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INSUFFICIENT HOT WATER 1. Thermostat set too low
2. Sediment or lime in tank
3. Water heater too small
4. Wrong piping connections
5. Leaking
faucets
6. Wasted hot water
7. Long runs of exposed piping
8. Hot water piping in outside wall
9. Low gas pressure
1. Turn temperature dial to desired setting
2. Drain/flush-provide water treatment if needed
3. Install adequate heater
4. Correct piping-dip tube must be in cold inlet
5 Repair
faucets
6. Advise
customer
7. Insulate
piping
8. Insulate
piping
9. Check with gas utility company
SLOW HOT WATER
RECOVERY
1. Insufficient secondary air
2. Flue
clogged
3. Low gas pressure
4. Improper
calibration
5. Water heater too small
6. Wasted hot water
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. Install adequate heater
6. Advise
customer
DRIP FROM RELIEF VALVE
1. Excessive water pressure
2. Heater
stacking
3. Closed water system
1. Use a pressure reducing valve and relief valve
2. Lower the thermostat setting
3. See “Closed System/Thermal Expansion”
THERMOSTAT FAILS TO
SHUT-OFF
1. Thermostat not functioning properly
2. Improper
calibration
1. Replace
thermostat
2. Replace
thermostat
COMBUSTION ODORS
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
SMOKING AND CARBON
FORMATION (SOOTING)
1. Insufficient secondary air
2. Low gas pressure
3. Flue
clogged
4. Thermostat not functioning properly
5. Heater installed in a confined area
6. Burner flame yellow-lazy
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”
CONDENSATION
1. Temperature setting too low
1. Increase the temperature setting
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. Thermostat not functioning properly
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
SMELLY WATER
1. Sulfides in the water
1. Replace the anode with a special anode
