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PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION
DRIP FROM RELIEF VALVE
1. Excessive water pressure
2. Closed water system
1. Use a pressure reducing valve and relief
valve
2. See “Thermal Expansion”
THERMOSTAT FAILS TO
SHUT OFF
1. Non-functioning thermostat
2. Improper calibration
1. Replace thermostat
2. Replace thermostat
COMBUSTION ODORS 1. Insufficient air
2. Water heater flue or vent system blocked.
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. Flammable vapor incident 1. Call 1-800-4-MY-HOME
®
(1-800-469-4663)
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. Water heater flue or vent system blocked.
4. Cold drafts
5. Dirty burner screen
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
5. Clean burner screen. See “Ultra Low
NOx Natural Gas Burner” section of this
manual.
FLAME BURNS AT ORIFICE 1. Non-functioning thermostat
2. Low gas pressure
3. Non-functioning burner
1. Replace thermostat
2. Check with gas utility company
3. Replace burner assembly
PILOT FLAME TOO SMALL 1. Pilot line or orifice clogged
2. Low gas pressure
3. Dirty pilot
1. Clean, locate source and correct
2. Check with gas utility company
3. Clean pilot
TROUBLESHOOTING GUIDE (Continued)