Troubleshooting your Admiral gas cooktop when burners aren't heating properly
When all gas burner flames are weak on the cooktop, check the gas supply shut-off valve to make sure it's fully open. If the shut-off valve is fully open and all burner flames are weak, you may need to have your gas supplier check the gas supply pressure.
If gas supply pressure is okay, a failed pressure regulator on the cooktop may be restricting flow to the burners.
If a single burner isn't heating properly, check the burner head for a spill and clean the burner head if it's clogged.
How to clean grates and burner caps on your Admiral gas cooktop
Allow the burners and cooktop to cool completely before you start cleaning. You can use gas grate cleaner to safely clean most grates and burner caps. You can order cleaner here.
Here's how it works. Fill your kitchen sink with about 2 gallons of water. It doesn't have to be hot water because you're going to soak the grates overnight.
Add 3 tablespoons of gas grate cleaner to the water. Stir the water until the granules completely dissolve. This stuff is strong, so wear gloves and avoid getting it on your skin. If you do, rinse it off.
Completely immerse the grates and burner caps in the cleaning solution and soak them overnight.
The next day, put on some rubber gloves and drain the sink. Using a scrub brush or abrasive pad, clean softened soil and residue from the grates and burner caps and rinse everything thoroughly. Wipe the grates clean with a towel.