Should You Press the Reset Button on an Oil Furnace or Boiler?
Not over and over. Beckett's instruction manual for its AF and AFG oil burners warns never to start or reset a burner when excess oil has collected in the appliance, the appliance is full of vapor, or the combustion chamber is very hot. Those conditions can lead to heavy smoke, soot-up, a hot gas puff-back, and fire and asphyxiation hazards. If the burner is cool, you smell no oil and see none pooled, one reset is a reasonable test. If it locks out again, leave it off and call for service.
The control on the burner is counting. In the Beckett manual, if the primary control does not sense flame by the end of its trial for ignition, it shuts down in a safety lockout that must be reset by hand. Three lockouts in a row put the control into restricted lockout, and on Beckett's GeniSys control that takes holding the reset button for 15 seconds or more to clear. Every failed start is a chance for oil to collect in the chamber, which is exactly the condition Beckett warns about. This guide covers what the reset button does, what to check first, what to do if you ran out of oil, and why a lockout in a Somerset County cold snap needs quick attention.
What Does the Reset Button on an Oil Burner Do?
The reset button sits on the burner's primary control, the electronic box that runs the ignition sequence and watches for flame. When the control does not see a flame in time, it stops the burner in a safety lockout. Pressing reset tells it to try the sequence again.
Beckett's GeniSys control uses status lights to show what happened:
Green: flame is sensed and the burner is running.
Flashing red: soft lockout. A quick click of the reset button, under one second, clears it.
Solid red: restricted, or hard, lockout. Holding the reset button 15 seconds or more clears it.
Yellow: pump prime mode, used during service.
A restricted lockout means the control has already failed to light several times. That is a signal to stop and call a technician, not to hold the button down.
Why Is Pressing Reset Over and Over Dangerous?
Beckett's safety section is direct. Do not try to start the burner when excess oil has accumulated, when the appliance is full of vapor, or when the combustion chamber is very hot. Do not try to re-establish a flame with the burner running if the flame goes out. Make sure the appliance is free of oil and oil vapor before starting or resetting.
For an oil-flooded appliance, Beckett says to shut off the electrical power and the oil supply to the burner and clear all accumulated oil before continuing. If the condition still looks unsafe, it says to contact the fire department. Clearing oil from a combustion chamber is a job for a technician.
Beckett lists heavy smoke and soot-up among the results, and any combustion problem raises carbon monoxide concerns. The carbon monoxide and furnace safety guide explains where alarms belong. If an alarm sounds, get everyone outside and call 911.
What Should You Check Before Pressing Reset?
The Beckett manual lists checks for owners, and a few basic ones apply before any reset:
Check the oil tank gauge. Beckett tells owners to check the tank level weekly.
Check the power. Make sure the burner's switch and breaker are on.
Check the thermostat. Confirm it is set to heat and above room temperature.
Look around the burner. Beckett's daily owner checks include clear ventilation openings, nothing blocking the burner's air inlet, no combustible materials nearby, and no oil or water leaking.
Use your senses. If you smell oil or see oil under or inside the unit, do not press reset.
If everything checks out and the unit is cool, press reset once. The guide to what to do when your heat goes out covers other steps to take while you wait for service.
What If You Ran Out of Heating Oil?
Running out of oil stops the burner, and refilling the tank does not always get it going again. The pump may need to be primed, and Beckett's control has a pump prime mode for that job. Beckett marks everything past the owner section of its manual for qualified service technicians only.
Heating oil is expensive this fall, which makes it tempting to stretch deliveries. The U.S. Energy Information Administration put Pennsylvania's residential heating oil price at $5.833 a gallon on October 5, 2026, up from $3.265 a year earlier. Beckett's advice runs the other way: keep the oil tank full, especially during the summer, to prevent moisture from condensing on the inside of the tank.
What Does a Lockout Mean in Freezing Weather?
A burner in lockout makes no heat, and Beckett warns about the result. If the burner locks out or the power fails while the house is unattended in severe cold, plumbing can freeze in a matter of hours. Beckett suggests considering a security system that can sense low temperatures in the home.
Somerset County sees that kind of cold. NOAA's 1991 to 2020 climate normals show the Meyersdale station averaging 8.2 nights a year at or below 0°F, compared with 2.1 at Pittsburgh International Airport. If you leave home in January, have someone check the house, or use a low temperature alert.
Why Does Annual Oil Burner Service Matter?
Beckett states that a qualified service technician must service the burner every year. Its maintenance list shows the parts a technician works on:
Replace the oil supply line filter.
Replace the nozzle with one that matches the exact specification.
Clean the cad cell, the light-sensing eye that tells the control a flame is burning.
Check the oil pump pressure.
Inspect the vent and chimney for soot.
A burner that keeps locking out needs a technician to find which part is at fault. The list of furnace problems that need immediate professional help covers other warning signs, and the guide to why DIY HVAC repair can be dangerous explains why gas and electrical repairs belong with a technician.
FAQ
Where is the reset button on an oil burner?
It is on the burner's primary control, the box mounted on the burner itself. On Beckett's GeniSys control, the reset button sits with the status lights.
How many times can I press the reset button?
Press it once. Beckett's controls go into restricted lockout after three lockouts in a row, and each failed start can leave oil in the chamber.
What is an oil burner puff-back?
Beckett lists a hot gas puff-back among the hazards of starting a burner with oil or vapor in the chamber, along with heavy smoke and soot-up.
Why does my oil burner keep locking out?
Beckett's annual maintenance list covers the parts a technician checks: a clogged oil filter, a worn nozzle, a dirty cad cell, low pump pressure or a sooted vent. A technician can test each one.
Can I bleed the oil line myself after running out?
Beckett reserves everything beyond the owner checks for qualified service technicians. Call for service rather than opening the fuel system.
Should I keep my oil tank full in summer?
Yes. Beckett advises keeping the tank full, especially in summer, to prevent condensation inside the tank.
Van Bremen's Heat & Air Services Oil and Gas Heating
Van Bremen's Heat & Air installs and services gas and oil boilers, furnaces and heat pumps from its office at 214 Stoystown Rd in Somerset, with service across Somerset, Fayette, Cambria and Westmoreland Counties and in Morgantown, WV. Its heating maintenance covers furnaces, boilers and heat pumps. See the heating services page and maintenance services page.
Visit Van Bremen's Heat & Air or call (814) 483-1735 today. Contact us for more information.
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