The gas valve is typically on the wall next to the fireplace. Allow a few minutes for all the gas to leave the piping in the fireplace. You also need to wait until all of the gas fireplace components are cool before you begin the cleaning process.
Be sure to check each log for signs of corrosion — things like cracking, splitting, or burn holes — before returning them to the fireplace for use again. When you replace the logs, put them back exactly as they were. Don’t rearrange them. The logs are designed and situated in a certain way to produce the best results.
If some of your lava rocks are too small to be vacuumed without getting sucked up in the machine, put a piece of cheesecloth over the nozzle of the vacuum cleaner and secure it with a rubber band. You can also use the vacuum hose to clean up around the vent of the heat exchanger. Use a soft-bristled brush to clean up any soot build-up.
This will help you remove any dust or debris from the inside. Wrap the vacuum hose with old rags and duct tape so it doesn’t get blackened and dirty.
You can purchase fireplace glass cleaner at any home improvement store. You should not use regular glass cleaner like Windex for this task, as the ingredients in these kinds of cleaners can have adverse reactions to the carbon deposits that accumulate on the fireplace glass.
Only use water to wipe down the inside of the gas fireplace. You don’t want to use a cleaner with harsh chemicals in it that could react badly with the heat from the fireplace.
Regardless of the material – marble, brass, gold, stone, etc. – water should work well enough to clean the exterior of your fireplace if you clean it regularly.
Use a soft cloth dipped in the soapy water to gently wipe away any grime that has formed on the exterior.
You should also check the outside vent for the gas fireplace for any debris that could cause a problem. Leaves and animal nests often become problematic in outdoor fireplace vents.
If you don’t follow the instructions in the owner’s manual, it’s possible that you could void the manufacturer’s warranty.
Most general handymen or home repair service people should be qualified to inspect fireplaces, but an HVAC specialist would be the best option.
