34
complaint cause
remedy
user serVice agent
*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 service agent 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
11).
Thermostat set too low. Set thermostat dial to a higher
temperature
upper and/or lower temperature
probe out of calibration.
Call service agent 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 service agent Check gas input. if incorrect, adjust gas
pressure or replace burner orices.
Gas pressure switch doesn't close. Call service agent Temporarily bypass the gas pressure
switch connections and measure
gas supply pressure while the unit is
running. if less than 5.2" WC, adjust
the gas supply pressure above 5.2" but
less than 11". if greater than 5.2" WC,
replace the gas pressure switch.
Water temperature too hot. Thermostat set too high. Set thermostat to a lower setting.
Heater makes sounds: sizzling. Condensation on outside of
tank, normal.
Rumbling. Sediment accumulation on
bottom of tank.
Drain a quantity of water through
drain valve. if rumbling persists,
call a service agent.
Delime heater.
Ticking or metallic sounds. expansion and contraction -
normal.
Pounding. Air chambers in piping have
become waterlogged.
Drain piping system and rell.
Heater must be off while this is
being done.
Combustion noises. Too much primary air. Call service agent.
overred heater; incorrect
burners or orice for type of gas
used.
Call service agent. Check and correct as necessary.
Water leaks. Drain valve not closed tightly. if drain valve cannot be closed
tightly, replace.
Possible condensation if tank
is undersized or stored water is
below 110 degrees.
increase tank temperature
setting (add a mixing valve
if setting will be above 120
degrees).
if leakage source cannot be
corrected or identied, call
service agent.
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. Heater is over red shut off gas supply to heater
and call a service agent.
Check for sooted ue passage.
Check for obstructed vent line.
Check backdraft or lack of draft
Possible gas leaks. shut off gas supply to heater
and call gas company at once
operational checklist