Common Furnace Problems and Their Impact on Energy Usage

During the winter months, furnaces are vital for warmth and comfort. If your furnace is faulty, it will become less energy efficient and lead to higher energy bills. By learning about common furnace problems and troubleshooting tips, you can avoid unnecessary repairs and maintain your heating, ventilation, and air conditioning (HVAC) system. If you experience complex problems, it’s essential to reach out to a professional HVAC company for more help. 

1. Dirty Ductwork: A Hidden Energy Drainer

One common source of heat loss can be found in your ductwork. In fact, attics and crawlspaces can lose 25% to 45% of the heat that goes through them. If there are leaks or poorly sealed joints, you’ll end up spending significantly more on your energy costs. To ensure you have the most comfortable, energy-efficient home, have a professional inspect and seal your ducts each year. 

2. Clogged or Worn-Out Filters

A clogged air filter can lower your energy efficiency by up to 15%. For energy-efficient furnace operation, you should replace or clean your air filter every 30 to 90 days. Each manufacturer is different, so check the directions for your specific system.

3. Starting Mechanism Issues

Starting issues are some of the most common furnace problems. If your furnace doesn’t start right away, you may have an issue with your electrical system or the pilot light. When this happens, you should get your system checked by a professional HVAC technician. Otherwise, your furnace’s inefficiency will lead to a higher energy bill.

4. Blower Motor Problems Affecting Air Circulation

Sometimes, blower motors can malfunction because of faulty components. When they’re working properly, they help to circulate air throughout your house. A faulty blower motor will fail to distribute heat, causing you to spend more on energy. 

As a part of your furnace troubleshooting, pay attention to odd noises. A grinding sound may mean you need the blower motor repaired. Similarly, weak airflow is a common symptom of blower motor issues.

5. Damaged or Cracked Heat Exchanger

Normally, the heat exchanger is responsible for transferring heat from your furnace to the rest of your home. If the heat exchanger is cracked or broken in some way, it will lead to worse performance, less comfort, and higher energy bills. When looking for HVAC system issues, pay attention to unusual smells and higher energy costs because these are signs the heat exchanger is at fault.

6. Limit Switch Malfunctions Causing Overheating 

During your heating system maintenance, the technician will check for faulty components. For instance, the limit switch is normally responsible for switching the furnace off if it starts to overheat. If the limit switch isn’t working properly, it can make the furnace short-cycle or run for excessively long periods of time. Both of these problems lead to excess energy consumption and added strain on your furnace.

7. Faulty Thermostat Calibration

You may need to reach out for professional furnace repair solutions if you have a malfunctioning thermostat. When the thermostat isn’t working correctly, it will send the wrong signals to the furnace. As a result, your furnace runs longer than necessary. 

An HVAC technician can diagnose and repair a faulty thermostat. When you get the thermostat replaced, you may want to consider a programmable thermostat for added convenience and energy efficiency.

8. Unexpected Noises from the Furnace

Furnaces shouldn’t make unusual sounds. Banging, screeching, grinding, and rattling noises can indicate problems with your ductwork or motor. These sounds may also stem from loose components. To avoid higher energy bills, system failure, and costly repairs, reach out for furnace troubleshooting services right away.

9. Gas Leaks and Odors: A Critical Safety Issue

A gas leak can make your family sick. In some cases, it can even be fatal. If you smell gas in your house, you should immediately turn off your furnace and call your gas provider. You will also need to reach out to an HVAC professional to get your HVAC system issues repaired as quickly as possible.

10. Why Is My Furnace Running but There’s No Heat?

Another one of the most common furnace problems is when the furnace stops producing heat. While no heat is actually coming out, the furnace still appears to be running. Often, this type of issue is related to the heat exchanger, a clogged filter, or thermostat problems. To avoid wasted energy and ensure a comfortable home, you should reach out to an HVAC technician for professional help. 

How To Troubleshoot Common Furnace Problems

Major furnace issues will require professional heating system maintenance and repairs. For minor issues, you can try the following troubleshooting tips.

• Make sure the thermostat is set to heat mode.
• Find and seal holes or cracks in your ductwork.
• Remove anything obstructing your vents. 
• Clean or change clogged filters.
• Check your energy bills to see if there are unexpectedly high costs, indicating a repair issue. 

Call in the Experts for Furnace Repairs

For more serious problems, you should call an expert HVAC technician to handle your furnace repair solutions. An experienced company, like Alpha Heating & Air, can make sure your system is running at its best. They can perform routine maintenance so that you don’t spend as much money on energy costs and unexpected breakdowns.

Prevent Furnace Problems with Timely Maintenance 

To prevent common furnace problems from happening, the best thing you can do is schedule routine maintenance checks. Regular maintenance can prevent the majority of repair costs. Meanwhile, easy maintenance tasks, like changing air filters and cleaning vents, can be done on your own. With the proper care and professional HVAC help, you can ensure your furnace lasts as long as possible.