Strange Noises from Your Oil Burner?
Rumbling, banging, squealing, or pulsating? These sounds often indicate developing problems that should be addressed before they cause a breakdown.
What Does Your Burner Sound Like?
Rumbling on Startup
Urgent: Indicates delayed ignition—oil pooling before catching fire. Can lead to puffback. Stop using and call immediately.
Banging/Kettling
Water overheating and creating steam bubbles. Often caused by scale buildup or low water flow. Schedule service soon.
Squealing/Grinding
Motor or pump bearings failing. The motor needs service before it seizes completely and causes a no-heat emergency.
Pulsating/Vibrating
Air in fuel line or nozzle issues causing unstable combustion. Burner struggling to maintain steady flame.
Warning: Rumbling Can Lead to Puffback
If your burner makes a loud rumbling or "whooshing" sound when starting, stop using it immediately. This indicates delayed ignition—oil is accumulating before igniting. Continued use risks a puffback explosion that can spread soot throughout your home and cause injury.
Common Causes & Repair Costs
What's causing the noise and how to fix it
| Cause | DIY? | Description | Cost |
|---|---|---|---|
Delayed Ignition Oil pools before igniting, causing rumbling or mini-explosions | Pro | Oil pools before igniting, causing rumbling or mini-explosions | $200-400 |
Worn Motor Bearings Burner motor squealing or grinding from bearing failure | Pro | Burner motor squealing or grinding from bearing failure | $350-700 |
Kettling (Scale Buildup) Mineral deposits cause water to overheat and bang | Pro | Mineral deposits cause water to overheat and bang | $300-600 |
Air in Fuel Line Causes pulsating, sputtering combustion | Pro | Causes pulsating, sputtering combustion | $150-300 |
Loose Components Vibration from loose mounting bolts or panels | Yes | Vibration from loose mounting bolts or panels | $0 Pro: $100-200 |
Worn Pump Coupling Flexible coupling between motor and pump worn/cracked | Pro | Flexible coupling between motor and pump worn/cracked | $150-300 |
Need help identifying the sound?
Our technicians can diagnose noise issues quickly.
When to Call a Professional
Call Immediately If:
- Rumbling sound on startup (puffback risk)
- Grinding noise with burning smell
- Loud banging during operation
Schedule Service Soon If:
- Squealing that's getting louder over time
- Gurgling in pipes (air in system)
- New vibrations or rattling
Frequently Asked Questions
Frequently Asked Questions
Get answers to common questions about our services
6 questions from our knowledge base