Monthly Archives: September 2014

What Are Some Signs My Furnace Isn’t Working Properly?


A furnace that is working properly does not consume excessive energy or increase the utility bills unreasonably. Additionally, such a furnace gives the desired output (heating) without endangering people’s health, lives or properties. You can easily identify some of the furnace warning signs that imply your furnace is not functioning properly. Noticing such signs on time, can help you correct the problem or call a licensed HVAC technician to correct the problems.

Warning Signs of a furnace in distress

Odor, sound and flame

Red flags over a failing furnace include odors, sounds, sparks and flames that are not common to what your furnace usually exhibits. Such sounds, smells, odors or sparks may be an indication of worn out parts, loose nuts or nozzles, inadequately lubricated parts and the presence of unwanted materials near the furnace. Detecting such irregularities should alert you of not only an inefficiently functioning furnace, but also the potential danger that could emanate from overheating, fires, obstructed airflow and gas poisoning.

Abrupt or regular breakdowns

Your furnace should never go off or switch on without your manual or automatic regulation. Regular or one-off occurrences of such incidences should alert you that there is a problem with your furnace. If you can, rectify the problem, but if you cannot, have your local HVAC technicians have a look at your furnace or thermostat.

How to check for warning signs of a furnace

Switch on the furnace, if electrical, and listen to its sounds. Rattling, knocking, creaking, screeching or shaking sounds, as well as the smell of burning metal or wires indicate faulty parts. Furnaces do not function optimally with broken or faulty parts. Light your gas, coal, oil or wood furnace and, in addition to listening for weird sounds, try to detect funny smells. Try to locate the source of the sounds or smells, and contact an HVAC technician to fix it if you cannot fix the problem. Schedule regular furnace inspection; it might pick-up small problems/ faults, with some of your furnace’s parts, which could escalate if not corrected on time.


Identifying early signs that your furnace is in trouble can help you or your HVAC contractor fix those problems in an attempt to prevent an abrupt malfunction of your furnace. In addition to regular and professional inspection of your furnace, watch out for warning signs such as strange odors or noises. Call your local HVAC Contractors for heating system and furnace service.