIC LIGHT INDICATES CORRECTIVE ACTION*
LIGHTON Normaloperation None
NOLIGHT Nopowertocontrolboardor diagnostic 1. Checkfor blownfusesortrippedbreaker
lightburnedout 2. Checkpowerleadsoncontrolboardwith meterfor 240volts
3. If powerisokay,replacecontrolboard
1FLASH Poweronwith nowaterin tank 1. Addwaterandresettemperaturecontrolsystem.See"Reset
Function"onpage10
2FLASHES Watertemperatureexceededhighlimit 1. Makesureupperandloweraccessdoorsandinsulationare
properlyin place
2. Checkelementcircuitsfor resistanceof5- 25ohms
3. Replaceelementifnecessaryandresetcontrolsystem
3FLASHES Sensorfailure 1. Removepower
2. Checktemperaturesensorfor openor shortedcircuit
3. Ifnoproblemisfound,replacesensors
4 FLASHES Upperelementcircuitfailure 1. Removepower
2. Checkelementcircuitfor resistanceof5- 25ohms
3. Checkwiresatelementandboardfor damage
4. Ifthis4flashesconditioncontinues,replacecontrolboard
5FLASHES Lowerelementcircuitfailure 1. Removepower
2. Checkelementcircuitfor resistanceof5- 25ohms
3. Checkwiresatelementandboardfor damage
4. Ifthis5flashesconditioncontinues,replacecontrolboard
*These instructions are brief and intended as guidance for a qualified service technician. If you lack the necessary
skills to perform these procedures call 1-877-817-6750 for assistance.
14
Troubleshooting Chart
PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION
NO HOTWATER 1. Nopowerto heater 1. Referto"No Light"of DiagnosticCodeChart
2. Hightemperaturelimitshut-down 2. Referto"2 Flashes"of DiagnosticCodeChart
3. Defectivesensor 3. Referto"3 Flashes"of DiagnosticCodeChart
INSUFFICIENTHOTWATER
HIGHOPERATIONCOSTS
1. Defectivelowerelement
2. Temperaturesettoolow
3. Sedimentor limein tank
4. DefectiveDipTube
5. Heatertoosmallfor job
6. Wrongpipingconnections
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
1.
2.
3.
4.
5.
7. Leakingfaucets
8. Wastedhotwater
9. Longrunsof exposedpipe
10.Hotwaterpipingonoutsidewall
1. Temperaturesettoohigh
2. Sedimentor limein tank
3. Heatertoosmallforjob
4. Leakingfaucets
5. Wastedhotwater
6. Longrunsof exposedpiping 6.
7. Hotwaterpipingin exposedwall 7.
1. Upperelementdefective 1.
2. Leakingfaucets 2.
1. Excessivewaterpressure 1.
2. Closedsystem 2.
3. DefectiveT & P valve 3.
1. Sulfidesinthe water 1.
Referto"5 Flashes"of DiagnosticCodeChart
Settemperaturetodesiredsetting
Drain.Determineifwatertreatmentis needed
ReplaceDipTube
CheckandInstalladequatewaterheater
Correctpiping
Repairfaucets
Advisecustomer
Insulatepiping
Insulatepiping
Lowertemperaturecontrolor changeto EnergySaverMode
Drain.Flush-Providewatertreatmentif needed
Installadequateheater
Repairfaucets
Advisecustomer
Insulatepiping
Insulatepiping
SLOWHOTWATERRECOVERY Referto"4 Flashes"of DiagnosticCodeChart
Repairfaucets
DRIPFROMT&P VALVE Usepressurereducingvalveandpressurereliefvalve(Seepage
6)
Seepage6,"ClosedSystem/ThermalExpansion"
ReplaceT &Pvalve
WATERODOR Seepage11,"WaterOdor"
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