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Before#You#Call#For#Service…
Troubleshooting#Tips#
Save#time#and#money!#Review#the#chart#on# this#page#first#and#you#may#not#need# to#call#for#
service.

Problem Possible#Causes What#to#Do

Rumbling#noise#
upon#start_up
Normal(settling(of(internal(compoY
nents.
z No(action(required.
Relief#valve##
producing#popping#
noise#or#draining
Pressure(build(up(caused(by(thermal(
expansion(in(a(closed(system.
zThis(is(an(unacceptable(condition(and(
must(be(corrected.(Contact(the(water(
supplier(or(plumbing(contractor(on(how(
to(correct(this.((Do(not(plug(the(relief(
valve(outlet.