Advice on Adjusting a Furnace Gas Valve
When adjusting a furnace gas valve, it is recommended that you hire a professional to avoid gas leaks or any other accidents from occurring. Most of the time, the only tool that you will need to adjust your furnace gas valve is a screwdriver.
If this is the first time that you have adjusted the furnace gas valve, it may be worth carrying a wrench in order to remove the larger cap, as it may be screwed too tightly to remove by hand. Use a cloth to clean the area, because a dirty mechanism is an inefficient mechanism.