American Water Heater 395T1996NOX Water Heater User Manual


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18
Servicing should only be performed by a Qualied Service Technician
TROUBLESHOOTING
COMPLAINT CAUSE
REMEDY
USER QUALIFIED AGENCY
*Water not hot enough. Thermostat set too low. Set thermostat dial to a
higher temperature
Upper and/or lower
temperature probe out of
calibration.
Call qualied agency. Check continuity and resistance
(Ohms) of upper and lower
temperature probes. Replace
probes if out of specication.
*Insufcient hot water.
*See WATER TEMPERATURE
CONTROL WARNING on page
12 of Instruction Manual.
Thermostat set too low. Set thermostat dial to a
higher temperature
Upper and/or lower
temperature probe out of
calibration.
Call qualied agency. Check continuity and resistance
(Ohms) of upper and lower
temperature probes. Replace
probes if out of specication.
Main manual gas shutoff
valve partially closed.
Open main manual gas
shutoff valve to fullest extent.
Heater too small for demand. Space usage to give heater
time to restore water
temperature.
Heater recovery is slower. Call qualied agency. Check gas input. If incorrect, check
for inlet air blockage and/or ue
gas exhaust blockage.
Water temperature too hot. Thermostat set too high. Set thermostat to a lower
setting.
Rumbling. Sediment accumulation on
bottom of tank.
Drain a quantity of water
through drain valve. If
rumbling persists, call
qualied agency.
Delime heater.
Ticking or metallic sounds. Expansion and contraction -
normal.
Pounding or water hammer. Air chambers in piping
have become waterlogged.
Thermal expansion tank
damaged, improperly
charged, or improperly sized.
Drain piping system and
rell. Heater must be off
while this is being done.
Check thermal expansion
tank charge pressure when
the water system pressure
is zero.
Follow the manufacturer's
instructions for proper charging of
the thermal expansion tank.
Water leaks. Drain valve not closed tightly. If drain valve cannot be
closed tightly, replace.
If leakage source cannot be
corrected or identied, call
qualied agency.
Shut off gas supply to heater
and close cold water inlet
valve to heater.
Repair or in case of suspected
tank leakage, be certain to conrm
before replacing heater.
Gas odors. Possible gas leaks. Shut off gas supply to heater
and call gas company at
once.
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