Why Isn’t My Furnace Working Properly?

Throughout the winter, you rely on your furnace to keep you, your family and your home warm. With regular maintenance, most furnace problems can be avoided, but with any kind of technology, it’s not uncommon to see issues like your furnace not working properly.

Here are some common situations where you may find that your furnace is not working as it should:

Furnace Not Working Properly

If your furnace has been on for a while and your home is still not as warm as it should be, there are a few reasons why this could be happening:

  • Check to make sure all of the ducts and vents are clear of obstructions.
  • Check your thermostat to ensure it’s set to ‘Heat’ and the fan is set to ‘On’ or ‘Auto’.
  • Check your furnace filters and replace them if they’re dirty to allow for more airflow.
  • If you’ve tried all of the above, call a furnace technician to check for more serious issues.

Your Furnace Isn’t Turning On

Whether it’s an issue with your thermostat or a problem with the circuit breaker, try some of these troubleshooting tips if your furnace isn’t putting out any hot air:

  • Check to make sure your thermostat is set to ‘Heat’.
  • Check the circuit breaker in case it’s been tripped or a fuse has blown.
  • Check the furnace’s power switch and ensure it’s on — furnace switches look identical to light switches so this is often a common cause of furnaces not coming on.
  • Reset your motor with the Reset button, as there may have been an overload.
  • If you have a gas furnace, check that the pilot light hasn’t gone out.

Your Furnace Cycles On & Off Too Often

When a furnace works properly, it should turn on for a while so that enough heat is expelled into your home, and then turn off again for a period of time so it maintains your preferred temperature — but your furnace shouldn’t cycle on and off too often. Often, you can fix this by adjusting your thermostat’s heat anticipator to a ‘longer’ setting. Sometimes, this kind of problem is an indication that the thermostat needs to be replaced, or that your filters are clogged.

Your Furnace Or Ducts Are Noisy

Another tell-tale sign that your furnace isn’t working properly is the sudden onset of noises coming from the furnace itself or the ductwork. If the problem is in the ductwork, you may want to consider calling a furnace technician to fix the issue.

Common furnace noises that indicate a problem with your unit include:

  • Pinging or popping: This often indicates that the ductwork is expanding and contracting, or that air is blowing past a loose flap of metal.
  • Rattling: If your furnace cabinet is rattling, you may need to tighten the cover panels.
  • Squealing: The most common cause of squealing is your furnace motor belt slipping off. You may want to consider calling a furnace technician for this fix.
  • Grinding: If the blower is making grinding noises, the motor’s bearings may need to be replaced by a technician.

At Cross Heating & Air Conditioning, our team of technicians can help with all of your furnace maintenance, repair and installation needs. Get in touch with us today.

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