What should I do if the pilot light on my water heater goes out?

If the pilot light on your water heater goes out, you should follow the manufacturer's instructions to relight it. This typically involves turning off the gas supply, waiting for the gas to dissipate, and then relighting the pilot light according to the specific steps outlined in the manual. If you are unsure or uncomfortable doing this yourself, it is recommended to contact a professional plumber or the gas company for assistance.