What is the reason why the cold water heater won't catch fire?

The reason why the air-cooled water heater can't ignite may be that the weather changes and the air pressure in the air-cooled bottle decreases, which makes it difficult to ignite or not to ignite. It may also be that the pressure reducing valve is not properly adjusted, resulting in too low air pressure to ignite in cold weather. Specific solution: Because the pure cold air reduces the gas pressure of the gas cylinder, no ignition occurs. You can take a basin at the bottom of the gas cylinder and pour some hot water into it. This can solve the problem of ignition failure of air-cooled gas water heater. Cold spots will not catch fire due to improper adjustment of pressure reducing valve. In this case, just open the air valve for half a turn, and at the same time adjust the adjustment button on the pressure reducing valve to plus sign or clockwise for several turns. The answer is applicable to Haier EC600 1-GC and Haier ES60H-HC3(E) brand water heater models.