When using equipment such as gas stoves and wall-mounted gas boilers in daily life, the pulse igniter is the core component that ensures safe ignition. Many seemingly complex faults can actually be quickly located and resolved through simple checks.

The most common issue is that after pressing the knob, there is a "da-da" pulsing sound, but no spark jumps out at all. When this happens, you should first prioritize checking the power supply: for battery-powered models, first confirm whether the battery is installed with the correct positive and negative polarity, and check if there are any leakage or rust marks on the battery surface. Alkaline batteries that have been used for more than half a year are very likely to have reduced pulse energy due to insufficient voltage. Replacing them directly with a brand-new battery of the same specification can eliminate more than 80% of such faults. For AC-powered models, check whether the power plug at the bottom of the equipment is loose, and whether the wall socket has poor contact after long-term use. You can test if the socket is powered normally by plugging in other small electrical appliances.

After ruling out power supply problems, next check the condition of the ignition needle. After long-term use, the surface of the ignition needle will accumulate oil stains, water stains, and carbon deposits left by combustion. These insulating attachments will block the generation of high-voltage arcs. You only need to gently wipe the discharge tip of the ignition needle with a dry soft cotton cloth or fine sandpaper to completely clean up the impurities on the surface. At the same time, confirm that the installation position of the ignition needle has not shifted. Under normal conditions, the distance between the tip of the ignition needle and the gas nozzle should be maintained at 3 to 5 millimeters. If the gap is too large or too small, it will directly fail to form an effective ignition arc.

Another high-frequency fault is that the spark is normal during ignition, but the flame goes out immediately as soon as the knob is released. Many users will mistakenly think that the igniter is damaged when encountering this situation. In fact, more than 90% of the reasons are related to the flameout protection mechanism: the built-in thermocouple of the equipment is not fully heated by the flame, fails to reach the working threshold above 350°C, and cannot generate enough 20-30mV induced voltage to maintain the opening of the solenoid valve. In this case, just keep pressing the knob for 3 to 5 seconds after ignition to allow the thermocouple to fully heat up, then release the knob and the flame can maintain normal combustion. If the flame still cannot be sustained after pressing for more than 10 seconds, you need to check whether the head of the thermocouple is covered by oil stains, or whether its relative position with the flame has shifted. Fine-tune the position so that the flame completely wraps the head of the thermocouple to solve the problem.