A.O. Smith 186589-004 - Manual (Page 27)

27
PROBLEM POSSIBLE CAUSE(S) CORRECTION
SLOW HOT WATER RECOV-
ERY
1. Insuffi cient secondary air
2. Flue clogged
3. Low gas pressure
4. Improper calibration
5. Gas control/thermostat set too low
6. Water heater too small
7. Wrong piping connections
8. Wasted hot water
1. Provide ventilation to water heater. Check
fl ue way, fl ue baffl e and burner
2. Clean fl ue, locate source and correct
3. Check with gas utility company
4. Replace gas control/thermostat
5. Turn temperature dial to desired setting
6. Install adequate size heater
7. Correct piping-dip tube must be in cold inlet
8. Advise customer
DRIP FROM RELIEF VALVE
1. Excessive water pressure
2. Heater stacking
3. Closed water system
4. Temperature setting too high
1. Use a pressure reducing valve and relief
valve
2. Lower the thermostat setting
3. See “Closed System/Thermal Expansion”
4. Decrease the temperature setting
THERMOSTAT FAILS TO
SHUT OFF
1. Defective gas control/thermostat
2. Improper calibration 1. Replace gas control/thermostat
2. Replace gas control/thermostat
COMBUSTION ODORS
1. Insuffi cient secondary air
2. Flue clogged
3. Heater installed in a confi ned area
1. Provide ventilation to water heater. Check
fl ue way, fl ue baffl e, burner
2. Clean, locate source and correct
3. Provide fresh air ventilation
SMOKING AND CARBON
FORMATION (SOOTING)
1. Insuffi cient secondary air
2. Low gas pressure
3. Flue clogged
4. Defective gas control/thermostat
5. Heater installed in a confi ned area
6. Burner fl ame yellow-lazy
1. Provide ventilation to water heater. Check
fl ue way, fl ue baffl e, burner
2. Check with gas utility company
3. Clean, locate source and correct
4. Replace gas control/thermostat
5. Provide fresh air ventilation
6. See “Burner Flame Yellow-Lazy”
CONDENSATION
1. Temperature setting too low
2. Water heater too small 1. Increase the temperature setting
2. Install adequate size heater
BURNER FLAME FLOATS
AND LIFTS OFF PORTS
1. Orifi ce too large
2. High gas pressure
3. Flue clogged
4. Cold drafts
1. Replace with correct orifi ce
2. Check with gas utility company
3. Clean fl ue and burner-locate source & cor-
rect
4. Locate source and correct
BURNER FLAME TOO HIGH 1. Orifi ce too large 1. Replace with correct orifi ce
FLAME BURNS AT ORIFICE
1. Defective gas control/thermostat
2. Low gas pressure
3 Orifi ce not properly installed 1. Replace gas control/thermostat
2. Check with gas utility company
3 Reinstall the orifi ce