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Do you need Furnace Repair or Replacement?

When is time for a furnace repair or replacement?

If your gas furnace is failing and causing you problems then it may be a time for a furnace repair or replacement. If it is cold outside and furnace is the fundament of your home comfort but you can no longer rely on it then you need to look at few factors when deciding on furnace repair or replacement. Often it is best to contact your local HVAC contractor and seek expert advice but you can also look for signs that your furnace is giving you.

Here are simple steps you can take prior to calling an HVAC contractor and deciding on furnace repair or replacement

  • If you are not receiving enough hot air flow from your furnace, check your furnace filter as it might be clogged and prevent air from flowing and furnace replacement may not be necessary
  • Ensure that your thermostat is set to Heat and the desired temperature
  • Check if there are any loose wires or a malfunction in the thermostat or if a thermostat battery needs to be changed.
  • See if your furnace breaker is switched ON and that there is power to the furnace

Furnace Repair

If your heating system is under 10 years old then there is a high chance that a problem can be solved through repairs by a licensed HVAC contractor. Usual lifespan of a furnace is 15 years and it will operate efficiently if regular maintenance is done on it. A licensed HVAC contractor can determine the problem and if it is something minor it can be fixed on the spot. In some cases a part will need to be ordered and the issue can be fixed within a short period of time and without excessive costs of furnace replacement.  General furnace repair rule states that you should repair a furnace that is under 10 years old as long as the repair costs are less than one third of the cost of installing new heating system.

Furnace replacement

In cases where your furnace is reaching its lifespan it will start to fail more and more often therefore a furnace replacement is something to discuss. Furnace repair or replacement question is most commonly asked when furnace is under 10 years old but when it is heating 15 years it is heating its anticipated lifespan.  Calling an HVAC contractor for an estimate is something that you should consider when your furnace is getting old. If your furnace is still within the lifespan but is constantly causing you problems and extensive repair costs that seem to never stop then replacing to a new high efficiency model might be the solutions in your case.

Many energy efficient furnaces available for sale.

Affordable furnace monthly rental program.

Our skilled & licensed technicians are ready to help.

Protecting your investment has never been easier.


Furnace repair or replacement is an individual decision and should be looked at based on the cost of furnace repair or replacement, age of the equipment and its efficiency level. Every home and heating system is different therefore an expert advice is a must when making this important decision. DeMark Home Ontario specialist are here to assist you in making the right decisions and ensuring that you have peace of mind during the cold season. To schedule you maintenance or to speak with one of our specialists call 647-847-2998 or fill out online request form.

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Upgrading to a high-efficiency heating and cooling system offers more than energy savings.

Take advantage of these rebates today!


This item comes with absolutely free standard installation. We’ll ensure that the product is completely installed to code and fully functioning prior to leaving.


Great news! Receive a brand new digital thermostat absolutely free when renting this HVAC product from DeMark Home Ontario.


Great news! When renting a furnace or air conditioner, you’ll get your first 2 months absolutely rent free.


Great news! When renting a furnace and air conditioner together, you’ll get your first 3 months absolutely rent free.


This product carries a manufacturer warranty and we’re happy to explain it in full to you. Feel free to get in touch with us for more information or see the Warranty Information tab for more information


If your order is placed and confirmed by 11am, we can have your HVAC product installed within the same day.

Certain conditions apply, not available on all products.


This water heater is subject to reduced rental rates based on the DHO discount program. Save money on your bill every single month!

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Save money on this item when buying it along with a qualifying high-efficiency furnace or air conditioner.

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Great news! When renting a qualifying water heater, you’ll get your first 2 months absolutely rent free.


Promotional code can be found on the eFlyer, Brochure or promotional email that you received from us.

*If you are an existing customer please refer to the mail or email that was sent to you after the installation of your equipment as it contains your promotional code. If you are having troubles locating it please call us and one of our Customer Service Representatives will be happy to assist you.

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Notice for Power Vent Water Heater Customers

Effective August 2007, gas code requires technicians working on venting to replace black ABS vent pipe with white UL-certified vent pipe.

We will upgrade your venting pipes at no additional cost.

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