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PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION
COMBUSTION ODORS
1. Insufficient secondary air.
2. Water heater flue or vent system
blocked.
3. Heater installed in a confined area.
1. Provide ventilation to water heater. Check
flue.
2. Clean, located source and correct.
3. Provide fresh air ventilation.
WATER LEAKS
1. Improperly sealed, hot or cold sup-
ply connections, relief valve, drain
valve or thermostat threads.
2. Leakage from other appliances or
water lines.
3. Condensation of flue products.
4. Excessive water pressure.
5. Heater stacking.
6. Closed water system.
1. Tighten threaded connections.
2. Inspect other appliances near water heater.
3. See “OPERATIONAL CONDITIONS”, sec-
tion.
4. Use a pressure reducing valve and relief
valve.
5. Lower the thermostat setting.
6. See “Closed System/Thermal Expansion”.
LEAKING T&P
1. Thermal expansion in closed water
system.
2. Improperly seated valve.
1. Install thermal expansion tank (DO NOT plug
T&P valve).
2. Check relief valve for proper operation (DO
NOT plug T&P valve.
HOT WATER ODORS
1. High sulfate or mineral content in
water supply.
2. Bacteria in water supply.
1. Drain and flush heater thoroughly then refill.
2. Chlorinate water supply.
WATER HEATER SOUNDS
SIZZLING-RUMBLING
1. Condensation dripping on burner.
2. Sediment at bottom of heater tank.
1. See “OPERATIONAL CONDITIONS”, sec-
tion.
2. See “MAINTENANCE OF YOUR WATER
HEATER”, section.
SMOKING AND CARBON
FORMATION (SOOTING)
1. Insufficient secondary air.
2. Low gas pressure.
3. Water heater flue or vent system
blocked.
4. Thermostat not functioning prop-
erly.
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”.
HEATING LIGHTS BUT
GOES OUT IN 4-5
SECONDS
1. Outlet polarity is reversed. 1. Test polarity and correct.
HIGH OPERATION COSTS
1. Thermostat set too high.
2. Sediment or lime in tank.
3. Water heater too small for job.
4. Wrong piping connections.
5. Leaking faucets.
6. Gas leaks.
7. Wasted hot water.
8. Long runs of exposed piping.
9. Hot water piping in exposed wall.
1. Set temperature dial to lower 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. Check with utility-repair at once.
7. Advise customer.
8. Insulate piping.
9. Insulate piping.
THERMOSTAT FAILS TO
SHUT-OFF
1. Thermostat not functioning proper-
erly.
2. Improper calibration.
1. Replace thermostat.
2. Replace thermostat.
CONDENSATION
1. Thermostat set too high.
2. Water dripping from draft hood.
1. See “OPERATIONAL CONDITIONS” section.
2. Provide drip “TEE” to catch condensation
from horizontal section of exhaust vent close
to draft hood.
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 EXPAN-
SION”, section.
cont.