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The fan can be heard after
operation is stopped.
A motor can be heard when turning
the unit ON or OFF, when opening
or closing a fixture, or after the unit
has been running for a while.
• These noises indicate the proper operation of devices
which are designed to let the unit reignite more quickly,
and ensure the water temperature is stable.
The 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 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?)
• This is normal. The white smoke is actually steam.
White smoke comes out of the
exhaust vent on a cold day.
Other
Sounds
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 bath 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 bath tub/wash-basin can be
prevented by cleaning frequently.
Frequent water discharge from the
drain pipe.
• Condensation forms inside the unit during operation
and is discharged from the drain pipe.
