Kenmore HydroSense 153.33443, Owner'S Manual

24

Condensation

Whenever the water heater is fi lled with cold water, some 
condensate will form while the burner is on. A water heater may 
appear to be leaking when in fact the water is condensation. This 
usually happens when: 

•  A new water heater is fi lled with cold water for the fi rst time.

•  Burning gas produces water vapor In water heaters, 

particularly high effi ciency models where fl ue temperatures 
are lower.

•  Large amounts of hot water are used in a short time and the 

refi ll water in the tank is very cold.

Moisture from the products of combustion condense on the cooler 
tank surfaces and form drops of water which may fall onto the 
burner or other hot surfaces to produce a “sizzling” or
“frying” noise.

Excessive condensation can cause pilot outage due to water 
running down the fl ue tube onto the main burner and putting 
out the pilot.

Because of the suddenness and amount of water, condensation 
water may be diagnosed as a “tank leak”. After the water in 
the tank warms up (about 1-2 hours), the condition should 
disappear.

Do not assume the water heater is leaking until there has been 
enough time for the water in the tank to warm up. 

An undersized water heater will cause more condensation. 
The water heater must be sized properly to meet the family’s 
demands for hot water including dishwashers, washing machines 
and shower heads.

Excessive condensation may be noticed during the winter and 
early spring months when incoming water temperatures are at 
their lowest.

Good venting is essential for a gas fi red water heater to operate 
properly as well as to carry away products of combustion and 
water vapor. 

Smoke / Odor

It is not uncommon to experience a small amount of smoke and 
odor during the initial start-up. This is due to burning off of oil 
from metal parts, and will disappear in a short while.

Operational Conditions                                   

Smelly Odor

I

n each 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 sulfi de gas dissolved in the water. The smell is

the result of four factors which must all be present for the odor
to develop:

•  a concentration of sulfate in the supply water.

•  little or no dissolved oxygen in the water.

•  a sulfate reducing bacteria within the water heater. (This 

harmless bacteria is non-toxic to humans.)

•  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. Contact Sears Service for further information concerning 
an Anode Replacement Kit #9001453 and this Chlorination 
Treatment. Anode replacement  and chlorination of the tank are 
not covered by the water heater’s limited warranty.

If the smelly water persists after the anode replacement and 
chlorination treatment, it may be necessary to chlorinate or aerate 
your water supply to eliminate the problem.

Do not remove the anode leaving the tank unprotected. By 
doing so, all warranty on the water heater tank is voided.

“AIR” In Hot Water Faucets

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 
fl ammable and explosive. To prevent the possibility of injury 
under these conditions, we recommend the hot water faucet, 
located farthest away, be opened for several minutes 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 fl ame near 
the faucet at the time it is open.

High Temperature Shut Off System

This water heater is equipped with an automatic gas shutoff 
system.  This system works when high water temperatures 
are present.  Turn “OFF” the entire gas supply to the water 
heater. The high temperature shutoff is built into the gas 
control valve. It is non-resettable. If the high temperature 
shutoff activates, the gas control valve must be replaced.  
Contact your gas supplier.