Ran Out of Heating Oil? Here's What to Do Right Now

Running out of heating oil is one of the more stressful home situations — especially in winter, especially at night. The good news: it's fixable, usually within hours. Here's the fastest path from cold house to running furnace.

Step 1: Confirm the Tank Is Empty

Before calling anyone, confirm you're actually out of oil. Check the tank gauge — but know that oil tank gauges can stick and read incorrectly. A gauge that shows 1/4 tank might be stuck if the float mechanism is corroded or frozen.

If the gauge shows near-empty and the furnace stopped running, assume the tank is empty or close to it and proceed to Step 2.

If the gauge shows a reasonable level but the furnace still won't start, you may have a different problem — air in the lines, a dirty fuel filter, or a mechanical furnace issue. An HVAC technician can diagnose this; calling for more oil won't fix it.

Step 2: Order an Emergency Delivery

Call your current oil dealer first. Explain that you've run out completely — use the words "emergency" and "same-day" explicitly. Most dealers have emergency capacity at a premium rate. If they can't deliver same-day, ask when the earliest possible delivery is and whether they know another dealer who can cover the gap.

If your dealer can't help quickly, call other local dealers. Emergency deliveries are available from most dealers in the Northeast; you're paying for speed, not a long-term relationship. A single emergency fill doesn't obligate you to switch dealers permanently.

Step 3: While You Wait — Keep the House Warm

While you're waiting for delivery, protect your pipes and keep temperatures livable:

• Close off unused rooms — concentrate heat sources where people are
• Electric space heaters can bridge the gap — use them in rooms with people and keep them away from flammable materials. Never use them in bedrooms overnight unattended.
• Open cabinet doors under sinks on exterior walls to protect pipes from freezing
• Keep interior doors open to allow any residual warmth to distribute through the house
• If temperatures are dangerous (below 40°F inside), consider going to a neighbor, hotel, or warming center until delivery arrives. Pipe freezes are expensive; don't let it come to that.

Step 4: Restart the Furnace After the Delivery

This is the step many homeowners don't know: an oil furnace that ran dry may not restart automatically when the tank is refilled. Air gets into the fuel lines when the tank empties, and the pump can't draw fuel through air. You may need to bleed the system before it fires.

Try the reset button first: Most oil furnaces have a red reset button on the burner unit. Press it once. The furnace will attempt to start — you'll hear the motor and potentially smell oil as it tries to fire. If it doesn't start within 30 seconds, press reset once more and wait. Do not press reset more than 2-3 times in a row — excess unburned oil can accumulate and create a flash when it finally ignites.

If reset doesn't work — bleed the lines: Bleeding the oil line removes air from the fuel system. The bleed valve is a small brass fitting on the fuel pump (the pump is on the burner unit, usually with a nozzle and a small valve on it). Process:

1. Place a rag or small container under the bleed valve to catch oil
2. Use a small wrench (usually 3/8 inch) to slightly open the bleed valve — just enough that oil can seep out
3. Press and hold the reset button on the furnace while the valve is open
4. Watch for oil to start flowing steadily — initially it may sputter with air bubbles mixed in
5. Once oil flows steadily without air bubbles, close the bleed valve
6. Release the reset button — the furnace should fire

If you're not comfortable doing this, call your oil dealer or an HVAC technician. Most dealers will restart a furnace after a dry-out at no or low cost as part of the delivery service — ask when you place the emergency order.

Step 5: Prevent It From Happening Again

Running out once is understandable. Running out twice is a system problem. The two most reliable fixes:

Switch to automatic delivery: Automatic delivery customers almost never run dry. Your dealer tracks your usage via degree-day calculations and delivers before you hit 1/4 tank. There's no annual contract required — automatic delivery is a service agreement, not a price commitment. Read: Automatic vs. Will-Call →

Set a tank minimum alert: If you prefer will-call delivery, set a calendar reminder or use your tank gauge app (if you have a smart gauge) to order when you hit 1/4 tank — never wait until it's near-empty. Allow a 7-10 day buffer for delivery timing in winter.

Related: Furnace prep checklist for winter  ·  Automatic delivery vs. will-call  ·  How to choose a dealer with reliable emergency service