Homeowner DIY maintenance
If you are performing any kind of gas furnace maintenance, turn off the gas line. The valve to turn off your gas line should be located near the gas meter.
Look at the flames in the burner. You should see a steady blue flame. If you see yellow or orange flicking, call a specialist to determine if something other than natural gas is burning.
Listen for questionable noises or vibrations while the furnace is on. If you hear any unusual sounds, ask your technician for guidance.
Smell for any gas leaks. If you smell gas, do not try to light any appliance. Do not touch any electrical switch. Do not use a phone in your building. Immediately call a gas supplier from your neighbor’s phone. Remember, you may not be able to smell fuel gases. Carbon monoxide detectors are recommended and should be installed according to all local laws and regulations.
In the event that electrical, fuel or mechanical failures occur, immediately turn the gas supply off at the manual gas valve on the gas pipe before turning off electrical power to the furnace. Contact a qualified service agency as soon as possible.
Do not use this unit if any part has been under water. A flood damaged unit is extremely dangerous. Attempts to use the furnace can result in fire or explosion.