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