Gas instantaneous hot-water heater

Gas instantaneous hot-water heater

Trouble caused by the deterioration of equipment

Indicators related to ignition operation

An operating switch becomes stiffer than before.
It takes several tries to ignite the pilot burner of a heater.
The ignition noise is louder than before.
The sparking sound present during ignition becomes more intermittent.

Actual case Dust was accumulated on a spark electrode and a burner, which negatively affected burning condition and resulted in abnormal combustions.

Actual case Deteriorated parts negatively affected burning condition and resulted in abnormal combustion.

Inspection and repair

Things that are observed during the use of supplied hot water

The temperature of water is generally lower than before.
A heater often shuts down.
There is an odor which was not present before.
The color of flame changed to yellow.
A sound similar to something boiling can be detected.

Actual case 炎の色が黄色くなった。

Inspection and repair

Visual indicators

Part of equipment has a hole or is discolored.
Water leaks from equipment.
There is accumulated dust in the air supply and exhaust openings.

Actual case Due to the water leak from an internal component, gas components were corroded, which caused a gas leak.

Actual case Part of the air supply and exhaust pipes got clogged with dust, causing incomplete combustion.

Inspection and repair

Gas instantaneous hot-water heater