Top Reasons Why Furnaces Fail

Posted: 2018-11-15

Whether your furnace is relatively new or not, things can go wrong that can lead to equipment failure. That surely is something no one would want to encounter, especially during a cold night.

While some problems can be rectified by simply making a few adjustments, it is still recommended to have a qualified HVAC professional inspect your heating system. Four Seasons Air Specialists is your reliable heating company in White Bear Lake MN that can help you save time and money while keeping you from spending undesirable time in the cold.

Here are some of the most common reasons for your furnace to let you down.


Your system needs a healthy airflow in order to properly operate. If there is a buildup of dust, debris, and other foreign elements within the system, your furnace will be forced to work much longer than usual. This added tension causes the system to run longer in an attempt to meet your home’s heating needs. As a result, your energy bills rise and your equipment’s lifespan is shortened.

You cannot afford to neglect this recurrent overheating problem as it can damage your heat exchanger, which is an expensive part to replace. By simply managing your filters on a regular basis, you can avoid this issue. Once the airflow is clear, your furnace should work as normal. However, if the problem remains, you should call an HVAC professional for help.

Faulty Ducts

Your furnace creates heated air, which is delivered throughout your home with the use of ducts. If there is a leak, a crack or any form of damage anywhere within the ductwork, the heated air is going to be weak or cool instead of warm.

These small openings may suck in cold air that mixes with heated air, causing your furnace to be unable to provide your desired temperature. Serious damages to the ducts can even result in losing heated air completely.

Duct maintenance can be quite overwhelming for someone who is not trained to perform such a task. It is recommended to have a qualified technician inspect and repair the damage. In addition, have your ducts regularly maintained to help preserve them and avoid expensive duct repairs.

Malfunctioning Thermostat

While you may still be able to get some service out of a malfunctioning thermostat, but if it doesn’t work properly, it will keep you uncomfortable nonetheless.

If your furnace won’t even turn on or respond to the thermostat, it tells you upfront that there is something wrong with the thermostat. If you try to make adjustments on the temperature and get no response from your furnace, it could mean that the thermostat is bad.

In other cases, there are delays in response to your desired settings. When you adjust the temperature, it should almost immediately answer to those changes. Most of the time, the thermostat will produce a clicking sound whenever changes are made, then the system will activate those changes. If the thermostat fails to react to those changes, there is absolutely something wrong with the thermostat.

Also, if your furnace keeps on turning itself on and off too early and fails to provide the required heat, your home will have inconsistent heating. This will result in your home not getting the comfort you need.

Replacing the batteries usually fixes these problems. However, if you already have fresh batteries installed but the system is not responding properly, you should call an HVAC expert.

Ignition Control or Pilot Light Problems

Most new furnaces use an electronic ignition system that generates a spark to light the pilot, which acts as the ignition point when gas flows into the heating system. Ignition problems can be shown by turning the power off to the furnace and restarting the circuit breakers.

When your furnace’s ignition control is compromised, it can undermine your heating system’s ability to work properly, causing the furnace to shut down completely. If the pilot light won’t stay lit, a bad thermocouple could be the cause. It acts as a flame sensor, which is a safety mechanism that shuts the gas off should the pilot go out. A dirty orifice, a bad gas regulator, a fluctuating gas level and a draft that blows the pilot out can be the other causes of pilot light issues. Call a professional to address such problems.

Leave it to the Experts

If these problems sound familiar to you, do not hesitate to call Four Seasons Air Specialists. Our technicians are licensed, trained, and certified to identify and rectify any furnace problems. We are your preferred Mahtomedi furnace repair company serving you with dedication and commitment.