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TROUBLESHOOTING cont.
PROBLEM CAUSE SOLUTION
NO HOT WATER
Blower will not run.
A) Blower unplugged. Plug blower back into 115 VAC. outlet.
B) No power at outlet. Repair service to outlet.
C) Thermostat defective. Replace thermostat.
D) High limit control circuit open. Replace ECO.
E) Blower motor defective. Replace Blower Assembly.
F) Pressure switch defective. Replace Pressure Switch/Blower Assembly.
NOT ENOUGH
HOT WATER
Thermostat problems.
A) Thermostat set too low. Set temperature control higher.
B) Thermostat or ECO defective. Replace thermostat or ECO as required.
Others
A) Heater undersized. Reduce hot water use.
B) Low gas pressure. Contact dealer.
C) Incoming water is unusually cold. Allow more time for heater to reheat.
D) Leaking hot water pipes or fixtures. Have plumber check and repair leaks.
VENT PIPE TOO HOT
(ABOVE 170°F)
A) Defective air flow restrictor Take unit out of service immediately, call a qualified
person to service the unit.
B) Not enough dilution air to mix with flue
gases in inlet elbow.
Proper dilution air must be provided for combustion
and dilution of flue temp. See “Combustion Air
Supply/Vent Pipe System”, section.
C) Dilution air too hot for mixing with flue
gases.
Supply air is too hot. Check for heat sources around
intake terminal and blockage of dilution air leg.
D) Wrong burner orifice. Install correct orifice.
YELLOW FLAME
A) Dirt in burner ports. Turn off heater and gas, clean burner head.
B) Combustion air path restricted. Check intake venting arrangements for obstructions.
C) Not enough dilution air for proper
combustion.
Check intake venting arrangements for obstructions.
CONDENSATION
A) Water on the floor under heater. See “OPERATIONAL CONDITIONS”, section.
B) Water dripping from blower assembly. Provide drip “TEE” to catch condensation from
horizontal section of exhaust vent close to blower
assembly.
WATER LEAKS
A) Improperly sealed, hot or cold supply
connections, relief valve, drain valve or
thermostat threads.
Tighten threaded connections.
B) Leakage from other appliances or water
lines.
Inspect other appliances near water heater.
C) Condensation of flue products. See “OPERATIONAL CONDITIONS”, section.
LEAKING T&P
A) Thermal expansion in closed water
system.
Install thermal expansion tank (DO NOT plug T&P
valve).
B) Improperly seated valve. Check relief valve for proper operation (DO NOT
plug T&P valve).
HOT WATER ODORS
(See ANODE ROD/WATER
ODOR, Section)
A) High sulfate or mineral content in water
supply.
Drain and flush heater thoroughly then refill.
B) Bacteria in water supply. Chlorinate water supply.
WATER TOO HOT
A) Thermostat set too high. See “WATER TEMPERATURE REGULATION”,
section.
WATER HEATER SOUNDS
SIZZLING-RUMBLING
A) Condensation dripping on burner. See “OPERATIONAL CONDITIONS”, section.
B) Sediment at bottom of heater tank. See “MAINTENANCE OF YOUR WATER HEATER”,
section.
SOOTING
A) Improper combustion. See “Combustion Air Supply/Vent Pipe System”,
section.
HEATER LIGHTS BUT
GOES OUT IN 4-5
SECONDS
A) Outlet polarity is reversed. Test polarity and correct.