Taking care of your home’s HVAC system doesn’t have to be complicated. While professional service should be performed twice a year by qualified technicians, there are several simple steps you can take to help your system run more efficiently and last longer.
Here are the top 5 DIY HVAC maintenance tips every homeowner should know.

1. Change Your Air Filter Monthly
One of the easiest and most effective ways to maintain your HVAC system is to change its air filter regularly (month a month is ideal), especially during seasons of heavy use. A dirty filter can restrict airflow, reduce efficiency, and allow dust and allergens to circulate through your home. Staying on top of filter changes helps your system “breathe” better and improves indoor air quality.
2. Keep Your System Clean
Dirt and debris can build up both inside and outside your HVAC system. Make it a habit to vacuum around your indoor air vents and check that they’re not blocked by furniture, curtains, or dust. Outdoors, clear away leaves, grass clippings, and other debris from around your condenser unit. Leave at least two to three feet of clearance on all sides for proper airflow. Gently rinse off the unit’s exterior fins with a garden hose (with the power off), if needed.
3. Strategically Use Ceiling Fans and Programmable Thermostats
Want to reduce strain on your system and cut energy costs? Use ceiling fans to help circulate cool air in the summer and warm air in the winter. Just remember to reverse the fan direction when the seasons change. Also, program your thermostat to adjust the temperature when you’re not home. Even a few degrees of difference can reduce system use and extend its lifespan.
4. Protect Your HVAC from Pets
Pets can unintentionally cause trouble for your HVAC system. If your pets shed, you may need to change filters more frequently to prevent clogs. Use child-proof cord covers to keep curious chewers from damaging wires. And if you have dogs, consider installing a small, open-structured fence around your outdoor AC unit. This keeps dogs from marking their territory, which can lead to corrosion and costly damage.
5. Stay Alert to Signs of Trouble
Don’t ignore unusual sounds, smells, or performance issues. If your HVAC system starts making rattling, banging, or hissing noises, or if it’s struggling to maintain temperature, those could be early signs of a developing problem. Acting quickly can prevent a minor issue from turning into a major repair. If you hear or see anything concerning, reach out to us right away.
While these DIY tips go a long way in supporting your HVAC system’s performance, nothing replaces the value of professional maintenance. Our skilled technicians are trained to inspect, clean, and tune up your system thoroughly. This is something every homeowner should schedule twice a year to ensure optimal performance and efficiency.
Want to get the most from your system all year long? Contact us today to schedule your next appointment for HVAC maintenance in Milford, CT!
Heating and Cooling Experts Since 1959. Contact M&R Mechanical Services today for exceptional HVAC maintenance in Milford, CT.