Check the thermostat. The burner may not start unless the thermostat setting exceeds the actual room temperature by about 3-degrees F.
Check the main electric burner emergency switch to make sure that the power is in the ON position. The switch is typically located at the top of the cellar stairway, and/or on the heating unit. It is often "red".
Examine the fueses of breaker panel to see if the circuit has blown.
Check the fuel oil gauge level. The burner may have the shut down due to a lack of fuel.
IF THERE IS FUEL IN YOUR TANK: Push the reset button (usually a red button) on the burner or on the smoke stack control ONE TIME ONLY. If the burner still does not run or fails to keep running, call your fuel dealer for service.
When should I call for a fill-up?
If you have a 275 gallon tank (single tank) and your gauge says 1/8, you have less than 40 gallons of oil. You will need a fill-up soon. If you are concerned that you may run out of fuel before it can be delivered, you may want to put a couple of gallons of diesel or kerosene into the tank in an EMERGENCY. Make sure that the container (blue (kero) or yellow(diesel) never RED) containing the diesel or kerosene fuel has NEVER had gasoline in it. This will help you avoid the charges for special deliveries.