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TROUBLESHOOTING GUIDELINES
These guidelines should be utilized by a quali
fi
ed service agent.
PROBLEM
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
BURNER FLAME
TOO HIGH
1. Air inlets blocked
2. Insuf
fi
cient secondary air
3. Ori
fi
ce too large
1. Unblock inlet air openings
2. Provide ventilation to water heater
3. Replace with correct ori
fi
ce
FLAME BURNS
AT ORIFICE
1. Low gas pressure
2. Defective gas control valve/thermostat
1. Check with gas utility company
2. Replace gas control valve/thermostat
INSUFFICIENT
HOT WATER
1. Low gas pressure
2. Ori
fi
ce too small
3. Thermostat set too low
4. Gas control error codes
5. Sediment or lime in tank
6. Water heater too small
7. Wrong piping connections
8. Leaking
faucets
9. Wasted hot water
10. Long runs of exposed piping
11. Hot-water piping in outside wall
1. Check with gas utility company
2. Replace with correct ori
fi
ce (see rating
plate)
3. Turn temperature knob to higher setting
4. Refer to gas control error codes
5. Drain/
fl
ush-provide water treatment if
needed
6. Install adequate heater
7. Correct piping: dip tube must be in cold
inlet
8. Repair
faucets
9. Advise
customer
10. Insulate piping
11. Insulate piping
WATER IS TOO HOT
1. Thermostat is set too high
2. Defective gas control valve/thermostat
1. Turn temperature knob to lower setting
2. Replace the gas control valve/
thermostat
SLOW HOT WATER
RECOVERY
1. Insuf
fi
cient air/
fl
ue blockage
2. Low gas pressure
3. Ori
fi
ce too small
4. Thermostat set too low
5. Heater too small
6. Wrong piping connection
7. Wasted hot water
8. Flue
clogged
9. Air inlets blocked
1. Provide ventilation to water heater.
Check
fl
ue way,
fl
ue baf
fl
e and burner
2. Check with gas utility company
3. Replace with correct ori
fi
ce (see rating
plate)
4. Turn temperature knob to higher setting
5. Install adequate heater
6. Correct piping-dip tube must be in cold
inlet
7. Advise
customer
8. Clean
fl
ue, locate source and correct
9. Unblock inlet air openings
DRIP FROM
RELIEF VALVE
1. Pressure
build-up
2. Heater
stacking
3. Closed water system
4. Improperly seated valve
1. Use a pressure-reducing valve and
relief valve
2. Lower the thermostat setting
3. See “Thermal Expansion” section
4. Check Relief valve for proper operation
(Do Not plug T&P valve)
GAS CONTROL VALVE/
THERMOSTAT FAILS TO
SHUT OFF
1. Defective gas control valve/thermostat 1. Replace gas control valve/thermostat
SMELLY WATER
1. Sul
fi
des in water supply
2. Bacteria in water supply
3. Incompatible
anode
1. Chlorination
procedure
2. Chlorination
procedure
3. Replace with anode appropriate for
water conditions