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BURNER FLAME FLOATS AND
LIFTS OFF PORTS
1. Orifice too large
2. High gas pressure
3. Flue clogged
4. Cold drafts
1. Replace with correct orifice
2. Check with gas utility company
3. Clean flue and burner-locate source and correct
4. Locate source and correct
BURNER FLAME TOO HIGH
1. Orifice too large 1. Replace with correct orifice
FLAME BURNS AT ORIFICE
1. Defective thermostat
2. Low gas pressure
1. Replace thermostat
2. Check with gas utility company
PILOT FLAME
TOO SMALL
1. Pilot line or orifice clogged
2. Low gas pressure
1. Clean, locate source and correct
2. Check with gas utility company
SLOW HOT WATER RECOVERY
DRIP FROM RELIEF VALVE
THERMOSTAT FAILS TO SHUT
OFF
CONDENSATION
COMBUSTION ODORS
SMOKING AND CARBON
FORMATION (SOOTING)
1. Provide ventilation to water heater. Check flue way,
flue baffle, burner
2. Check with gas utility company
3. Clean, locate source and correct
4. Replace thermostat
5. Provide fresh air ventilation
6. See “Burner Flame Yellow-Lazy”
1. Insufficient secondary air
2. Low gas pressure
3. Flue clogged
4. Defective thermostat
5. Heater installed in a confined area
6. Burner flame yellow-lazy
1. Insufficient secondary air
2. Flue clogged
3. Heater installed in a confined area
1. Provide ventilation to water heater. Check flue
way, flue baffle, and burner
2. Clean, locate source and correct
3. Provide fresh air ventilation
1. Temperature setting too low 1. Increase the temperature setting
1. Replace thermostat
2. Replace thermostat
1. Defective thermostat
2. Improper calibration
1. Use a pressure reducing valve and relief valve
2. Lower the thermostat setting
3. See “Closed System/Thermal Expansion”
1. Excessive water pressure
2. Heater stacking
3. Closed water system
1. Provide ventilation to water heater. Check flue way,
flue baffle, and burner
2. Clean flue, locate source and correct
3. Check with gas utility company
4. Replace thermostat
5. Turn temperature dial to desired setting
6. Install adequate heater
7. Correct piping-dip tube must be in cold inlet
8. Advise customer
1. Insufficient secondary air
2. Flue clogged
3. Low gas pressure
4. Improper calibration
5. Thermostat set too low
6. Water heater too small
7. Wrong piping connections
8. Wasted hot water
PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION
TROUBLESHOOTING CHART (continued)
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