When the weather gets colder, the furnaces turn on. It will see heavy use for months after that. The furnace gets used and sometimes it gets abused and then things can go wrong.

Noone is every happy when their furnace goes out on a cold night. Calling for emergency furnace repair can make you nervous about the problem and the costs while all the while the temperature in your home keeps getting lower.

Here is a list of ten of the most common furnace problems you might encounter.

Most common furnace problems

  • Lack of maintenance
  • Dirty filters
  • Ignition or pilot control problems
  • Wear and tear
  • Not blowing hot air
  • Thermostat not working
  • Frequent cycling
  • Blower runs continuously
  • Blower not running at all
  • Furnace too loud


Lack of maintenance

If your furnace is properly maintained, you’re much less likely to have issues with it. Scheduling an annual furnace maintenance can fix issues before they happen,  saving you a lot of money and problems later.

Dirty filters

Dirty or clogged air filters reduce airflow, making a furnace work harder to circulate. It also affects the air quality in your home and maybe even cause issues with allergies.

Ignition or pilot control problems

Your ignition or pilot can wear out over time and they can also get too dirty to work as they should.

Related:  How to relight a gas furnace pilot light

Wear and tear

Furnaces can wear out over time and so can some of their parts. This is another reason to have annual maintenance performed on your HVAC system.

Not blowing hot air

This issue is most commonly caused by an issue with the thermostat. It can also be caused when the pilot light goes, the ignition isn’t working or problems with a belt or power source.

Thermostat not working

A faulty thermostat can cause your home to never get warm enough.

Related: How to get your furnace ready for winter

Frequent cycling

Cycling between the “on” and “off” functions can be caused by a clogged filter, improper airflow or a bad thermostat setting.

Blower runs continuously

When the blower never stops running, the cause is usually an issue with the room thermostat or the limit switch.

Blower not running

This can be caused by a storm or power surge that causes the circuit breaker to trip or the fuse to blow. It can also be caused by a malfunctioning thermostat or blower motor.

Furnace too loud

If your furnace makes a loud noise when it starts, this could be caused by a serious problem called “delayed ignition.” This can be dangerous, and you should call a qualified HVAC specialist immediately.

A Climate Services & Systems Inc.Do you need help getting your furnace working?

Contact us online or phone 630-393-9500

We serve Warrenville, Carol Stream, Downers Grove, Geneva, Lombard, West Chicago, Naperville, and Batavia and nearby communities.