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For your safety, water heater service should be performed only by a qualified service technician.
PROBLEM
NOT ENOUGH OR NO HOT WATER
CONDENSATION
WATER LEAKS
LEAKING T&P VALVE
HOT WATER ODORS OR COLOR
(Refer to CATHODIC PROTECTION)
TROUBLESHOOTING
Read the GENERAL SAFETY INFORMATION section first
POSSILBE MALFUNCTION
1) Blower will not run.
A) "ON/OFF" control switch turned off.
B) Blower unplugged.
C) No power at outlet.
D) "ON/OFF" switch defective.
E) Control harness defective.
F) Blower motor defective.
2) Blower running, burner not on
A) Fan not running fast enough to close
air switch contacts.
B) Air pressure switch defective.
C) Gas valve defective.
D) Control harness defective.
E) Igniter defective.
F) Unit has completed three trials to light
and fail.
3) Thermostat problems
A) Thermostat set too low.
B) Thermostat or ECO defective.
C) High limit control circuit open.
4) Others
A) Heater undersized.
B) Low gas pressure.
C) Incoming water is unusually cold.
D) Leaking hot water pipes or fixtures.
A) Water on the floor under heater.
Improperly sealed, hot or cold supply
connections, relief valve, drain valve or
thermostat threads.
Leakage from other appliances or water
lines.
Condensation of flue products.
Thermal expansion in closed water sys-
tem
Improperly seated valves
High sulfate or mineral content in water
supply or iron or sulfate reducing bacteria
in water supply
SERVICE TO BE PERFORMED
Turn switch to the on position.
Plug blower back into 115 vac. outlet.
Repair service to outlet.
Replace switch.
Replace control harness.
Replace blower and motor.
Replace switch.
Check for low voltage, less than 102 vac.,
have service checked and repaired.
Replace switch.
Replace gas control valve/ thermostat.
Replace harness.
Replace ignitor.
Reset cycle by turning switch off and then
back on. If unit does not light in three tri-
als, contact a qualified person for service.
Set temperature control higher.
Replace gas control valve/thermostat.
Replace high limit control.
Reduce hot water usage.
Contact a qualified person for service.
Allow more time for heater to re-heat.
Have plumber check and repair leaks.
See "Condensation"
Turn off heater & water, repair unit.
Inspect other appliances near water
heater.
Refer to "CONDENSATION"
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, chlori-
nate, refil and flush again then chlorinate
water supply.
17
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