How to Prime an Oil Heating Furnace?

Running out of oil for your furnace is certainly not wise, but with the high expense of oil, you might be enticed to attempt to squeeze every drop of oil from your tank before the next delivery. Should you try waiting as long as possible before your next delivery and accidentally let your oil tank to run dry, you may discover that air and sludge from the bottom of the empty tank have made it into your oil lines. Once you receive your next delivery, you will need to prime your oil-burning furnace so it will start.

1 Turn off the power to the furnace. There should be a toggle switch next to the furnace, but if you are unable to locate a switch, turn off the furnace breaker inside your home’s main circuit breaker box.

2 Check the furnace thermostat. Make sure the thermostat is on and set to a temperature higher than your home’s current ambient temperature. This will allow the thermostat to send the signal to the furnace that it needs to turn on to raise the temperature in your home.

How to Prime an Oil Heating Furnace?3 Locate the bleeder valve on your fuel pump. It is similar to a bleeder valve on your car’s brake system. When you face the fuel pump, the bleeder valve commonly sits on the side of the pump at the four o’clock position. The bleeder valve can also be on the front of the fuel pump; it looks like a hex nut.

4 Place a container beneath the bleeder valve to catch the fuel. Use a 7/16- or 3/8-inch wrench to loosen the valve.

5 Turn on the power to the furnace. Be prepared for air and fuel to sputter from the valve. Press the red reset button to restart the furnace. The fuel will begin to pump through the line.

6 Leave the bleeder valve open until a steady stream of fuel is established. Close the valve and the furnace should turn on automatically. Repeat this process if the furnace does not turn on automatically. It could take five or six attempts before the furnace fires.

7 Pour the captured fuel into your oil furnace fuel tank.


Here is a video reference as well

Heat with Diesel If You Run Out Of Heating Oil In Your Tank

Diesel fuel used in diesel powered vehicles and other engines, is basically No. 2 home heating oil. The only difference is that home heating oil has a dye added to it that distinguishes it from untaxed or lower-taxed fuels. The higher-taxed diesel fuels are used for over-the-road vehicles. However, if an emergency were to arise such as the home running out of heating oil, diesel fuel could be purchased at the local service station. Homeowners can substitute diesel fuel for home heating oil in any quantity necessary while awaiting delivery of home heating oil.

Step 1: Call Love Energy Fuel

Understandably, the first thing to do when you have no more heating oil is call Love Energy Fuel for a delivery. Keep in mind that this will take time, mainly when snow has blocked many roads leading to your home, you will have to use an substitute fuel, such as diesel.

Call Today For Fast Oil Delivery: (267) 323-2221

Step 2: Go to your Local Gas Station and BUY DIESEL” ***NOT GASOLINE**

Look for a gas container  or buy one at your local hardware store. The ideal container should hold at least five+ gallons of fuel. Since you do not know how long the heating oil company will take to deliver the fuel, you should buy as much diesel as possible. 


Step 3: Fill Up Your Oil Tank

Preferably, you should try to add the diesel fuel to your tank prior to your furnace running completely out of oil. If you do run out all the way, you will have to be able to bleed all of the air out of the oil line to get it back up and to run again. This will usually entail making sure that the filter, nozzle and the oil pump are all clear and taking the time to ensure that no sludge makes its way through that could cause any blockage. When you get back home, turn the home thermostat that controls the oil furnace to the “off” position, fill up your oil tank with the diesel and give it 10 minutes to settle in the tank. This will allow any sediments and impurities to settle at the bottom of the tank, thereby giving the fuel intake line access to clean fuel.

Step 4: Restart The Furnace

Restarting the furnace can be as simple as pushing the red reset button on your furnace. You may need to press the reset button several times to bleed the fuel line and restart your furnace. Once the heater has turned on, your home will be heated normally. The fuel should be enough to last you until the heating oil company delivers the heating oil you ordered.

In some cases, the fuel supply system of the furnace may need manual bleeding. To perform this procedure, you will need to have a pipe wrench a quarter-inch nylon tubing and a clean container.

Start by shutting off the furnace through the toggle switch on the unit. The next step is to locate the bleeder valve on the furnace’s oil pump. This component looks like a grease fitting and can be opened or tightened using a 1 cm wrench. Once you have located the bleeder valve, insert the 1/4 inch nylon tubing. The tube should lead into the clean empty container.

Next, turn on the furnace and loosen the bleeder valve using the wrench. Be sure to hold the nylon tubing inside the container to ensure  diesel does not spill. At first, the fuel is going to gurgle out of the tube due to the presence of air. After a couple of seconds, however, only oil will stream out of the nylon tubing. When you notice this, use the wrench to tighten the bleeder valve before restart the furnace and cleaning up the work area.


How To Locate and Read An Oil Tank Gauge


Chances are your oil tank is in the basement or outside somewhere close to the house. It’s a big metal tank.


Sticking up on top of the oil tank is a clear tube with a float inside. On the outside, it is marked: F, ¾, ½, ¼, (from top to bottom).Those numbers tell you how much of the tank is full. The float goes up and down according to how much fuel is in the tank. So, if the float is aligned with the ½ mark, the tank is half full. If the float is at the bottom of the tube or not visible, then the tank is empty or close to empty.



A standard residential oil tank holds 275 gallons. Based on that size, the following readings indicate that your tank contains approximately this many gallons:

  • 1/8 = 40 gals
  • 1/4 = 70 gals
  • 3/8 = 100 gals
  • 1/2 = 130 gals
  • 5/8 = 160 gals
  • 3/4 = 200 gals
  • 7/8 = 240 gals
  • “full” = 265 gals


Most houses have a 275-gallon tank. When full that tank holds close to 225 gallons. If the gauge reads ½ you have about 110 gallons of fuel. At ¼ you have about 55 gallons and at ¾ about 170 gallons. It is recommended to call for a refill when you're around the 1/2 and 1/4 mark in the clear tube.


At an outside air temperature of 32° (average over a 24-hour period) the typical 2500 sq.ft house will burn about 6.5 gallons per day. So if you have half a tank (110 gallons) and it’s cold out you’ll use up that fuel in about 17 days. If you’re not on automatic delivery you need to give us 5-days’ notice so you wouldn’t want to wait more than about 10 days to call for a delivery.


Find The Lowest Price Of Heating Oil In The Delaware Valley

When it comes to the price of oil… who has the lowest price for the Delaware Valley?

Love Energy Fuel Service, Inc. is a small company, so we can offer you options to save on your heating costs that you may not find anywhere else in the area.

Our Everyday Fuel Oil Discounts

If you reside in theDelaware Valley area of Pennsylvania, we offer you 5 ways to save on the price of heating oil :

  • Our Low Price Guarantee. Our fuel oil prices are usually lower than most of our competitors.
  • We Allow Low Minimum Orders. Times are hard and sometimes your budget will not allow for 100 gallons or more to be delivered, so we have lowered our minimum delivery to 50 gallons.
  • You can ask for a specific dollar amount. You can request a specific dollar amount of fuel to be delivered, as long as it is over what would be charged for the minimum 50 gallon order. (Example: Your can request $300 worth.)
  • Quantity Discounts: Purchase 150 gallons and save a few cents per gallon off of the 100 gallon price. Purchase 250 gallons and save a few cents per gallon off of the 100 gallon price.
  • Our customers receive discount coupons on our Special Deals page.

Remember the above savings are available to you everyday! With our low prices you now have more control over your fuel delivery costs.