33
Troubleshooting (cont’d)
PROBLEM
CAUSE
SOLUTION
Blower will not run.
A) “ON/OFF” control switch turned off.
Turn switch to the “ON” position.
B) Blower unplugged.
Plug blower back into 115 VAC. outlet.
C) No power at outlet.
Repair service to outlet.
D) Thermostat defective.
Replace thermostat.
E) Control harness defective.
Replace control harness.
F) High limit control circuit open.
Replace ECO.
NOT ENOUGH
G) Blower motor defective.
Replace Blower Assembly.
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.
A) Defective air flow restrictor.
Take unit out of service immediately, call a
service representative.
B) Not enough dilution air to mix with
Proper dilution air must be provided for comb-
flue gases in inlet elbow.
ustion and dilution of flue temp. Refer to “INSTAL-
VENT PIPE TOO HOT
LING THE NEW WATER HEATER” section.
(ABOVE 170˚F)
C) Dilution air too hot for mixing with
Supply air is too hot. Check for heat sources
flue gases.
around 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.
B) Combustion air path restricted.
Check intake venting arrangements for
YELLOW FLAME
obstructions.
C) Not enough dilution air for proper
Check Intake venting arrangement for
combustion.
obstructions.
A) Water on the floor under heater.
See “CONDENSATION” section.
CONDENSATION
B) Water dripping from blower assembly. Provide drip “TEE” to catch condensation from
horizontal section of exhaust vent close to
blower assembly.
Improperly sealed, hot or cold supply
connections, relief valve, drain valve
Tighten threaded connections.
WATER LEAKS
or thermostat threads.
Leakage from other appliances or water
Inspect other appliances near water heater.
lines.
Condensation of flue products.
See “CONDENSATION” section.
Thermal expansion in closed water
Install thermal expansion tank (DO NOT plug
LEAKING T&P
system.
T&P valve).
Improperly seated valve.
Check relief valve for proper operation
(DO NOT plug T&P valve).
HOT WATER ODORS
High sulfate or mineral content in
Drain and flush heater thoroughly then refill.
(Refer to CATHODIC
water supply.
PROTECTION
Bacteria in water supply.
Chlorinate water supply.
WATER TOO HOT
Thermostat set too high.
Refer to TEMPERATURE REGULATION.
WATER HEATER SOUNDS
Condensation dripping on burner.
See “CONDENSATION” section.
SIZZLING-RUMBLING
Sediment at bottom of heater tank.
Clean sediment from tank. Refer to DRAINING
instruction in Maintenance section of manual.
SOOTING
Improper combustion.
Refer to COMBUSTION AIR AND VENTILATION
on pages 8 and 9.
HEATER LIGHTS BUT
Outlet polarity is reversed.
Test polarity and correct.
GOES OUT IN 4-5
SECONDS
