In one sentence, describe what the following article is about:

Toggle your furnace from "Off" to "On." Immediately after doing so, open the bleeder valve a half turn counterclockwise. The tubing should eject a combination of oil and air. The force of oil and air running through the tubing can cause it to move. You or a helper may want to hold the tubing and container to prevent accidental spills. It may be necessary to use the reset button to turn on the furnace. Follow your furnace's user instructions for best results. Opening the bleeder valve more or less will increase or decrease the rate at which the oil drains. Adjust this as necessary for your situation. The bleeder screw may have to be completely removed to get a good flow. Shut the furnace off once the flow has started. Replace the screw and restart furnace when through bleeding. If you've hit your reset button multiple times, a safety lock out feature may be preventing you from pressing it again. To restore the reset button, press and hold it for 35 seconds, then release. After a few seconds, the bleeder should begin to expel an uninterrupted flow of oil. Allow the line to drain a few seconds after this to ensure all air has been removed. Close the bleeder by turning it clockwise until firm. In some cases, especially if the pump is far from the oil tank, you may need to bleed your line into your container several times until all the air is removed from it. If there is no discharge from the bleeder, there may be a problem with the pump, a clog in the filter, or damage somewhere in the fuel line preventing it from draining. Fuel that has been drained into a clean, dry container can be returned to the fuel tank after it has been drained. The bleeder valve should be returned to the fully closed position you found it in. The furnace should be switched to the "On" position. At this point, the furnace should relight. If the furnace is operating properly, you should be able to view an orange glow or fire through the inspection port located on the front of the furnace. If your furnace does not relight, drain the line again as described. You may have to bleed the line several times before it begins working again.

Summary:
Turn on the furnace and open the bleeder. Resolve locked out reset buttons, if necessary. Bleed the line until only fuel comes out. Check the burner for ignition.