What are the reasons why natural gas won’t ignite? !
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Reasons related to natural gas itself? Reasons for the burner?
It is usually due to the burner. Blockage,
It wasn’t the burner that caused the problem; it was the natural gas.
Natural gas contains nitrogen, or not in excessive amounts
The natural gas won’t ignite – is it too wet or too cold?
Is there carbon buildup or oil contaminants on the igniter?
Is the matching of air and gas appropriate?
Our matching is quite reasonable. The main reason is that the natural gas humidity is too high.
Can it be confirmed that natural gas was emitted during ignition?
Haiyou gave some reasons, but the original poster basically rejected all of them. Then it’s not these objective reasons; if it won’t light up again, perhaps we need to look for reasons of a subjective nature. Would you hold a torch and try to light it inside the furnace?