Avoid These Common Furnace Problems This Winter

Winter is the worst time for your furnace to fail. As temperatures drop, your heating system works harder to keep your home warm, making it more susceptible to breakdowns. However, many furnace issues can be prevented with routine maintenance and awareness of common problems.

At D-N-D Services, we have been providing expert heating repair and maintenance in Rockwall and surrounding areas since 1997. Below, we’ll go over some of the most common furnace problems homeowners face in the winter and how to avoid them.

Dirty or Clogged Air Filters

Why It Happens:

Over time, dust, pet hair, and debris accumulate in your furnace filter, restricting airflow and forcing your system to work harder. This can lead to overheating, reduced efficiency, and even system failure.

How to Prevent It:

1. Check your furnace filter every 1-3 months and replace it as needed.
2. If you have pets or suffer from allergies, consider upgrading to a high-efficiency filter.
3. A clean filter improves airflow, reduces strain on the system, and helps lower energy bills.

Thermostat Malfunctions

Why It Happens:

A malfunctioning thermostat can cause your furnace to run inconsistently, cycle too frequently, or not turn on at all.

How to Prevent It:

1. Ensure your thermostat is set to “heat” and the temperature is set higher than the current room temperature.
2. Replace the batteries if your thermostat runs on battery power.
3. Consider upgrading to a programmable or smart thermostat for better efficiency.

Ignition or Pilot Light Issues

Why It Happens:

Older gas furnaces have pilot lights, while newer models use electronic ignition systems. If these components fail, your furnace won’t be able to produce heat.

How to Prevent It:

1. Keep the pilot light area clean to prevent dirt buildup.
2. If the pilot light goes out frequently, have a professional check the thermocouple.
3. For electronic ignition systems, ensure sensor components are free of dust and debris.

Frequent Cycling (Turning On and Off Too Often)

Why It Happens:

If your furnace turns on and off frequently, it could be due to a dirty air filter, improper thermostat settings, or airflow restrictions. This leads to higher energy bills and increased wear and tear on your system.

How to Prevent It:

1. Replace the air filter regularly to maintain proper airflow.
2. Ensure that air vents and registers are open and unblocked.
3. Have a professional check for issues like oversized heating systems or faulty limit switches.

Weak or No Airflow from Vents

Why It Happens:

Weak airflow can result from blower motor issues, blocked air ducts, or clogged filters. If left unaddressed, this problem can cause your system to overheat.

How to Prevent It:

1. Inspect and clean air vents to ensure proper airflow.
2. Replace air filters regularly to prevent blockages.
3. If airflow issues persist, have your ductwork inspected for leaks or obstructions.

Unusual Noises from the Furnace

Why It Happens:

Loud banging, rattling, or screeching noises can indicate loose parts, motor problems, or airflow restrictions.

How to Prevent It:

1. Schedule annual furnace maintenance to catch issues early.
2. If you hear a banging noise, it could be due to dirty burners causing delayed ignition—this should be inspected by a professional.
3. A screeching sound may indicate a worn-out blower motor belt that needs replacement.

Furnace Blowing Cold Air

Why It Happens:

A furnace that blows cold air instead of warm air may have issues with the pilot light, thermostat settings, or dirty burners.

How to Prevent It:

1. Ensure the thermostat is set correctly.
2. If you have a gas furnace, check if the pilot light is lit.
3. Schedule routine maintenance to keep the burners clean and functioning properly.

Carbon Monoxide Leaks

Why It Happens:

A cracked heat exchanger can leak carbon monoxide (CO), a dangerous, odorless gas that can cause serious health issues or even be fatal.

How to Prevent It:

1. Install carbon monoxide detectors near sleeping areas and test them regularly.
2. Schedule annual furnace inspections to catch any signs of cracks or damage.
3. If you experience symptoms like dizziness, headaches, or nausea, leave your home and call a professional immediately.

Furnace Won’t Turn On

Why It Happens:

If your furnace refuses to start, it could be due to a tripped circuit breaker, faulty thermostat, or ignition failure.

How to Prevent It:

1. Check your breaker box to see if a fuse has tripped.
2. Ensure the furnace switch is turned on.
3. If your furnace still won’t turn on, call a professional for troubleshooting.

How to Prevent Furnace Problems This Winter

The best way to avoid furnace issues is through routine maintenance. At D-N-D Services, we offer comprehensive furnace inspections, repairs, and maintenance to keep your system running smoothly.

Benefits of Regular Furnace Maintenance:

1. Extends the lifespan of your furnace
2. Improves heating efficiency and lowers energy costs
3. Reduces the risk of breakdowns during winter
4. Ensures safe operation and prevents carbon monoxide leaks

Conclusion

If you want to avoid unexpected furnace problems this winter, let D-N-D Services help. Our NATE-certified technicians provide fast, reliable furnace repair and maintenance in Rockwall, Rowlett, Heath, Sunnyvale, Mesquite, Garland, Greenville, Sulphur Springs, Dallas, and surrounding areas.

Don’t wait until your furnace breaks down—schedule a tune-up today! Contact us now to book your appointment. Your comfort is our priority!