Preparing for Your Big Day

Posted on: 1 March 2023

Oil-fired furnaces are popular for homeowners living where natural gas is unavailable or for those who prefer oil's reliability and efficiency. Like any heating system, oil-fired furnaces require regular maintenance and occasional repairs to operate at peak performance. Below are some common problems with oil-fired furnaces, how to troubleshoot them, and when to call a professional for repair.

Problem: No Heat or Low Heat

If your oil-fired furnace is not producing heat, it may be due to one of the following issues:

Fuel Supply: Check the fuel tank to ensure enough fuel. If the tank is low, refill it and see if the furnace starts to produce heat.

Thermostat: Check that the thermostat is set to the desired temperature and to "heat" mode.

Clogged Fuel Line or Filter: A clogged fuel line or filter can restrict fuel flow to the furnace, causing it to produce less heat. Have a professional HVAC technician clean or replace the fuel filter or line.

Faulty Ignition System: If the furnace's ignition system is not working correctly, it may be unable to light the fuel, resulting in no heat or low heat. Call a professional HVAC technician to inspect and repair the ignition system.

Problem: Noisy Furnace

If your oil-fired furnace is making unusual noises, it could be due to one of the following reasons:

Dirty Burner: Dirt and debris can accumulate on the furnace's burner, causing it to make a rumbling or rattling noise. Have a professional clean the burner to resolve the issue.

Loose Fan Belt: A loose fan belt can cause a high-pitched squealing or screeching noise. Tighten the fan belt, or have a professional do it.

Airflow Obstruction: A blocked air filter, air duct, or vent can cause a whistling or hissing sound. Replace the air filter and clear any air duct or vent obstructions.

When to Call a Professional for Repair

While some minor issues with your oil-fired furnace can be fixed with simple troubleshooting, other problems require the expertise of a professional HVAC technician. Here are a few situations when you should call a professional for repair:

Carbon Monoxide Leaks: A malfunctioning furnace can produce deadly carbon monoxide gas. If you suspect a carbon monoxide leak, evacuate your home immediately and call a professional for emergency repair.

Frequent Breakdowns: If your furnace breaks down frequently, it may be time to replace the unit or call a professional for a more comprehensive repair.

Strange Odors: Lastly, unusual odors from your oil-fired furnace, such as oil smells or smoke, can indicate a severe problem that requires professional repair.  

Contact a local heating repair service to learn more.