1. Go to the hardware store to buy a 1.2mm drill and borrow a hand drill.

2. Remove the 0.8mm nozzle from the liquefied gas furnace, manually ream the hole with a tool, and change the aperture to1.2mm. ..

3. Install the purchased nozzle to the position of the original nozzle.

4. Let off the gas in the original pipeline, then connect the pipeline and check whether the connection is tight to prevent air leakage.

5. Use the reformed natural gas furnace to see if there is any abnormality.