2. Obtain a permit. Most cities and counties require a permit to replace a furnace, so be sure to obtain one before you start work. You can usually get a permit from the building department of your city or county.
3. Prepare the area. You will need to clear out the area around your furnace so that the new furnace can be installed. This includes removing any furniture, appliances, or other items that may be in the way.
4. Disconnect the power to the old furnace. Be sure to turn off the power to the old furnace before you start any work. You can do this by flipping the breaker switch for the furnace to the "off" position.
5. Remove the old furnace. Once the power is turned off, you can begin to remove the old furnace. This may require you to use a variety of tools, such as a pry bar, screwdriver, and hammer.
6. Install the new furnace. Once the old furnace is removed, you can begin to install the new furnace. This may require you to use a variety of tools, such as a drill, screwdriver, and pipe wrench.
7. Connect the gas line. Once the furnace is installed, you will need to connect the gas line. This should be done by a qualified gas fitter.
8. Turn on the power. Once the gas line is connected, you can turn on the power to the new furnace. Be sure to follow the instructions provided by the manufacturer of the furnace.
9. Test the new furnace. Once the power is turned on, you should test the new furnace to make sure that it is working properly. This may require you to set the thermostat to a desired temperature and check to see if the furnace is able to maintain that temperature.
