Few home heating issues are more frustrating than an oil furnace that stops working in the dead of winter. One of the most common questions homeowners have is: How long should I hold the reset button on an oil furnace? Understanding the oil furnace reset button, its purpose, and the proper procedure for resetting your system is critical for safe operation.
In this comprehensive guide, we’ll explore how to reset an oil furnace, the recommended duration for pressing the reset button, troubleshooting tips, and preventive maintenance advice. While the Goodman MBVK electric furnace functions differently, the principles of safe furnace operation, electrical and mechanical troubleshooting, and airflow management apply across heating systems.
What is the Oil Furnace Reset Button?
The oil furnace reset button is a safety device built into most oil-fired furnaces. Its main purpose is to:
-
Shut down the furnace in case of a failed ignition or safety malfunction
-
Protect the furnace from damage due to overheating or electrical issues
-
Allow the homeowner or technician to manually restart the system after a fault is addressed
The reset button is typically located on the burner assembly or near the furnace control module and is often red or orange for easy identification.
For technical reference and safety guidelines, visit Energy.gov – Home Heating Systems.
How Long to Hold Reset Button on Oil Furnace
One of the most frequently asked questions is: How long should I hold the reset button on an oil furnace? The general guideline is:
-
Press firmly and briefly – Usually, 2–5 seconds is sufficient
-
Do not hold continuously – Holding the button too long may flood the combustion chamber with oil or stress electrical components
-
Wait between resets – If the furnace doesn’t ignite, wait 15–20 minutes before attempting another reset
It’s important to follow the manufacturer’s instructions for your specific furnace model. Repeated or prolonged pressing can damage the burner or create safety hazards.
For detailed manufacturer guidelines, consult resources like HVAC School – Oil Furnace Maintenance.
Why Oil Furnaces Need Resetting
Oil furnaces may require a reset when the system detects:
-
Ignition failure – Burner does not ignite the oil properly
-
Power interruptions – Electrical outages or blown fuses
-
Overheat or safety trips – Limit switches or flame sensors detect unsafe conditions
-
Fuel delivery issues – Blocked nozzles, dirty filters, or air in the fuel line
The reset button allows the system to restart safely once the underlying issue has been corrected. Simply pressing the button without troubleshooting may result in repeated shutdowns or further damage.
Step-by-Step Guide: Resetting Your Oil Furnace
Here’s how to reset an oil furnace safely:
-
Turn off the thermostat – Prevent the furnace from calling for heat during troubleshooting.
-
Wait for the system to cool – Allow at least 10–15 minutes if the furnace tripped due to overheating.
-
Locate the reset button – Usually on the burner or control module; consult the manual for exact placement.
-
Press the reset button briefly – Hold for 2–5 seconds, then release.
-
Restore power and turn thermostat back on – Observe ignition sequence.
-
Monitor operation – Ensure the burner ignites and runs properly.
If the furnace does not ignite after one or two resets, do not continue pressing the button. Investigate possible causes, such as fuel delivery issues, electrical problems, or burner malfunctions.
For detailed safety and troubleshooting procedures, see HVAC.com – Oil Furnace Troubleshooting.
Common Causes for Oil Furnace Reset Trips
Understanding why your oil furnace trips the reset button can prevent repeated failures:
1. Clogged Nozzle or Filter
Oil furnaces rely on clean fuel for proper ignition. A dirty nozzle or filter can prevent combustion, causing the reset button to trip.
2. Air in Fuel Line
Air trapped in the oil line can prevent the burner from igniting. Bleeding the line restores proper fuel flow.
3. Electrical Problems
Loose wiring, blown fuses, or tripped breakers may cause ignition failures or system shutdowns.
4. Faulty Flame Sensor or Ignition Components
The furnace may detect unsafe operation if sensors fail to detect a flame, causing a reset trip.
5. Overheating
Blocked airflow or malfunctioning limit switches can cause the system to overheat and shut down for safety.
Tips for Avoiding Frequent Resets
Frequent oil furnace resets can indicate ongoing problems. Preventive measures include:
-
Regular maintenance – Schedule annual inspections to clean burners, check nozzles, and inspect fuel lines.
-
Replace filters – Clean or replace fuel and air filters regularly.
-
Bleed the fuel line – Remove air from the oil line if ignition problems occur.
-
Check for airflow restrictions – Ensure vents and returns are clear to prevent overheating.
Consistent maintenance ensures your furnace runs efficiently and reduces the likelihood of repeated reset trips. For a detailed maintenance checklist, visit Energy.gov – Heating System Maintenance.
Safety Precautions When Resetting an Oil Furnace
Oil furnaces operate with combustible fuel and electrical components, so safety is paramount:
-
Always turn off the furnace before inspecting or pressing the reset button
-
Never press the reset button continuously
-
Avoid attempting multiple resets without addressing the underlying issue
-
Keep flammable materials away from the furnace area
-
If unsure about any procedure, call a licensed HVAC technician
These precautions prevent fire hazards, equipment damage, and personal injury.
Comparing Oil Furnaces and Goodman MBVK Electric Furnaces
While this guide focuses on oil furnaces, understanding the differences with Goodman MBVK electric furnaces helps homeowners maintain safe operation across systems:
| Feature | Oil Furnace | Goodman MBVK Electric Furnace |
|---|---|---|
| Fuel | Heating oil | Electricity |
| Reset | Manual reset button | Automatic safety cutoffs |
| Safety | Flame sensors, high-limit switches | Sequencer-controlled heating elements, high-limit switches |
| Maintenance | Burner cleaning, fuel line bleeding | Filter changes, blower and element inspections |
Both systems require attention to airflow, safety devices, and proper electrical operation, but electric furnaces generally don’t require a manual reset.
When to Call a Professional
If your oil furnace does not ignite after one or two resets, it’s time to call a licensed technician. Signs that professional help is needed include:
-
Reset button trips repeatedly
-
Burner fails to ignite
-
Strange odors or smoke during startup
-
Electrical components show visible damage
A trained technician can safely diagnose fuel, ignition, and electrical problems, ensuring reliable operation.
Final Thoughts
Knowing how long to hold the reset button on an oil furnace and how to perform a safe reset is critical for homeowners. The reset button is a safety device, not a permanent solution, and frequent resets indicate underlying issues that must be addressed.
By understanding the proper procedure, performing regular maintenance, and observing safety precautions, you can keep your oil furnace operating safely and efficiently throughout the heating season. For additional guidance and technical resources:
By following these best practices, homeowners can ensure that their oil furnace delivers reliable, safe, and comfortable heat all winter long.
