36
PROBLEM
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
BURNER FLAME TOO
HIGH
Insuf
fi
cient secondary air
Ori
fi
ce too large
1.
2.
Provide ventilation to water heater
Replace with correct ori
fi
ce
1.
2.
FLAME BURNS AT
ORIFICE
Low gas pressure
D e f e c t i v e g a s c o n t r o l
(thermostat)
1.
2.
Check with gas utility company
Replace gas control (thermostat)
1.
2.
INSUFFICIENT HOT
WATER
Low gas pressure
Ori
fi
ce too small
Thermostat set too low
Gas control error codes
Sediment or lime in tank
Water heater too small
Wrong piping connections
Leaking faucets
Wasted hot water
Long runs of exposed piping
Hot water piping in outside
wall
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Check with gas utility company
Replace with correct ori
fi
ce
Turn temperature knob to higher setting
Refer to gas control error code in the Installation
and Operating Manual
Drain/
fl
ush-provide water treatment if needed
Install adequate heater
Correct piping: dip tube must be in cold inlet
Repair faucets
Advise customer
Insulate piping
Insulate piping
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
WATER IS TOO HOT
Thermostat is too high
D e f e c t i v e g a s c o n t r o l
(thermostat)
1.
2.
Turn temperature knob to lower setting
Replace the gas control (thermostat)
1.
2.
SLOW HOT WATER
RECOVERY
Insuf
fi
cient secondary air
Low gas pressure
Ori
fi
ce too small
Thermostat set too low
Heater too small
Wrong piping connection
Wasted hot water
Flue clogged
1.
2.
3.
4.
5.
6.
7.
8.
Provide ventilation to water heater. Check
fl
ue
way,
fl
ue baf
fl
e and burner
Check with gas utility company
Replace with correct ori
fi
ce
Turn temperature knob to higher setting
Install adequate heater
Correct piping-dip tube must be in cold inlet
Advise customer
Clean
fl
ue, locate source and correct
1.
2.
3.
4.
5.
6.
7.
8.
DRIP FROM RELIEF
VALVE
Pressure build-up
Heater stacking
Closed water system
Improperly seated valve
1.
2.
3.
4.
Use a pressure reducing valve and relief valve
Lower the thermostat setting
See “Thermal Expansion” Section in the
Manual
Check Relief valve for proper operation (Do Not
plug T&P valve)
1.
2.
3.
4.
GAS CONTROL/
THERMOSTAT FAILS TO
SHUT OFF
D e f e c t i v e g a s c o n t r o l
(thermostat)
1.
Replace gas control (thermostat)
1.
SMELLY WATER
Sul
fi
des in water supply
Bacteria in water supply
1.
2.
See “Smelly water” section in the Manual
See “Smelly water” section in the Manual
1.
2.
CONDENSATION
Filling the new water heater for
the
fi
rst time
Moisture from the products of
combustion
Water dripping from blower
assembly
Undersized water heater
1.
2.
3.
4.
Normal operation: the condensation should
disappear after heater warms up
Normal operation: the condensation should
disappear in time
Provide drip “TEE” to the horizontal section of
exhaust vent close to blower assembly
Install adequate heater
1.
2.
3.
4.
COMBUSTION ODORS
Insuf
fi
cient secondary air
Flue clogged
Heater installed in a con
fi
ned
area
House too tight
1.
2.
3.
4.
Provide fresh air ventilation to the water heater
Clean, locate source and correct
Provide fresh air ventilation to the water heater
Provide fresh air ventilation to the water heater
1.
2.
3.
4.
TROUBLESHOTING CHART
