HVAC systems installed in homes and offices create thermal comfort and provide the needed air quality for healthier living, greater productivity and happy living. Of course, all units and technologies in place require a certain deal of maintenance and check every so often to ensure continuity of doing its role and to ensure having a longer life span.
It is a good idea to immediately call a HVAC company or service provider understand what the HVAC maintenance meaning is and to do the work mainly to inspect and do maintenance on the system ideally every fall and spring. They will make sure to check all wirings and mechanisms of the unit, which will be a bit complicated and challenging for home and business owners.
Regular HVAC preventive maintenance is the best and most effective way to ensure trouble free operation and sustaining optimum HVAC unit performance. It can help avoid the system from experiencing any system failure especially during the seasons when you needed these the most. It can definitely save considerable amount of money instead of waiting for that unfortunate event to transpire.
One has to do his or her respective role in prolonging the life and increasing efficiency of the system through HVAC maintenance.
That can be achieve by simply following the HVAC maintenance tips below:

Purchasing a filter if you have not secured one

The new high efficiency pleated filter available in the market now contains an electro static charge that works like that of a magnet attracting dust, dirt and the tiniest particles even those bacteria carrying particles. Check any local hardware stores or online for more details on this.

It is best to replace filters every 90 days

Though it is also best to check this on a monthly basis, if the original filter already looks dark and clogged, be proactive in replacing this already. Having pets inside homes may also increase the chances of replacing the filters at least every month.

Ensure that there is at least two feet of clearance around the outdoor air conditioning units and heat pumps to create better output and optimum performance.
Remove and take away any debris which includes dried and fallen leaves, pollen, twigs and branches weekly especially during spring, summer and fall from the top and sides of outdoor air conditioning units as well as heat pumps. When using the lawn mower, prevent grass cuttings and clippings from getting into the unit which would create blockages and clogs which will in turn affect its efficiency.
On a monthly basis, regularly inspect insulation and refrigerant lines leading into the houses and ducts. If there is a considerable change in terms of the circulated cold air, immediately turn off the unit and inspect the tubes and channels. Replace these if missing or already damaged.
On a yearly basis, pour a cup of bleached mixed with water into the air conditioning units and drain to help ooze out build up of mold and algae which can in turn clog the system.

HVAC Maintenance Checklist for Outdoor units

Inspect and do a routine maintenance on the base pan for restricted drain openings and remove clogs and debris
Check the fan motors and fan blades for any wear and tear damages. Ensure that you lubricate older models as needed
Inspect the control box, linked with the controls or accessories, wiring and connections. The controls include the following:

Contactors and relays
Circuit boards
Heat pumps

HVAC Maintenance Checklist for indoor unit inspections

On older units and models, lubricate the motor and check if the fan belt is already up fro replacement
Check the combustion blower housing for lint, clogs or debris and clean as necessary
Make sure to inspect and check for any gas leaks in gas furnaces which would definitely smell big trouble if taken for granted.
Inspect flue system—check for proper attachment to the furnace, any dislocated sections, and for signs of corrosion. Replace if necessary.
Inspect control box, associated controls, wiring and connections
Monitor air conditioning and heat pump systems for correct refrigerant charge
Measure outdoor dry bulb temperature
Measure indoor dry and wet bulb temperature
Measure high and low side system pressures
Monitor gas furnace for correct line and manifold gas pressure—make adjustments as needed
Measure temperature rise and adjust airflow as needed
Check vent system for proper operation
Monitor system for correct line and load volts/amps