1, the battery is dead. Check whether the battery is charged. If the battery is dead, it will show weak ignition or no ignition at all. Generally, it can be solved after replacing the battery.
2. The inlet pressure is too low. Nowadays, all gas water heaters can be started with low water pressure, but if the water inlet pressure is too low, the water-gas linkage valve will not start, indicating that there is no ignition. Of course, the blockage of the filter at the water inlet will also cause the water flow to be too small, so just clean it up.
3. The water pressure diaphragm of water-gas linkage valve is aging. When the hydraulic diaphragm loses its elasticity due to aging, it will lead to the inflexible slider. At this time, even if the water pressure is normal, the gas will not pass through, which means it can be used normally for the first time, but it will take some time for the slider to reset normally for the second time, or the light will not be lit at all.
4. The flue is blocked. The blockage of flue will lead to the failure of high-temperature exhaust gas to be discharged, resulting in reflux pressure and ignition failure. We can judge according to the fire and the displacement, and generally can ignite normally after dredging.
5. The air pressure is abnormal. The air pressure of natural gas pipeline network is generally normal, but the gas tank is not necessarily. If the air pressure is too high or too low, it will not catch fire. Adjust the liquefied gas pressure reducing valve or replace the rubber mold.