A Guide on the Common Types of Furnace Problems


The average home furnace lets you enjoy a comfortable indoor temperature throughout summer, and provides heat on winter nights. Modern furnaces are also more efficient compared to older models.

But like any other mechanical system, furnaces face various malfunctions. If your furnace happens to break down at the wrong time, it can leave you in uncomfortable temperatures.

That’s why it pays to familiarize yourself with the common types of furnace problems. This will help you determine whether your furnace needs servicing or if you need to call a repairman.

Let’s see the types of furnace problems you ought to know about.

Common Furnace Problems

Furnace problems can range from minor annoyances to more serious repairs. By understanding the different types of furnace problems and their causes, you can easily identify which type of problem your furnace is facing.

Identifying the issue at hand and taking the necessary steps to address the problem can help you avoid costly heating repair services and keep your furnace running efficiently.

Dirty or Blocked Air Filters

Over time, the filter will accumulate dust and debris and can become extremely dirty or blocked. An unhealthy filter can cause the furnace to overwork, and it can also restrict airflow, leading to increased energy costs.

Common signs of a dirty or blocked filter include odd noises or smells coming from the furnace, a lack of air circulation, or the furnace shutting off after a short period of time.

Replacing an air filter regularly, typically once a month or once every few months, helps to ensure that the furnace is effectively heating the home.

Thermostat Malfunction

When your furnace isn’t working properly, your thermostat may be the culprit. A malfunctioning thermostat can cause your furnace to either turn off completely, not turn on at all, or only partially heat your home.

Check to make sure the thermostat is set properly. The user manual should have information on how to do this.

If the thermostat is still not working properly, the next step would be to clean it. This can be done by removing the cover and gently wiping away any dust or debris that has accumulated.

If the thermostat still isn’t responding appropriately, consider replacing the batteries or having a professional check it out.

Failed Ignition

If you have failed ignition, the furnace won’t produce hot air or turn on. This issue could have multiple causes, such as a broken igniter, a battery or wiring issue, or a blocked air intake.

Before attempting to fix the ignition yourself, it is important to ensure that the power to the furnace is switched off, so you do not risk injury.

A visual inspection should be conducted to determine whether the source of the problem is a broken igniter. If so, then it is best to seek a professional to replace it.

However, if the source of the problem appears to be a battery or wiring issue, then it may be possible to make a repair yourself. If the air intake is blocked, then regularly cleaning the air filter is a good way to reduce the likelihood of further issues.

Prevent These Furnace Problems

All in all, furnace problems can vary in level of seriousness, but by understanding the common types, you are better able to diagnose and prevent any possible breakdowns in the future. Be sure to call your local heating technician ASAP once you encounter any of these problems.

Did this article teach you common furnace issues? Keep reading our blog for other informative topics!


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