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PROBLEM
SLOW HOT WATER
RECOVERY
DRIP FROM RELIEF VALVE
THERMOSTAT FAILS TO
SHUT-OFF
COMBUSTION ODORS
SMOKING AND CARBON
FORMATION (SOOTING)
CONDENSATION
BURNER FLAME FLOATS
AND LIFTS OFF PORTS
BURNER FLAME TOO HIGH 1.
FLAME BURNS AT ORIFICE
PILOT FLAME
TOO SMALL
TROUBLESHOOTING CHART (CONTINUED)
POSSIBLE CAUSE(S)
1.
Insufficient combustion air
2.
Water heater flue or vent system
blocked
3.
Low gas pressure
4.
Improper calibration
5.
Base-Ring Filter blocked with lint/dust
6.
FVIR Flame Arrestor blocked with lint/
dust.
1.
Excessive water pressure
2.
Heater stacking
3.
Closed water system
1.
Thermostat not functioning properly
2.
Improper calibration
1.
Insufficient combustion air
2.
Water heater flue or vent system
blocked
3.
Heater installed in a confined area
4.
Base-Ring Filter blocked with lint/dust
5.
FVIR Flame Arrestor blocked with lint/
dust.
1.
Insufficient combustion air
2.
Low gas pressure
3.
Water heater flue or vent system
blocked
4.
Thermostat not functioning properly
5.
Heater installed in a confined area
6.
Burner flame yellow-lazy
7.
Base-Ring Filter blocked with lint/dust
8.
FVIR Flame Arrestor blocked with lint/
dust.
1.
Temperature setting too low
1.
Orifice too large
2.
High gas pressure
3.
Water heater flue or vent system
blocked
4.
Cold drafts
Orifice too large
1.
Thermostat not functioning properly
2.
Low gas pressure
1.
Pilot line or orifice clogged
2.
Low gas pressure
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.
Clean filter, See "External Cleaning &
Inspection of the Base-Ring Filter" section.
6.
Clean filter, See "Cleaning the Combustion
Chamber and Flame-Arrestor" section.
1.
Use a pressure reducing valve and relief
valve
2.
Lower the thermostat setting
3.
See "Closed System/Thermal Expansion"
1.
Replace thermostat
2.
Replace thermostat
1.
Provide ventilation to water heater. Check flue
way, flue baffle, and burner
2.
Clean, locate source and correct
3.
Provide fresh air ventilation
4.
Clean filter, See "External Cleaning &
Inspection of the Base-Ring Filter" section.
5.
Clean filter, See "Cleaning the Combustion
Chamber and Flame-Arrestor" section.
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"
7.
Clean filter, See "External Cleaning &
Inspection of the Base-Ring Filter" section.
8.
Clean filter, See "Cleaning the Combustion
Chamber and Flame-Arrestor" section.
1.
Increase the temperature setting. Refer to the
"Condensation" sub-section of this manual's
Troubleshooting Guide.
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
1.
Replace with correct orifice
1.
Replace thermostat
2.
Check with gas utility company
1.
Clean, locate source and correct
2.
Check with gas utility company
38
CORRECTIVE ACTION
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Table of Contents
Troubleshooting
