American Water Heater 40-42K BTU TROUBLESHOOTING cont, Blower will not run, Thermostat problems

TROUBLESHOOTING cont.

PROBLEM	CAUSE	SOLUTION
	Blower will not run.
	A) Blower unplugged.	Plug blower back into 115 VAC. outlet.
NO HOT WATER	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.
	Thermostat problems.
	A) Thermostat set too low.	Set temperature control higher.
NOT ENOUGH	B) Thermostat or ECO defective.	Replace thermostat or ECO as required.
	Others
HOT WATER	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.
	A) Defective air flow restrictor	Take unit out of service immediately, call a qualified
		person to service the unit.
VENT PIPE TOO HOT	B) Not enough dilution air to mix with flue	Proper dilution air must be provided for combustion
	gases in inlet elbow.	and dilution of flue temp. See “Combustion Air
(ABOVE 170°F)		Supply/Vent Pipe System”, section.
	C) Dilution air too hot for mixing with flue	Supply air is too hot. Check for heat sources around
	gases.	intake terminal and blockage of dilution air leg.
	D) Wrong burner orifice.	Install correct orifice.
	A) Dirt in burner ports.	Turn off heater and gas, clean burner head.
YELLOW FLAME	B) Combustion air path restricted.	Check intake venting arrangements for obstructions.
	C) Not enough dilution air for proper	Check intake venting arrangements for obstructions.
	combustion.
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.
	A) Improperly sealed, hot or cold supply	Tighten threaded connections.
	connections, relief valve, drain valve or
WATER LEAKS	thermostat threads.
	B) Leakage from other appliances or water	Inspect other appliances near water heater.
	lines.
	C) Condensation of flue products.	See “OPERATIONAL CONDITIONS”, section.
	A) Thermal expansion in closed water	Install thermal expansion tank (DO NOT plug T&P
LEAKING T&P	system.	valve).
	B) Improperly seated valve.	Check relief valve for proper operation (DO NOT
		plug T&P valve).
HOT WATER ODORS	A) High sulfate or mineral content in water	Drain and flush heater thoroughly then refill.
	supply.
(See ANODE ROD/WATER
	B) Bacteria in water supply.	Chlorinate water supply.
ODOR, Section)
WATER TOO HOT	A) Thermostat set too high.	See “WATER TEMPERATURE REGULATION”,
		section.
WATER HEATER SOUNDS	A) Condensation dripping on burner.	See “OPERATIONAL CONDITIONS”, section.
SIZZLING-RUMBLING	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	A) Outlet polarity is reversed.	Test polarity and correct.
GOES OUT IN 4-5
SECONDS

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