A.O. Smith 197835-001 Instruction Manual - Troubleshooting Guidelines
40
proBleMs
not enouGh hot water
1.)Blowerwillnotrun.
a.“ON/OFF”controlswitchturnedoff.
Turnswitchtothe“ON”position.
b.Blowerunplugged.
Plugblowerbackinto115VACoutlet.
c.Nopoweratoutlet.
Repairservicetooutlet.
d.Thermostatdefective.
Replacethermostat.
e. Control harness defective.
Replacecontrolharness.
f.Highlimitcontrolcircuitopen.
Reducethewatertemperaturebelow140°F.
Turn the power switch to the off position.
Wait10seconds.Turnthepowerswitchto
theonposition.Reducethetemperatureset
pointtominimizelikelihoodofreoccurrence.If
thisdoesnotsolvetheproblem,replacethe
thermostat.
g.Blowermotordefective.
Replaceblowerassembly.
2.)Thermostatproblems
a.Thermostatsettoolow.
Adjusttemperaturecontrolhigher.
b.ThermostatorECOdefective
Replacethermostat.
3.)Others
a.Heaterundersized..
Reduce hot water use.
b.Lowgaspressure
Contact dealer.
c.Incomingwaterisusuallycold.
Allowmoretimeforheatertoreheat.
d.Leakinghotwaterpipesoffixtures. Haveplumbercheckandrepairleaks.
e.Heaternotlitorthermostatnoton.
Refer to LIGHTING INSTRUCTIONS.
VENT PIPE TOO HOT (ABOVE 170°F [77°C]) Wrongburnerorifice.
Turnoffheaterandgas,cleanburnerhead.
Yellow flaMe
Dirtinburnerports.
Turnoffheaterandgas,cleanburnerhead.
Combustionairpathrestricted.
Check exhaust venting and air openings
in bottom base pan for obstructions or
blockage.
condensatIon
Wateronthefloorunderheater.
See CONDENSATION section.
water leaKs
Improperly sealed, hot or cold supply
connections, relief valve, drain valve or
thermostatthreads.
Checkforleaks.SeeFigure1.
Leakagefromotherappliancesorwaterlines.
Inspectotherappliancesnearwaterheater.
Condensationofflueproducts.
Refer to CONDENSATION section.
leaKInG t & p
Thermalexpansioninclosedwatersystem.
Installthermalexpansiontank(Donotplug
T&Pvalve).
Improperlysealedvalve.
Checkreliefvalveforproperoperation(Do
notplugT&Pvalve).
hot water odors
(refer to cathodic protection)
High sulfate or mineral content in water
supply.
Drainandflushheaterthoroughlythenrefill.
Bacteriainwatersupply.
Chlorinatewatersupply.
hot water too hot
Thermostatsettoohigh.
Refer to TEMPERATURE REGULATION
section.
water heater sounds
Condensationdrippingonburner.
Refer to CONDENSATION above.
SIZZLING - RUMBLING
Sedimentatbottomofheatertank.
Clean sediment from tank. Refer to
DRAINING.
sootInG
Impropercombustion.
RefertoAirRequirements.
Burner wIll not staY lIt-Goes out
4-5 SECONDS
Outletpolarityisreversed.
Testpolarityandcorrect.
Highambientroomtemperature.
Contact a qualified service agency to
determinecause.
Defectivegascontrolvalvethermostat.
Replacegascontrolvalvethermostat.
vent Gas odors
Lackofairsupply.
Shutoffwaterheaterimmediatelyandcontacta
qualifiedserviceagencytodeterminecause.
Improperlyinstalledventpiping.
Downdraft
PoorCombustion
trouBleshootInG GuIdelInes
Theseguidelinesshouldbeutilizedbyaqualifiedserviceagent.