Top 5 Furnace Issues Homeowners Should Be Aware Of

As the chill of the cold season stretches out, many of us find ourselves increasingly reliant on our home heating systems to keep warm and comfortable. However, frequent use of your furnace can lead to wear and tear, and eventually, issues might arise. 

Recognizing common furnace problems can help you address issues promptly, making the need for emergency furnace repair less likely. Let's look at the top five furnace issues to keep an eye on, ensuring your home stays cozy throughout the colder months.

5 Common Home Furnace Problems to Look Out For

Clogged Filters: The Silent Efficiency Killer

One of the simplest yet most overlooked aspects of furnace maintenance is replacing or cleaning the air filters. Over time, filters can become clogged with dust, pet dander, and other debris, leading to several problems:

• Reduced airflow, making your system work harder
• Decreased efficiency, leading to higher heating bills
• Potential for overheating, as clogged filters restrict air to the heat exchanger

Regularly checking and replacing your furnace filters can prevent these issues and prolong the life of your heating system.

Pilot Light Issues: The Flame That Must Not Flicker

The pilot light in your furnace is a small flame that ignites the gas burner. If your pilot light won't stay lit or you're having trouble lighting it, your home could be left in the cold. This could be due to several issues, such as:

• A faulty thermocouple is preventing gas flow
• Dirt accumulation around the pilot light
• Drafts blowing the light out

Pilot light problems typically require professional heating repair as they deal with the gas components of your furnace.

Malfunctioning Thermostat: When Your Comfort Zone is Compromised

Your thermostat is the command center of your heating system. When it's not functioning correctly, it can cause your furnace to cycle on and off more frequently, or even worse, not turn on at all. Here's what you might encounter:

• Incorrect temperature readings due to poor placement or calibration
• Aging or faulty wiring is preventing proper communication between the thermostat and the furnace
• Dead batteries in programmable thermostats

Regular inspections and maintenance can help prevent thermostat-related issues.

Faulty Blower Components: When the Wind Stops Blowing

The blower motor and fan are critical components that circulate warm air throughout your home. Problems with these parts can lead to:

• Unusual noises, such as humming or banging
• Lack of airflow, even though the furnace is running
• A continuously running blower due to a faulty limit switch

Timely furnace repair by a professional is essential if you face such issues to avoid complete system failure.

Dirty Burners: The Flame's Foe

The burners in your furnace create the combustion necessary to generate heat. Over time, these burners can become dirty, causing:

• Irregular flame and inefficient heating
• Increased production of carbon monoxide
• The need for more frequent furnace cycling

A skilled technician can clean the burners annually to maintain safe and efficient operation.

Learn Why Your Furnace May Not Be Running at Its Best

What does it mean if my furnace is constantly cycling on and off?

Frequent cycling can be caused by an oversized furnace, a clogged filter, improper airflow, or an incorrect thermostat setting. It can also be due to a malfunctioning thermostat or a faulty ignition system. 

Consistent cycling puts extra stress on your furnace, so rectifying this quickly is important for the longevity of your system and can often be solved with a simple filter change or thermostat adjustment. Speak to our HVAC professionals to determine the best strategy for saving money and reducing heating system stress. 

Is it normal for my furnace to make a loud noise when it starts up?

While some noise at startup is normal, loud bangs or screeching sounds are not; booming noises could signal dirty burners that delay ignition, causing gas buildup. Screeching may indicate a problem with the blower motor or its components. It's advisable to get a loud furnace checked by a technician to prevent further damage.

Can a dirty filter really shut down my furnace?

Yes, a dirty filter can cause your furnace to shut down. A clogged filter restricts airflow, causing the heat exchanger to overheat and the furnace to shut off as a safety measure. Regularly changing your furnace filter can prevent this problem and help keep your system running efficiently.

Why is there a strange smell coming from my furnace?

Unusual smells coming from your furnace could indicate various issues, such as a dust buildup burning off, which is common if the furnace hasn't been used for a while. However, a persistent or foul odor, like something similar to rotten eggs, could point to a gas leak, which is an emergency and requires immediate attention. If you notice an odd smell, it's best to turn off the unit and contact a professional.

What should I do if my furnace is leaking water?

If your furnace is leaking water, it could be caused by condensation from high-efficiency furnaces, a clogged drain line, or an issue with the humidifier attached to the furnace. If possible, immediate steps include turning off the furnace and stopping the water source. It's critical to resolve these issues promptly to prevent water damage or mold growth.

Learn How Regular Furnace Maintenance Can Save You Money

Maintaining your furnace can be straightforward if you're aware of common issues to look out for. However, when in doubt or faced with complex problems, professional furnace repair and heating services from Pilot Mechanical are your best bet. By making sure your heating system is in top shape, you can extend its lifespan and enjoy uninterrupted comfort during the cold season. Remember, if your heating system breaks down, there's no need to panic—assistance is just a call away.