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TROUBLESHOOTING CHART
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
FLAME BURNS AT ORIFICE
PILOT FLAME
TOO SMALL
POSSIBLE CAUSE(S)
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
1.
Excessive water pressure
2.
Heater stacking
3.
Closed water system
1.
Defective thermostat
2.
Improper calibration
1.
Insufficient secondary air
2.
Flue clogged
3.
Heater installed in a confined area
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.
Temperature setting too low
1.
Orifice too large
2.
High gas pressure
3.
Flue clogged
4.
Cold drafts
1.
Orifice too large
1.
Defective thermostat
2.
Low gas pressure
1.
Pilot line or orifice clogged
2.
Low gas pressure
(continued)
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.
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
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.
Increase the temperature setting
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
CORRECTIVE ACTION
27
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