Turn off the gas line that is located right at the fireplace as well as the supply tanks outside the home. Allow ample time for the gas log fireplace to cool for at least half a day as all gases disperse.
Check the outside of the gas log fireplace for heat by gently touching the outside structure. Slowly move to touch the interior to check for heat as well. Place a fireproof drop-cloth outside the base of the fireplace.
Put on leather gloves and retrieve a flashlight. Kneel in front of the gas log fireplace and use the flashlight to find the manufacturer's nameplate and model number placard at the top of the fireplace or in the interior corners.
Using a clean, damp cloth, wipe the nameplate or placard. Write down the manufacturer's name and model name and number if applicable.
Go online to the manufacturer's website and request a owners/troubleshooting manual or phone the manufacturer to request the same by mail.