Turn off the power switch again and shut off the gas by giving the valve one quarter turn.
Diy gas furnace replacement.
Cool air also called return air gets sucked in through the bottom of the furnace heated and blown out the top supply.
The other for distributing it.
Drain line to your vacuum hose.
In a hot air system a blower forces air through ducts that open into each room.
Vacuum everywhere you see dust.
Vacuum the furnace burners and the furnace base.
The second major safety concern would be ventilation.
After all blowers are basically just large fans.
Most furnace units will already have a gas line run so making sure the connections are secure and there are no leaks will be one of the main safety concern.
Fixing a malfunctioning blower may be less daunting than you think.
To get at the back of the burners tape a 20 in.
Furnaces consist of two main operating systems.
One for generating heat.
First turn off all power to the unit and turn off the gas at the gas valve that serves the furnace.
If you are replacing an existing furnace you just need to carefully extract the old furnace from the big metal boxes then seal the new unit to the same boxes.