September 11, 2023

Furnaces play an integral role in keeping our homes warm and comfortable, especially during the chilly winter months. However, like any mechanical system, furnaces aren’t immune to issues. Understanding the most common problems that can arise with heating systems is essential for homeowners to ensure efficient functioning and avoid unexpected breakdowns. Let’s dive into the top furnace problems and potential solutions to keep your home cozy throughout the year.

1. Lack of Maintenance

One of the primary culprits behind furnace problems is a lack of regular maintenance. Over time, dust, debris, and other particles accumulate within the unit, affecting its efficiency and performance. Neglecting routine maintenance can lead to increased energy consumption, decreased indoor air quality, and even system failure.


Scheduling annual professional furnace maintenance can help prevent these issues. Regular cleaning, inspection, and minor repairs can significantly extend the lifespan of your furnace and maintain its optimal performance.

2. Dirty or Clogged Filters

Filters are vital components of furnaces. They trap dust, allergens, and other particles, preventing them from circulating through your house. However, when filters become dirty or clogged, they obstruct airflow, causing the furnace to work harder and less efficiently.


Check your filters monthly and replace them every three months or as recommended by the manufacturer. For households with pets or family members with allergies, more frequent replacements might be necessary.

3. Ignition Problems

Modern furnaces use various methods for ignition, such as electric igniters or pilot lights. If the ignition system malfunctions, your system might not heat your house at all, leading to discomfort, especially during colder periods.


If you suspect an ignition problem, it’s best to call a professional technician to diagnose and repair the issue. Attempting to fix ignition problems yourself can be dangerous, as it involves working with gas or electrical components.

4. Thermostat Issues

The thermostat is the control center for your furnace, regulating the temperature within your home. Problems with the thermostat can result in inaccurate temperature readings, causing the heater to cycle on and off unnecessarily or not at all.


Before assuming your furnace has a problem, double check the thermostat settings. If issues persist, it might be time to replace the thermostat or have it professionally recalibrated.

5. Blower Motor Dysfunction

The blower motor is responsible for circulating warm air throughout your house’s duct system. If the blower motor malfunctions, you may experience uneven heating, cold spots, or insufficient airflow.


Regular maintenance can prevent blower motor issues. If the motor is making strange noises, vibrating excessively, or not running at all, consult a professional technician to diagnose and repair the problem.

6. Frequent Cycling

Frequent cycling occurs when the furnace turns on and off more frequently than usual. This can be caused by various factors, including overheating due to restricted airflow, thermostat issues, or a malfunctioning blower motor.


Addressing the root cause of frequent cycling requires a systematic approach. Begin by assessing the HVAC system’s air filter. If you find extensive damage or wear and tear, replace the filter. If the problem persists, consult a professional to identify and fix the issue.

7. Noisy Operation

Unusual noises coming from your furnace can be unsettling. Rattling, banging, grinding, or squealing sounds often indicate mechanical problems within the system, such as a loose belt, damaged bearings, or a malfunctioning blower motor.


Don’t ignore strange noises coming from your heater. Attempting to diagnose and fix complex mechanical issues on your own can lead to more damage. Contact a qualified technician to assess and repair the problem.

8. Ductwork Issues

While the furnace itself is vital, the ductwork is equally important in delivering warm air throughout your home. Problems with the duct system can hinder efficient heating and impact indoor air quality.


Regularly inspect your ductwork for leaks, gaps, and blockages. Seal any leaks using duct tape or mastic sealant, and consider insulating your ducts if they’re located in unheated areas. Professional duct cleaning every few years can also help maintain optimal airflow and indoor air quality.

Get Your Furnace Inspected Today!

By familiarizing yourself with these common furnace problems and their solutions, you can stay proactive in addressing issues as they arise. Remember, regular professional maintenance, timely filter replacements, and quick action when problems occur will help you avoid costly repairs and ensure your furnace operates efficiently for years to come. If you’re in Bellevue, NE or a surrounding area, contact Apollo Heating & Air Conditioning today to schedule a professional furnace inspection, maintenance, or repair! Our team can also assist with air conditioning repair, installation, and maintenance, along with indoor air quality solutions.

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