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  • Writer's pictureCMCPHC

Do I need a furnace tune-up?

Updated: May 4, 2023

Getting your furnace checked is probably not on the top of your to-do list, we understand. However, winter is fast approaching and being left with a furnace that wont work when it's cold out will soon becomes your top priority.

Now is the best time to make sure your furnace is ready to keep you and your family warm all winter long. The best way to do this is with scheduled maintenance to ensure all components are working as they should.

Furnace tune-up

Is it true that my furnace warranty will be voided if I skip annual maintenance?

Most manufacturers warranties require annual service or checks to stay valid. Missing furnace checks or forgoing them can void your warranty leading to unexpected charges. So be sure to have CMC come out once a year to get your furnace checked.

How can I troubleshoot furnace problems?

1. Change your air filter - Air filters are easy to forget about, we know! However, dirty air filters are a common culprit for malfunctioning furnaces. Dirty filters can cause reduced airflow, higher energy bills, and decreased efficiency. If you're unsure if you need to change your filter then take it out of your furnace and hold it up to the light. If you cannot see light coming through then it is time to change it out for a new one. Make sure to change your filter monthly and write the date you changed it on the side for an easy reminder.

2. Check your thermostat - Make sure the thermostat is set to heat and not cool. Also think about the last time you changed those thermostat batteries, if you can't remember, it may be time to do so.

3. Open air vents - A common myth is that you can close vents in underutilized rooms to save on your energy bills. This is NOT true. Doing this increases pressure on your furnace which makes it work harder and can cause failed blower motors, mold in your ductwork, compressor damage and other problems.

What can I expect after a furnace check or tune-up?

Improved function and efficiency - All heating systems naturally lose energy efficiency over time. This is due to many factors, including dust and dirt, natural wear and tear, and buildup in drains or on burners. During your tune-up, your HVAC technician will clean and check over your heating equipment, identifying areas of damage or corrosion. By identifying failing parts in need of replacement before they become a serious problem, you can save money on repairs!

A tune-up alone could also instantly improve energy efficiency by up to 30%. You’ll enjoy cleaner air and a cleaner residence because your HVAC unit will be distributing clean air through a clean air filter. One of the best benefits you’ll enjoy following a furnace check is lower utility bills. A neglected HVAC system works overtime to get your home to temperature. Because your heating system functions more efficiently, it will deliver superior heating at a lower cost than you otherwise may have had through the winter season.

A longer-lasting HVAC system - Your HVAC system is a very important appliance with a limited lifetime. Depending on your use, with proper maintenance, you can expect your furnace and air conditioner to last between 8-18 years. However, failing to properly maintain this appliance is one of the top reasons for the early replacement of HVAC systems. In short, if you take care of your HVAC system, it will take care of you.


Rest easy knowing that CMC Plumbing, Heating, and Cooling is here to keep your systems healthy and running. Call or text us today at 248-546-8800!

CMC Plumbing, Heating and Cooling


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