18
Other
The Water Heater stops burning during operation.
• Are the gas and water supply valves fully open?
• Is the water supply cut off?
• Is the hot water fixture/faucet sufficiently open?
• Is the gas being cut off by the gas meter? (Can
other gas devices such as stoves be used?)
• (For LP) Is there enough gas in the tank? (Can
other gas devices such as stoves be used?)
White smoke comes out of the exhaust vent on a
cold day.
• This is normal. The white smoke is actually
steam.
The hot water is turbid.
• This is harmless. Small bubbles appear as the air
in the water is heated and depressurized rapidly
to atmospheric pressure.
The water appears blue.
The tub/wash-basin has turned blue.
• Coloration to a blue color may be noticed from
small traces of copper ion contained in the
water and fat (furring). However, there are not
problems concerning health. Coloration of the
tub/wash-basin can be prevented by cleaning
frequently.
Frequent water discharge from the condensate
drain pipe.
• Condensation forms inside the Water Heater
during operation and is discharged from the
condensate drain pipe.
Check for an Error Code on the Remote
Controller
Contact Noritz America if:
• Any other error code appears.
• An error code is indicated again after the above
actions were followed.
• There are any other questions.
Error Code : 11
Cause : Ignition failure
Action : Check whether the gas valve is open. Press
the button to turn the Water Heater off,
open a hot water fixture/faucet, and turn
the Water Heater back on. If the blinking
number doesn’t return the problem is
solved.
Error Code : 90
Cause : [When supplying combustion air from the
indoors]
The air supply vent may be clogged.
Action : Check air supply vent for blockage or
obstruction. (See page 14)
Cause : Exhaust vent may be clogged.
Action : Check exhaust vent for blockage or
obstruction.
Cause : Abnormal combustion, low gas supply
pressure.
Action : Have a professional check the gas supply
pressure.
Cause : Condensate drain line may be clogged.
Action : Check condensate drain line is clogged or
frozen. If the display continues, contact
nearest Noritz agent.
Error Code : 99
Cause : Abnormal combustion
Action : Contact the nearest Noritz agent.
Error Code : C1# (# = 1-9)
Cause : Service Reminder (Notice for periodic
maintenance)
Action : This Water Heater is equipped with an
automatic service reminder.
Excessive scale build-up may cause
premature failure of the Heat Exchanger.
Excessive dust or lint build-up in the fan
and air intake may affect efficiency and
combustion performance.
Contact Noritz America for additional
information about recommended
maintenance procedures (1-866-766-
7489).
When a failure occurs, information relating to the
error blinks on the display.
If this occurs, take appropriate measures as the
following list.
Blinking
Troubleshooting
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