PROBLEM |
| POSSIBLE CAUSE(S) |
| CORRECTIVE ACTION |
PILOT WILL NOT REMAIN LIT | 1. | Air in gas line | 1. | Bleed the air from the gas line |
| 2. | Dirt in gas lines | 2. | Notify |
| 3. | Pilot line or orifice clogged | 3. | Clean, locate source and correct |
| 4. | Thermocouple connection loose | 4. | Finger tighten; then 1/2 turn with wrench |
| 5. | 5. | Replace thermocouple | |
| 6. | Cold drafts | 6. | Locate source and correct |
| 7. | Flammable vapors incident, Flame | 7. | Eliminate flammable vapor source(s) |
| 8. | LockTM function utilized | 8. | Call |
| Low gas pressure | Check with gas utility company | ||
| 9. | Air for combustion obstructed | 9. | See maintenance section for inspection and |
| 10. | Pilot dirty | 10. | cleaning of |
| Clean pilot | |||
HIGH OPERATION COSTS | 1. | Thermostat set too high | 1. | Set temperature dial to lower setting |
| 2. | Sediment or lime in tank | 2. | |
| 3. | Water heater too small for job | 3. | Install adequate heater |
| 4. | Wrong piping connections | 4. | Correct |
| 5. | Leaking faucets | 5. | Repair faucets |
| 6. | Gas leaks | 6. | Check with |
| 7. | Wasted hot water | 7. | Advise customer |
| 8. | Long runs of exposed piping | 8. | Insulate piping |
| 9. | Hot water piping in exposed wall | 9. | Insulate piping |
INSUFFICIENT HOT WATER | 1. | Thermostat set too low | 1. | Turn temperature dial to desired setting |
| 2. | Sediment or lime in tank | 2. | |
| 3. | Water heater too small | 3. | Install adequate heater |
| 4. | Wrong piping connections | 4. | Correct |
| 5. | Leaking faucets | 5 | Repair faucets |
| 6. | Wasted hot water | 6. | Advise customer |
| 7. | Long runs of exposed piping | 7. | Insulate piping |
| 8. | Hot water piping in outside wall | 8. | Insulate piping |
| 9. | Low gas pressure | 9. | Check with gas utility company |
SLOW HOT WATER | 1. | Insufficient air | 1. | Provide ventilation to water heater. Check flue |
RECOVERY | 2. | Flue clogged | 2. | way, flue baffle, and burner |
| Clean flue, locate source and correct | |||
| 3. | Low gas pressure | 3. | Check with gas utility company |
| 4. | Improper calibration | 4. | Replace thermostat |
| 5. | Thermostat set too low | 5. | Turn temperature dial to desired setting |
| 6. | Water heater too small | 6. | Install adequate heater |
| 7. | Wrong piping connections | 7. | Correct |
| 8. | Wasted hot water | 8. | Advise customer |
DRIP FROM RELIEF VALVE | 1. | Excessive water pressure | 1. | Use a pressure reducing valve and relief |
| 2. | Heater stacking | 2. | valve |
| Lower the thermostat setting | |||
| 3. | Closed water system | 3. | See “Closed System/Thermal Expansion” |
THERMOSTAT FAILS TO | 1. | 1. | Replace thermostat | |
SHUT OFF | 2. | Improper calibration | 2. | Replace thermostat |
COMBUSTION ODORS | 1. | Insufficient air | 1. | Provide ventilation to water heater. Check flue |
| 2. | Flue clogged | 2. | way, flue baffle, and burner |
| Clean, locate source and correct | |||
| 3. | Heater installed in a confined area | 3. | Provide fresh air ventilation |
SMOKING AND CARBON | 1. | Flammable vapor incident | 1. | Call |
FORMATION (SOOTING) |
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CONDENSATION | 1. | Temperature setting too low | 1. | Increase the temperature setting |
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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. | Flue clogged | 3. | Clean flue and |
| 4. | Cold drafts | 4. | correct |
| Locate source and correct | |||
| 5. | Dirty burner screen | 5. | Clean burner screen. See “Natural Gas Burner |
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| (Ultra Low Nox)” section of this manual. |
FLAME BURNS AT ORIFICE | 1. | 1. | Replace thermostat | |
| 2. | Low gas pressure | 2. | Check with gas utility company |
| 3. | 3. | Replace burner assembly | |
PILOT FLAME TOO SMALL | 1. | Pilot line or orifice clogged | 1. | Clean, locate source and correct |
| 2. | Low gas pressure | 2. | Check with gas utility company |
| 3. | Dirty pilot | 3. | Clean pilot |
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