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Start Up Conditions
Water supply systems may, because of such events as
high line pressure, frequent cut-offs, the effects of water
hammer among others, have installed devices such as
pressure reducing valves, check valves, back flow
preventers, etc...to control these types of problems.
When these devices are not equipped with an internal
by-pass, and no other measures are taken, the devices
cause the water system to be closed. As water is
heated, it expands (thermal expansion) and closed
systems do not allow for the expansion of heated water.
The water within the water heater tank expands as it is
heated and increases the pressure of the water system. If
the relieving point of the water heater's temperature-
pressure relief valve is reached, the valve will relieve the
excess pressure. The temperature-pressure relief
valve is not intended for the constant relief of thermal
expansion. This is an unacceptable condition and must
It is recommended that any devices installed which could
create a closed system, have a by-pass and/or the
system have an expansion tank to relieve the pressure
built by thermal expansion in the water system.
Expansion tanks are available for ordering through the
Maytag Customer Service. Contact the local water
supplier and/or call Maytag Customer Service at
1-800-788-8899 for an authorized servicer for assistance
in controlling these situations.
Possible noises due to expansion and contraction of
some metal parts during periods of heat-up and cool-
down do not represent harmful or dangerous conditions.
“AIR” IN HOT WATER FAUCETS
In some water areas, scale or mineral deposits will build
up on your heating elements. This buildup will cause a
rumbling noise. Follow “Element Cleaning/Replacement”
instructions to clean and replace the elements.
HIGH TEMPERATURE SHUT OFF SYSTEM
The water heater has a high limit shut off system with a
reset button located on the thermostat.
Follow the resetting instructions which refer to the high
limit behind the access panel.
NOTE: If your water heater is connected to an “OFF
PEAK” clock, and uses the “3 wire lead” wiring
diagram in the “Wiring Diagram” section, then the
water heater will have a hi-limit on both the upper and
lower thermostats. Follow the instructions to reset the
hi-limit behind the upper and lower access panels.
HYDROGEN GAS: Hydrogen gas can be produced in a hot
water system that has not been used for a long period of
time (generally two weeks or more). Hydrogen gas is
extremely flammable and explosive. To prevent the
possibility of injury under these conditions, we recommend
the hot water faucet be opened for several minutes at the
kitchen sink before any electrical appliances which are
connected to the hot water system are used (such as a
dishwasher or washing machine). If hydrogen gas is
present, there will probably be an unusual sound similar to
air escaping through the pipe as the hot water faucet is
opened. There must be no smoking or open flame near the
faucet at the time it is open.
In each glasslined water heater there is installed at least
one anode rod (see parts section) for corrosion protection of
the tank. Certain water conditions will cause a reaction
between this rod and the water. The most common
complaint associated with the anode rod is one of a “rotten
egg smell”. This odor is derived from hydrogen sulfide gas
dissolved in the water. The smell is the result of four factors
which must all be present for the odor to develop:
a. a concentration of sulfate in the supply water.
b. little or no dissolved oxygen in the water.
c. a sulfate reducing bacteria within the water heater.
(This harmless bacteria is non-toxic to humans.)
d. an excess of active hydrogen in the tank. This is
caused by the corrosion protective action of the anode.
Smelly water may be eliminated or reduced in some water
heater models by replacing the anode(s) with one of less
active material, and then chlorinating the water heater tank
and all hot water lines. Call Maytag Customer Service at
1-800-788-8899 for an authorized servicer for further
information concerning an Anode Replacement Kit
#66001068 and this Chlorination Treatment.
If the smelly water persists after the anode replacement and
chlorination treatment, we can only suggest that continuous
chlorination and filtering conditioning equipment be
considered to eliminate the water problem.
Do not remove the anode leaving the tank unprotected. By
doing so, all warranty on the water heater tank is voided.