How long do oil burner furnaces last?
Most oil burner furnaces last 15 to 20 years. With consistent annual service and timely replacement of wear items (nozzle, oil filter, ignition parts), many systems reach 25 years of service life; the burner on a Beckett AFG is often serviceable even when other components age out.
Typical lifespan ranges
Oil heat equipment longevity depends on maintenance, run time, and fuel quality. Use these ranges as a practical planning guide:
| Equipment | Typical lifespan | Notes |
|---|---|---|
| Oil furnace or boiler (overall system) | 15 to 20 years | Heat exchanger and corrosion are common end-of-life drivers |
| Oil burner assembly (like Beckett AFG) | 20 to 25 years | Often rebuilt with new ignition and fuel-delivery parts |
| Key wear items (nozzle, filter, electrodes) | 1 season to a few years | Replaced during tune-ups to keep combustion stable |
What shortens the life of an oil burner furnace
These are the most common causes we see when an oil burner furnace wears out early:
- Skipping annual tune-ups (soot buildup reduces efficiency and stresses components)
- Dirty or restricted oil filter or nozzle (poor spray pattern, hard starts)
- Draft or combustion set incorrectly (runs hot, soots up, or cycles excessively)
- Water or sludge in the oil tank (clogs fuel delivery and damages the pump)
- Repeated lockouts and resets (can overheat ignition components)
Signs it is nearing end of life
If your Beckett AFG oil burner furnace is in the 15 to 20 year range, these symptoms usually mean it is time to plan repairs or replacement:
- Frequent burner lockouts or hard starts
- Strong oil odor, smoke, or visible soot around the burner
- Rumbles, bangs, or delayed ignition
- Rising fuel use with the same thermostat settings
- Repeated service calls for the same issue (ignition, pump, or combustion problems)
Why it matters
A well-tuned oil burner runs cleaner and steadier, which protects the heat exchanger, reduces soot-related service, and helps you avoid no-heat breakdowns during cold weather. When you are ready to look up maintenance and replacement items by model, start with the parts list for AFG or search by model on Sears PartsDirect.
Last updated: February 2026
How much does a new oil burner furnace cost?
A new oil burner furnace typically costs $3,000 to $10,000 installed. For a Beckett AFG oil burner setup, the final price depends on the furnace size (BTU output), efficiency rating, venting or chimney needs, and whether you are replacing just the burner or the entire furnace; you can also use Sears PartsDirect to look up parts by model when you are repairing instead of replacing.
What drives the price up or down
- Replace burner only vs. full furnace: A burner swap is usually far less than a full furnace replacement.
- Efficiency level: Higher-efficiency oil furnaces cost more upfront.
- Venting and chimney work: Liner, barometric damper changes, or code-required updates add cost.
- Oil tank and fuel line condition: Upgrades to the oil line, filter, or shutoff can add labor.
- Electrical and controls: Primary control, cad cell, transformer/igniter, and wiring repairs can change the scope.
- Labor and access: Tight basements, old piping, and cleanup time increase labor.
Typical cost ranges (installed)
| What you are replacing | Typical range | Notes |
|---|---|---|
| Burner service/tune-up | $150 to $400 | Cleaning, nozzle, filter, combustion check (varies by region) |
| Burner replacement (only) | $800 to $2,500 | Depends on burner type, controls, and setup time |
| Full oil furnace replacement | $3,000 to $10,000 | Size, efficiency, venting, and installation complexity |
How we recommend you estimate your real-world total
- Confirm what you have now: Burner model (AFG), furnace make/model, and BTU size.
- Decide repair vs. replace: If the heat exchanger and cabinet are solid, repairing the burner and controls is often the practical path.
- List required add-ons: Venting updates, oil line/filter, electrical, thermostat, and disposal.
- Compare at least two written quotes: Make sure both quotes include combustion setup and safety checks.
Why it matters
Oil heat costs are heavily affected by combustion efficiency and correct setup. A properly sized, properly tuned oil burner can reduce soot, improve reliability, and help control fuel use during cold-weather operation.
Last updated: February 2026
Why is my oil burner furnace not working?
If your Beckett AFG oil burner furnace is not working, the most common causes are no power or no call for heat, a burner safety lockout, restricted oil flow (empty tank, clogged filter/nozzle, air in the line), or ignition and flame-proving problems. Check these in order.
Quick checks (fastest wins first)
- Set thermostat to HEAT; raise setpoint above room temperature.
- Confirm the furnace service switch is on; reset the circuit breaker if tripped.
- Check the burner primary control for lockout/reset.
- Verify the oil tank has fuel; confirm the oil shutoff valve is open.
- Replace a dirty air filter; low airflow can trip the high-limit and stop the burner.
If it keeps tripping the reset
Repeated resets usually mean the burner is not establishing a stable flame.
- Press reset only once; if it locks out again, stop troubleshooting and diagnose.
- Look for oil leaks at fittings and the filter canister; air leaks can prevent priming.
- If you smell raw oil or see soot, stop and schedule service.
Troubleshooting order we use
| Step | What you’re checking | Typical issue |
|---|---|---|
| 1 | Power and call for heat | Breaker, switch, thermostat |
| 2 | Airflow and limits | Dirty filter, blocked return/supply |
| 3 | Oil delivery | Empty tank, clogged filter/nozzle, air in line |
| 4 | Ignition | Weak igniter, worn/misaligned electrodes |
| 5 | Flame proving | Dirty or failing cad cell, poor draft |
Why it matters
The primary control shuts the burner down when it does not prove flame quickly; that prevents unburned oil from building up in the combustion chamber.
For parts lookup and model-based searching for Beckett AFG components, start with the parts list for your setup, or search by model at Sears PartsDirect.
Last updated: February 2026
