36
Problem
.
Possible Causes
.
.
What To Do
Rumbling noise
Scale.and.sediment.
. Drain.the.water.heater.to.remove.scale.and.sediment.from..
.
.
the.tank ...Refer.to.the.top.of.page.31 ..
Relief valve
.
Pressure.build.up..
. This.is.an.unacceptable.condition.and.must.be
producing popping
.
caused.by.thermal..
. corrected ..Contact.the.water.supplier.or.plumbing.
noise or draining
.
expansion.to.a..
. contractor.on.how.to.correct.this ..Do.not.plug.the
closed.system ..
. relief.valve.outlet ..
Not enough or
.
Water.usage.may.have...
. Wait.for.the.water.heater.to.recover.after.an
no hot water
exceeded.the.capacity.
. abnormal.demand .
of.the.water.heater .
Low.gas.pressure ..
. Check.gas.supply.pressure.and.manifold.pressure .
.
The.gas.control.(thermostat)..
. See.the.“Water.Temperature.Setting”.of.The.Water...
.
may.be.set.too.low ..
. Heater.section.of.this.manual .
.
Leaking.or.open.hot..
. Make.sure.all.faucets.are.closed .
.
water.faucets .
.
Check.valve.error.codes ..
. Refer.to.gas.valve.error.code.table.on.page.37 .
.
“ON/OFF”.switch.turned.off ..
. Turn.“ON” .
.
Blower.unplugged ..
. Plug.in ..Verify.power.supply.(120VAC) .
.
Combustion.Shutoff.System..
. .Contact.a.qualified.service.technician .
.
tripped..
.
Water is too hot
The.gas.control.(thermostat)..
●
.See.the.“Water.Temperature.Setting”.of.The.Water...
.
is.set.too.high ..
. Heater.section.of.this.manual .
Gas.Control.(Thermostat).
●
.Contact.a.qualified.service.technician.to.replace.the..
.
Defective ..
. gas.control.(thermostat) .
Before You Call For Service…
Troubleshooting Tips
Save time and money! Review the charts on the following pages first and you may not need to call for service.
This.water.heater.incorporates.a.combustion.shut.off.device.that.shuts.the.operation.of.the.water.heater.down.
if.undesirable.combustion.conditions.occur,.such.as.the.presence.of.flammable.vapors.or.blockage.of.the.
combustion.air.inlet.openings ...Please.contact.a.qualified.Service.Technician.if.this.occurs .
CAUTION: For your safety DO NOT attempt repair of gas piping, gas control (thermostat), burners, vent connectors or
other safety devices. Refer repairs to qualified service personnel.
CAUTION: Make certain power to water heater is “OFF” before removing protective cover FOR ANY REASON.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and
dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING.