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Furnace & A/C Maintenance

Owning a home comes with a lot of imbedded responsibilities, and HVAC maintenance is one of them. Most of the HVAC maintenance that you undertake as a homeowner should be proactive and preventative maintenance to avoid larger issues. Preventative maintenance will hopefully eliminate or at least minimize future problems from occurring. Implementing a yearly plan is the best way to keep your system and home operating efficiently.

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Common HVAC Problems

There are a number of problems that can occur with your HVAC system. It is important to have a foundational understanding of common HVAC issues and how to solve them. Below are a few common HVAC problems to keep in mind when planning and scheduling maintenance.


All HVAC connecter and drain lines can develop leaks. Any leaks in hardware can cause the system to work harder than it should, which could ultimately lead to having to replace HVAC components or the entire system altogether.


Whenever you combine moisture and any type of wiring you run the risk of corrosion. Corrosion can happen to any wires or terminals related to the system and will generally cause your HVAC system to turn off and on by itself. Corrosion will cause your system to work harder, opening up the potential for more problems.

Dirt and Debris

All components of your furnace or A/C need to be free of debris. Debris can build up in ducting, filters, and the electric panel among other areas. In addition to causing your system to work inefficiently, components full of debris will pump dust and allergens into your home, reducing the air quality and flow, and potentially clogging the system.

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Setting a Furnace and A/C Maintenance Plan

It is crucial to educate yourself on common problems HVAC systems experience, how to recognize them, and how to put together an annual plan to prevent common issues. The Duct Doctor recommends a set of standard maintenance tasks that you should practice each year to ensure that your system is running the way it should.


Check to ensure that all visible components (filters, ducting, etc.) are free of debris, ensure that there is at least 2 feet of cleared space around ALL HVAC components, and install high-efficiency air filters.


Inspect your air conditioner refrigerant lines. Signs that your lines may be leaking include high-electric bills, uneven heating/cooling within the home, and a noisy HVAC system).


Replace your air filter every 90 days, turn off the water connected to the furnace humidifier in the summer, replace the humidifier filter, and turn the water back on in the fall.


Replace the batteries of all carbon monoxide detectors, lubricate the HVAC motor or replace the fan belt if needed, clean the A/C condensation drain line with bleach, and ensure the HVAC unit is standing on level ground.

HVAC Maintenance Plans

HVAC units have an average life span of 10-25 years, but with the help of preventative maintenance from The Duct Doctor, your system will last closer to 25 years! Following this list and setting up an annual furnace and A/C maintenance plan with The Duct Doctor is the best way to ensure that your system runs efficiently for the entirety of its life span.
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