American Water Heater Power Flex 40-42K BTU Installation Instructions Manual page 22

TROUBLESHOOTING
PROBLEM
NO HOT WATER
NOT ENOUGH
HOT WATER
VENT PIPE TOO HOT
(ABOVE 170°F)
YELLOW FLAME
CONDENSATION
WATER LEAKS
LEAKING T&P
HOT WATER ODORS
(See ANODE ROD/WATER
ODOR, Section)
WATER TOO HOT
WATER HEATER SOUNDS
SIZZLING-RUMBLING
SOOTING
HEATER LIGHTS BUT
GOES OUT IN 4-5
SECONDS
22
CAUSE
Blower will not run.
A) Blower unplugged.
B) No power at outlet.
C) Thermostat defective.
D) High limit control circuit open.
E) Blower motor defective.
F) Pressure switch defective.
Thermostat problems.
A) Thermostat set too low.
B) Thermostat or ECO defective.
Others
A) Heater undersized.
B) Low gas pressure.
C) Incoming water is unusually cold.
D) Leaking hot water pipes or fixtures.
A) Defective air flow restrictor
B) Not enough dilution air to mix with flue
gases in inlet elbow.
C) Dilution air too hot for mixing with flue
gases.
D) Wrong burner orifice.
A) Dirt in burner ports.
B) Combustion air path restricted.
C) Not enough dilution air for proper
combustion.
A) Water on the floor under heater.
B) Water dripping from blower assembly.
A) Improperly sealed, hot or cold supply
connections, relief valve, drain valve or
thermostat threads.
B) Leakage from other appliances or water
lines.
C) Condensation of flue products.
A) Thermal expansion in closed water
system.
B) Improperly seated valve.
A) High sulfate or mineral content in water
supply.
B) Bacteria in water supply.
A) Thermostat set too high.
A) Condensation dripping on burner.
B) Sediment at bottom of heater tank.
A) Improper combustion.
A) Outlet polarity is reversed.
cont.
Plug blower back into 115 VAC. outlet.
Repair service to outlet.
Replace thermostat.
Replace ECO.
Replace Blower Assembly.
Replace Pressure Switch/Blower Assembly.
Set temperature control higher.
Replace thermostat or ECO as required.
Reduce hot water use.
Contact dealer.
Allow more time for heater to reheat.
Have plumber check and repair leaks.
Take unit out of service immediately, call a qualified
person to service the unit.
Proper dilution air must be provided for combustion
and dilution of flue temp. See "Combustion Air
Supply/Vent Pipe System", section.
Supply air is too hot. Check for heat sources around
intake terminal and blockage of dilution air leg.
Install correct orifice.
Turn off heater and gas, clean burner head.
Check intake venting arrangements for obstructions.
Check intake venting arrangements for obstructions.
See "OPERATIONAL CONDITIONS", section.
Provide drip "TEE" to catch condensation from
horizontal section of exhaust vent close to blower
assembly.
Tighten threaded connections.
Inspect other appliances near water heater.
See "OPERATIONAL CONDITIONS", section.
Install thermal expansion tank (DO NOT plug T&P
valve).
Check relief valve for proper operation (DO NOT
plug T&P valve).
Drain and flush heater thoroughly then refill.
Chlorinate water supply.
See "WATER TEMPERATURE REGULATION",
section.
See "OPERATIONAL CONDITIONS", section.
See "MAINTENANCE OF YOUR WATER HEATER",
section.
See "Combustion Air Supply/Vent Pipe System",
section.
Test polarity and correct.
SOLUTION